Showing papers on "Potassium nitrate published in 2015"

A New Phase Change Material Based on Potassium Nitrate with Silica and Alumina Nanoparticles for Thermal Energy Storage.

Abstract: In this study different nanofluids with phase change behavior were developed by mixing a molten salt base fluid (KNO3 selected as phase change material) with nanoparticles using the direct synthesis method. The thermal properties of the nanofluids obtained were investigated. Following the improvement in the specific heat achieved, these nanofluids can be used in concentrating solar plants with a reduction of storage material. The nanoparticles used (1.0 wt.%) were silica (SiO2), alumina (Al2O3), and a mix of silica-alumina (SiO2-Al2O3) with an average diameter of 7, 13, and 2–200 nm respectively. Each nanofluid was prepared in water solution, sonicated, and evaporated. Measurements of the thermophysical properties were performed by DSC analysis, and the dispersion of the nanoparticles was analyzed by SEM microscopy. The results obtained show that the addition of 1.0 wt.% of nanoparticles to the base salt increases the specific heat of about 5–10 % in solid phase and of 6 % in liquid phase. In particular, this research shows that the addition of silica nanoparticles has significant potential for enhancing the thermal storage characteristics of KNO3. The phase-change temperature of potassium nitrate was lowered up to 3 °C, and the latent heat was increased to 12 % with the addition of silica nanoparticles. These results deviated from the predictions of theoretical simple mixing model used. The stored heat as a function of temperature was evaluated for the base salt, and the nanofluids and the maximum values obtained were 229, 234, 242, and 266 J/g respectively. The maximum total gain (16 %) due to the introduction of the nanoparticles (calculated as the ratio between the total stored heat of the nanofluids and the base salt in the range of temperatures 260–390 °C) was also recorded with the introduction of silica. SEM and EDX analysis showed the presence of aggregates in all nanofluids: with silica nanoparticles they were homogenously present while with alumina and silica-alumina also zones with pure salt could be detected.

Mechanical Dispersion of Nanoparticles and Its Effect on the Specific Heat Capacity of Impure Binary Nitrate Salt Mixtures

Abstract: In this study, the effect of nanoparticle concentration was tested for both CuO and TiO2 in eutectic mixture of sodium and potassium nitrate. Results showed an enhancement in specific heat capacity (Cp) for both types of nanoparticles (+10.48% at 440 °C for 0.1 wt % CuO and +4.95% at 440 °C for 0.5 wt % TiO2) but the behavior toward a rise in concentration was different with CuO displaying its highest enhancement at the lowest concentration whilst TiO2 showed no concentration dependence for three of the four different concentrations tested. The production of cluster of nanoparticles was visible in CuO but not in TiO2. This formation of nanostructure in molten salt might promote the enhancement in Cp. However, the size and shape of these structures will most likely impact the energy density of the molten salt.

20 Years Advances in Preparation of Potassium Salts from Potassic Rocks: A Review

Abstract: Long-term research on key techniques of clean utilization of potassic rocks from over twenty localities has been performed to settle the shortage of soluble potassium resources in China. The results show that K-feldspar as the principal mineral enriched in potassium could be decomposed in the media of Ca(OH)2, NaOH, KOH-H2O solution via hydrothermal treatment, into tobermorite, hydroxyl-cancrinite, and kalsilite respectively. By further processing, these compounds are feasible for being as slow-release carrier of potassium nitrate, extracting alumina, and preparing farm-oriented fertilizers of potassium sulphate and nitrate. Correspondingly, the filtrate is KOH, (Na, K)2SiO3, and K2SiO3 solution, from which potassium carbonate, sulphate, nitrate, and phosphate could be easily fabricated. As NaOH and KOH are recycled in the processing chains by causticizing sodium and/or potassium metasilicate solutions, the hydrothermal alkaline techniques as developed in this research have several advantages as lower consumption of disposable mineral resources and energy, maximized utilization of potassic mineral resources, as well as clean productions etc. Based on the approaches presented in this paper, the technical system of efficiently utilizing insoluble potassium resources has been established. The hydrothermal alkaline methods are feasible to be industrialized on a large scale, thus resulting in decreasing imports of potash fertilizers, improving the pattern of potassium fertilizer consumption, and enhancing the supplying guarantee of potassium resource in China.

