Potassium nitrate

About: Potassium nitrate is a research topic. Over the lifetime, 3537 publications have been published within this topic receiving 29450 citations. The topic is also known as: Nitric acid, potassium salt & Saltpeter.

Effect of various culture conditions on shoot multiplication and GC–MS analysis of Plumbago zeylanica accessions for plumbagin production

Abstract: Plumbago zeylanica, a pharmaceutically important medicinal plant, contains a wide range of phytocompounds. Culture parameters like carbon source, nitrogen source, and culture media are essential for the development and growth of explants. In this investigation, the influence of various carbon sources (sucrose, glucose, and fructose at 3% concentration), nitrogen source (ammonium nitrate, sodium nitrate, and potassium nitrate) and plant tissue culture media (MS medium, Gamborg’s B5 medium, White medium and Nitsch medium) on shoot multiplication of five different accessions was studied. Optimum growth of all five accessions was observed in MS media containing 3% sucrose and ammonium nitrate as a source of carbon and nitrogen. Out of five accessions, IC-524441 showed the highest shoot multiplication. Further, methanolic extracts of all accessions (grown in MS media containing 3% sucrose and ammonium nitrate as nitrogen source) were prepared and comparison of extracts in DPPH assay indicated that accession number IC-524441 was the most effective free radical scavenging agent. Total phenolic, flavonoid and tannin content ranges were from 20 to 70 µg/ml, 40 to 100 µg/ml and 55 to 120 µg/ml, respectively, and the highest amount was found in accession number IC-524441. Sucrose and ammonium nitrate content may be responsible for increased antioxidant activity, flavonoids content, phenolic content, and tannin content in accession number IC-524441. GC–MS of ethyl acetate extract of all five accessions of P. zeylanica was conducted (grown in MS media containing 3% sucrose and ammonium nitrate as nitrogen source). GC–MS analysis of the aerial part showed the presence of various phytocompounds, which include 1,4-naphthalenedione, 3-eicosene, 5-eicosene, phthalic acid, o-anisic acid, thioctic acid, 1-octadecene, 5-t-butyl-cycloheptene, 2-benzoyl-1,2-dihydro-1-isoquinolinecarbonitrile, octadecanal, silane, 3-methoxy-2-methyl-2-(1-phenyl-ethylamino)-propionic acid, and 1-nonadecene. Accession number IC-524441 contains the highest amount of plumbagin, i.e. 14.19 ± 0.5 µg/ml as compared to the others.

Water culture nutrient solution and preparation method thereof

Abstract: The invention relates to a water culture nutrient solution. The water culture nutrient solution is characterized by comprising the following components by weight: 200-1000 parts of calcium nitrate, 200-800 parts of potassium nitrate, 50-100 parts of ammonium nitrate, 100-200 parts of ammonium dihydrogen phosphate, 100-500 parts of magnesium sulfate, 0.4-1 part of zinc sulfate, 0.6-1 part of manganese chloride, 0.5-1.3 parts of manganese sulfate, 0.02-0.06 part of sodium molybdate, 500-1200 parts of sepiolite powder, and 600-1400 parts of medicinal stone powder. Sepiolite powder and medicinal stone powder provide numerous rare elements and mineral elements to the water culture nutrient solution, also have certain heat preservation effect on the root systems of vegetables, prevent necrosis of vegetables because of root system frosting, and also can absorb a lot of toxins to ensure the normal growth of vegetables. Therefore, the water culture nutrient solution provided by the invention issuitable for most vegetables.

Foliar Potassium Application on Olive Tree

Abstract: The objective of this work was to evaluate the effects of potassium (K) fertilization on vegetative growth, fruit production and leaf mineral content of olive tree (Olea europeae L.) under rainfed condition. Different fertilizer, techniques and rates of application were applied in 2003 on Chemlali olive. The potassium fertilizer used was potassium nitrate. The foliar fertilizer rates were 50 and 100% of the tree requirement and for soil spreading the rates were 100% and 200% of the tree needs. A control was also observed with no applied fertilization as used on the experiments region (Sfax). The results did not show any significant effect of treatment on olive vegetative growth. However, foliar treatment increases significantly leaf area. Foliar fertilization at 100% accelerates fruit maturation, increases fruit weight, pit ratio and polyphenol, respectively to 0.81g, 3.65 and 59.37ppm. No significant differences on fat content and acidic composition were observed. Leaf mineral analysis revealed that K fertilization increased significantly K foliar content with no differences for the others mineral elements (N, P, Mg).