Rheological Analysis of Binary Eutectic Mixture of Sodium and Potassium Nitrate and the Effect of Low Concentration CuO Nanoparticle Addition to Its Viscosity.

Abstract: This paper is focused on the characterisation and demonstration of Newtonian behaviour of salt at both high and low shear rate for sodium and potassium nitrate eutectic mixture (60/40) ranging from 250 °C to 500 °C. Analysis of published and experimental data was carried out to correlate all the numbers into one meaningful 4th order polynomial equation. Addition of a low amount of copper oxide nanoparticles to the mixture increased viscosity of 5.0%–18.0% compared to the latter equation.

Vegetable soilless culture nutrient solution and manufacturing method thereof

Abstract: The invention discloses a vegetable soilless culture nutrient solution and a manufacturing method thereof. The invention is characterized in that every liter of water contains 5-7 mg/L potassium nitrate, 7-9 mg/L ammonium nitrate, 4-6 mg/L potassium dihydrogen phosphate, 2-4 mg/L ammonium dihydrogen phosphate, 0.5-0.7 mg/L disodium edetate, 0.2-0.4 mg/L magnesium sulfate, 0.04-0.07 mg/L iron chelate, 0.06-0.09 mg/L minor element and 2-4 mg/L boric acid. The rotten cottonseed hull contains abundant organic matters, and has certain actions of the slow-release controlled-release fertilizer. The formula is reasonable, and the pH value is approximate to neutrality. The vegetable soilless culture nutrient solution provides nutritive elements required by vegetable growth, and the ion concentration can not easily change. The vegetable soilless culture nutrient solution can effectively fix the plant root system, and has the advantages of simple production operation, low cost, high vegetable yield and good quality.

Influence of nitrogen sources on the enzymatic activity and grown by Lentinula edodes in biomass Eucalyptus benthamii

Abstract: Lignocellulose is the most abundant environmental component and a renewable organic resource in soil. There are some filamentous fungi which developed the ability to break down and use cellulose, hemicellulose and lignin as an energy source. The objective of this research was to analyze the effect of three nitrogen resources (ammonium sulfate, saltpetre, soybean) in the holocellulolitic activity of Lentinula edodes EF 50 using as substrate sawdust E. benthamii. An experimental design mixture was applied with repetition in the central point consisting of seven treatments (T) of equal concentrations of nitrogen in ammonium sulfate, potassium nitrate and soybean. The enzymatic activity of avicelase, carboxymetilcellulase, β-glucosidase, xylanases and manganese peroxidase was determined. The humidity, pH, water activity (aw) and qualitative analysis of mycelial growth in 8 times of cultivation were evaluated. The results showed negative effect on enzyme production in treatments with maximum concentration of ammonium sulfate and potassium nitrate. The treatments with cooked soybean flour expressed higher enzymatic activities in times of 3, 6 and 9 days of culture, except in the activity of manganese peroxidase. The highest production was observed in the treatment with ammonium sulfate, and soybean (83.86 UI.L-1) at 20 days of cultivation.

Spectrophotometric Evaluation of Potassium Nitrate Penetration Into the Pulp Cavity

Abstract: Clinical Relevance The tooth is permeable to potassium nitrate–containing formulations with an application time of 30 minutes.

Effect of Carbon and Nitrogen Sources on the Growth, Reproduction and Ligninolytic Enzymes Activity of Dictyoarthrinium Synnematicum Somrith

Abstract: The effect of different basal media, temperature, pH, days of incubation, carbon and nitrogen sources was studied on growth, reproduction and ligninolytic enzymes production of Dictyoarthrinium synnematicum Somrith. The fungus reproduced by chlamydospores and produced maximum growth in Glucose-peptone medium. It produced chlamydospores only at 24℃ and pH range of 5-9. The optimum mycelial growth rate was observed at 24℃ and pH 5 after 16 days of incubation. It showed gradual increase in the production of Lignin peroxidase up to 30 days, Manganese peroxidase up to 18 days of incubation after which it decreased and Laccase up to 22 days. The optimum growth and laccase activity were attained in lactose supplemented medium whereas the highest Lignin peroxidase and Manganese peroxidase activity was observed with glucose. It produced chlamydospores with fructose, glucose, maltose, sucrose and xylose. Sodium nitrate is the best inorganic nitrogen source for growth. Resting spores were formed in inorganic and organic nitrogen sources used in basal medium. Ammonium phosphate and potassium nitrate supported highest activity of Lignin peroxidase whereas best Manganese peroxidase activity was exhibited with ammonium oxalate and laccase with sodium nitrate. The fungus did not express ligninolytic enzymes activity with any organic nitrogen source.

Nutrient solution formula for plant

Abstract: The invention discloses a nutrient solution formula for plant. The nutrient solution formula for plant is composed of water, calcium nitrate, ammonium nitrate, potassium dihydrogen phosphate, potassium sulfate, potassium nitrate, magnesium sulfate, urea, EDTA ferric sodium salt, copper sulfate and boric acid. Compared with the prior art, the nutrient solution formula integrates the nutrition configuration for different plant, and the proportion is reasonable; the nutrient solution formula can be suitable for water planting plant and potted soil plant, and the nutrient solution formula fully provides nutrition for the plant; the nutrient solution formula is strong in universality, broad in application and worthy of popularization.

Effect of sucrose and potassium nitrate on biomass and saponin content of Talinum paniculatum Gaertn. hairy root in balloon-type bubble bioreactor

Abstract: Objective To increase biomass and saponin production in hairy root culture of Talinum paniculatum Gaertn. ( T. paniculatum ) in balloon-type bubble bioreactor (BTBB). Methods Hairy roots which were collected from leaf explants of T. paniculatum were infected by Agrobacterium rhizogenes strain LB510. The hairy roots were cultivated at 400 mL Murashige and Skoog liquid medium without growth regulator (MS0) in 1 000 mL BTBB. Each BTBB had 2 g hairy roots as initial inoculum and these cultures were treated with various concentrations of sucrose (3%, 4%, 5%, 6% w/v) and potassium nitrate (0.5, 1.0, 1.5 and 2.0 strength of MS medium). Cultures were maintained for 14 days. Fresh and dry weights of hairy roots at the end of culture were investigated. Results Various concentrations of sucrose influenced the biomass accumulation of hairy roots. Maximum biomass was reached by MS medium supplemented with 6% sucrose and it was approximately threefold higher than control. Culture supplemented with potassium nitrate at 2.0 strength of MS0 could increase biomass accumulation of hairy roots until 0.14 g dry weight and it was almost threefold higher than control. However, the maximum saponin content was obtained by MS medium supplemented with 5% sucrose and 2.0 strength potassium nitrate of MS. Conclusions Based on this research, those conditions can be used to produce biomass and saponin of hairy root of T. paniculatum in the large scale.

Effect of seed priming by potassium nitrate on germination and biochemical indices in Silybum marianum L. under salinity stress

Abstract: For investigation of the effect of seed priming by potassium nitrate on germination and biochemical indices of Silybum marianum L. under salinity stress, factorial experiment based on completely randomized design with two factor including different concentrations of potassium nitrate (0, 0.25 and 0.35 mM) and calcium chloride (0, 150 and 250 mM) at three replicates was carried out. Results showed that salinity stress decrease the germination indices and amount of seedling protein and also increase the peroxidase activity. With using of 0.25 mM potassium nitrate germination indices were improved and peroxidase activity was reduced. Also, results showed that seed priming with 0.35 mM was not suitable. Therefore, seed priming with 0.25 mM potassium nitrate was improved seedling growth and germination indices under salinity stress. DOI: http://dx.doi.org/10.3126/ijls.v9i1.11922 International Journal of Life Sciences Vol.9(1) 2015 23-28

Hydroponic nutrient solution for ornamental flowers

Abstract: The invention discloses a hydroponic nutrient solution for ornamental flowers. The hydroponic nutrient solution comprises calcium nitrate potassium nitrate, potassium sulfate, ammonium nitrate, magnesium sulfate, calcium superphosphate, potassium dihydrogen phosphate, NaFe-EDTA.3H2O, boric acid, manganese sulfate, zinc sulfate, copper sulfate, ammonium molybdate, aspartic acid, tryptophan, vitamin B12, indoleacetic acid, thiophanate methyl, agricultural streptomycin, and the balance of water. The nutrient solution has the advantages of scientific proportioning, consideration of concentrations and proportions of nutritional elements in the nutrient solution, achieving of high solubility, high purity, few impurities and low price of a selected fertilizer, reasonable control of the amount of the fertilizer, timely supplementation of lost trace elements, and fertilizing and flower growth regulating effects.

Biological-organic fertilizer special for corn and preparation method thereof

Abstract: The invention discloses a biological-organic fertilizer special for corn and a preparation method thereof, and belongs to the technical field of crop formula fertilizers. The biological-organic fertilizer special for the corn is prepared form, seaweed extracts, urea, ammonium polyphosphate, potassium nitrate, magnesium sulfate monohydrate, EDTA chelate ferrum, EDTA chelate manganese, EDTA chelate zinc, EDTA chelate cuprum, boric acid, ammonium molybdae and fulvic acid potassium. The raw materials all adopts commercially available materials except that the seaweed extracts are produced by Stanley Fertilizer Limited Company. The prepared fertilizer is comprehensive in nutrition, scientific and reasonable in formula, water-soluble, easy to apply and capable of improving soil and effectively promoting the growth of crops by combining quick acting and long acting.

Method for manufacturing chemically reinforced glass

Abstract: A method for manufacturing chemically reinforced glass, including a step for bringing glass including sodium into contact with an inorganic salt including potassium nitrate, thereby performing ion exchange between Na in the glass and K in the inorganic salt, the method for manufacturing chemically reinforced glass wherein the inorganic salt includes at least one species of salt selected from the group consisting of K2CO3, Na2CO3, KHCO3, NaHCO3, K3PO4, Na3PO4, K2SO4, Na2SO4, KOH, and NaOH, and the method includes a step for cleaning the glass after the ion exchange, a step for acid-treating the glass after the cleaning, and a step for alkali-treating the glass after the acid treatment.

Metal element improved biochar-based nitrate radical adsorbent and preparation method thereof

Abstract: The invention discloses a metal element improved biochar-based nitrate radical adsorbent and a preparation method thereof. Straws are used as raw materials, and metal ions are impregnated, pyrolyzed and washed under certain conditions, so a metal ion improved cbiochar is prepared. According to the metal element improved biochar-based nitrate radical adsorbent and the preparation method thereof disclosed by the invention, by using adsorption research on nitrate radical waste water and comparing the adsorption effect of the biochar before and after improvement, the improved biochar prepared by the preparation method disclosed by the invention has good adsorption effect for potassium nitrate, wherein Mg improved wheat straw biochar has optimal adsorption effect for nitrate nitrogen; compared with the unmodified biochar, the Mg improved biochar prepared under the optimizing conditions has the advantages that the adsorption performance is improved by 10 times, and the adsorption equilibrium can be realized in a shorter time. The modified biochar adsorbent is a green adsorbent with application potential and can be used for effectively removing the nitrate nitrogen in a water body; besides, the effects of fixing carbon, reducing discharge and relieving the non-point source pollution are achieved.

Nutrient solution special or water culture of lettuce and preparing method of nutrient solution

Abstract: The invention relates to a nutrient solution special for water culture of lettuce and a preparing method of the nutrient solution, and belongs to the technical field of nutrient solutions of water-cultured lettuce. A formula of the nutrient solution special for water culture of the lettuce comprises a major element solution A, a microelement solution B and a chicken manure biogas slurry solution C. The major element solution A comprises the solution A1 and the solution A2, wherein the solution A1 is composed of 236 g/T of calcium nitrate terahydrate, 133.5 g/T of potassium nitrate and 26.5 g/T of ammonium nitrate, and the solution A2 comprises 50 g/T of monopotassium phosphate, 58 g/T of potassium sulphate and 123 g/T of magnesium sulfate heptahydrate. The microelement solution B comprises 10-20 g/T of chelated iron, 1.43 g/T of boric acid, 1.065 g/T of manganese sulfate, 0.11 g/T of zinc sulfate, 0.04 g/T of copper sulfate and 0.01 g/T of ammonium molybdate. The chicken manure biogas slurry solution C is composed of 2, 000 ml of a concentrated solution of a high-concentration chicken manure fermentation solution. The concentrated solution of the high-concentration chicken manure fermentation solution is added, the using amount of nutrient elements is reduced by 30-50%, and environment friendliness is achieved. The quality of the water-cultured lettuce is improved, static cultivation is achieved, and the lettuce becomes mature earlier by around 7 days.

Effect of arbuscular mycorrhizal and bacterial inocula on nitrate concentration in mesocosms simulating a wastewater treatment system relying on phytodepuration

Abstract: High nitrogen concentration in wastewaters requires treatments to prevent the risks of eutrophication in rivers, lakes and coastal waters. The use of constructed wetlands is one of the possible approaches to lower nitrate concentration in wastewaters. Beyond supporting the growth of the bacteria operating denitrification, plants can directly take up nitrogen. Since plant roots interact with a number of soil microorganisms, in the present work we report the monitoring of nitrate concentration in macrocosms with four different levels of added nitrate (0, 30, 60 and 90 mg l(-1)), using Phragmites australis, inoculated with bacteria or arbuscular mycorrhizal fungi, to assess whether the use of such inocula could improve wastewater denitrification. Higher potassium nitrate concentration increased plant growth and inoculation with arbuscular mycorrhizal fungi or bacteria resulted in larger plants with more developed root systems. In the case of plants inoculated with arbuscular mycorrhizal fungi, a faster decrease of nitrate concentration was observed, while the N%/C% ratio of the plants of the different treatments remained similar. At 90 mg l(-1) of added nitrate, only mycorrhizal plants were able to decrease nitrate concentration to the limits prescribed by the Italian law. These data suggest that mycorrhizal and microbial inoculation can be an additional tool to improve the efficiency of denitrification in the treatment of wastewaters via constructed wetlands.

The effect of 5-amino-1H-tetrazole on the combustion performance and ignition capability of boron/potassium nitrate igniter

Abstract: The performance of boron/potassium nitrate/5-amino-1H-tetrazole-based pyrotechnic igniter, used as an initiator in airbag gas generators, was investigated. It was found that 5-amino-1H-tetrazole could significantly improve the stability, burning characteristics and ignition capability of boron/potassium nitrate igniter. When mixed with mass ratio of 27/73/10, boron/potassium nitrate/5-amino-1H-tetrazole showed an activation energy of 396.90 kJ mol−1. When used to ignite the guanidine nitrate and basic cupric nitrate gas-generating agent, it resulted in an increase by 19 % in the maximum pressure, as well as a decline in the burning time and ignition delay time by 12 and 24 %, respectively.

Iron removal from waterlogged wood: Extraction by electrophoresis and chemical treatments

Abstract: The presence of iron oxides (lepidocrocite, goethite) in archeological wood may result in a degradation of the wood matrix Extraction of these iron oxides is largely dependent on their solubility In this study, balsa wood samples were impregnated with iron oxides to test extraction treatments Additionally, archeological wood samples were also examined to determine treatment efficiency Electrophoresis and simple immersion treatments were performed using various chemical solutions: a neutral and a conductive substance (potassium nitrate), an acid (acetic acid), three alkaline chelating agents (tri-ammonium and tri-sodium citrate and sodium oxalate), three acidic and slightly acidic chelating agents (ethylenediaminetetraacetic acid (EDTA), citric acid, and oxalic acid), and a reductant (sodium dithionite) Potassium nitrate did not extract sufficient amounts of iron, irrespective of whether the treatment was conducted by electrophoresis or simple immersion; any observable dissolution was attribut

Special selenium-rich liquid fertilizer for moso bamboo shoots and preparation method of fertilizer

Abstract: The invention relates to a special selenium-rich liquid fertilizer for moso bamboo shoots and a preparation method of the fertilizer. The liquid fertilizer comprises an organic and inorganic mixed selenium source prepared from potassium nitrate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, boric acid, EDTAZnNa2, EDTAMnNa2, NaFeEDTA, sodium silicate, ammonium molybdate, 5-nitroguaiacol sodium salt, sodium dodecyl benzene sulfonate, sodium benzoate and a selenium-rich yeast, wherein the organic and inorganic mixed selenium source is formed by preparing the selenium-rich yeast into a seed and then carrying out fermentation enrichment culture, inactivation and decomposition in an inorganic selenium containing culture medium. The preparation method comprises the following steps of dissolving effective components according to a certain sequence; regulating a pH value; and treating until constant volume is achieved. The special selenium-rich liquid fertilizer for the moso bamboo shoots, which is disclosed by the invention, has the advantages of comprehensive nutrient element, reasonable and safe formula, high fertilizer utilization ratio, no environmental pollution and the like, is convenient to fertilize, improves the utilization efficiency of a selenium element and increases the selenium content of bamboo shoots by using an organic selenium source and ensures the safety in fertilizer use and selenium-rich moso bamboo shoot eating.

Effect of pre-harvest foliar spray of calcium and potassium on fruit quality of Pear cv. Pathernakh

Abstract: Growing costs of fertilizers and increasing concern about ground water pollution has resulted indiscriminate or excessive soil fertilization problem that may be solved by more efficient fertilizer application technologies. The availability of new promising oriental pear or Japanese pear [Pyrus pyrifolia (Burm) Nakai] cultivar like ‘Patharnakh’, pave an opportunity for extending its cultivation under tarai region of Uttarakhand. Even though the cultivar ‘Patharnakh’ is good for tarai region but the quality is not much good to attract consumer acceptance. An experiment was conducted in 2013 to 2014 to study the effect of foliar spray of micronutrients on Pear. Fifteen year old pear trees were treated with three concentrations (1.0, 1.5 and 2.0%) of calcium and potassium nutrients viz., calcium chloride, calcium nitrate, potassium sulphate and potassium nitrate; and water spray as a control at 30 days intervals starting from fruit set, that is, 20th March 2013, 20th April 2013 and 20th May, 2013. Each treatment was replicated thrice, in which one tree serving as a unit treatment. The experiment was conducted in Factorial Randomized Block Design. The observations were recorded on the basis of biochemical characters viz., total soluble solids, acidity, ascorbic acid contents, total sugars, reducing sugar and non reducing sugar. Fruits treated with potassium nitrate at 1.5% showed the highest total soluble solids (11.72 oBrix), total sugars (7.62%), reducing sugars (6.10%) and non reducing sugars (1.51%). However, titratable acidity (0.46 %), and ascorbic acid (6.42 mg/100 g) were found maximum with calcium chloride at 2.0% concentration. Therefore on the basis of economic point of view reducing the excessive cost of applied inputs by use of micronutrients can be an alternative to get quality produce. So, these treatments may be recommended for adaptation of Patharnakh pear in tarai region. Key words: Pear, calcium and potassium spray, fruit quality.

Fruit swelling type seaweed organic liquid water soluble fertilizer and production method thereof

Abstract: The invention discloses a fruit swelling type seaweed organic liquid water soluble fertilizer, and belongs to the technical field of formula fertilizers of crops. The fruit swelling type seaweed organic liquid water soluble fertilizer is prepared from the following raw materials: a seaweed extracting solution, urea, ammonium polyphosphate, potassium nitrate, magnesium sulfate monohydrate, EDTA chelated iron, EDTA chelated manganese, EDTA chelated zinc, EDTA chelated copper, boric acid, ammonium heptamolybdate and potassium fulvic. The fruit swelling type seaweed organic liquid water soluble fertilizer is comprehensive in nutrition, scientific and reasonable in formula, fully water-soluble and easy to apply, improves soil, integrates fast acting and long acting, and effectively promotes the crop growth.

Method for preparing mechanically-sensitive glass by two-step isothermal ion exchange

Abstract: The invention provides a method for preparing mechanically-sensitive glass by two-step isothermal ion exchange. An ion exchange medium is taken as tempered molten salt for preparing the mechanically-sensitive glass to perform ion exchange; the ion exchange medium takes potassium nitrate or potassium nitrate and sodium nitrate as main components and is added with potassium hydroxide, potassium carbonate, potassium fluoborate, diatomite, clay and cerium oxide. The method for preparing the mechanically-sensitive glass by two-step ion exchange comprises the following steps: firstly arranging a glass plate in the tempered molten salt obtained in the first step to perform ion exchange for 24h to 28h at the temperature of T1; and subsequently arranging the glass plate in the tempered molten salt obtained in the second step to perform ion exchange for 15min to 60min at the temperature of T2, wherein T1 is equal to T2. The two-step ion-exchanged type mechanically-sensitive glass prepared by the method disclosed by the invention is good in each performance, has required strength, is quite good in breakage concentricity and has multiple cracks for early warning of breakage.

Special controlled-release water soluble fertilizer for grapes and preparation method thereof

Abstract: The invention relates to a special controlled-release water soluble fertilizer for grapes and a preparation method of the special controlled-release water soluble fertilizer. The controlled-release water soluble fertilizer is prepared from the following raw materials in parts by weight: 190-230 parts of ammonium nitrate, 40-60 parts of ammonium dihydrogen phosphate, 30-50 parts of triple superphosphate, 90-110 parts of monopotassium phosphate, 230-260 parts of potassium nitrate, 100-130 parts of potassium sulfate, 30-60 parts of chelated medium trace element mixture, 7-10 parts of borax and 3-6 parts of inorganic gel particle. The preparation method comprises the following steps: (1) treating monopotassium phosphate and potassium sulfate by use of the inorganic gel particle to obtain controlled-release monopotassium phosphate and potassium sulfate; and (2) mixing and dispersing the raw material components at a high speed to obtain the controlled-release water soluble fertilizer. According to the special controlled-release water soluble fertilizer for grapes, a part of phosphorus and potassium nutrients in the controlled-release water soluble fertilizer have slow release feature, so that the water soluble fertilizer is in accordance with the law of the nutrient absorption in a grape growth period, the fertilizer efficiency utilization rate of the water soluble fertilizer is improved and the controlled-release water soluble fertilizer has high market application value.

Influence Of Different Nitrogen And Organic Carbon Sources On Microalgae Growth And Lipid Production

Abstract: Microalgae based biofuels are getting attention due to energy crisis and enviromental protection. In the present study, the Chlorella sp. was cultivated in BG-11 medium at batch mode. The effect of different nitrogen (sodium nitrate, potassium nitrate and urea) and organic carbon (glucose, glycerol and sucrose) sources were analyzed on growth and lipid accumulation on this species. The highest biomass growth and biomass productivity of chlorella sp. was found 1.29±0.04 g/l, 76.96±4.5mgl -1 d - 1 in urea. However in case of organic sources, the biomass growth and productivity was found maximum in glucose (1.43±0.075 g/l 86.04±3.2 mgl -1 d -1 ). The lipid content was examined using folch method and found better in potassium nitrate nitrogen source (11.84%) . Among organic carbon sources, the maximum lipid content (13.22% and lipid yield 189.94 mg/l were found in case of glucose, followed by glycerol and sucrose. Various properties of biodiesel obtained from chlorella sp. such as Cetane number, Saponification value, Iodine value and Degree of unsaturation were followed standerds set by the national petroleum agency (ANP255), ASTMD6751 and EN14214. Keywords: Biodiesel, Biomass growth, Chlorella sp., Lipid extraction, Transesterification