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.

Albidin, an antibiotic red pigment from Penicillium albidum

Abstract: Penicillium albidum Sopp grows well on all media tested and usually gives optimum antifungal titres in 4–8 days. Good titres are obtained on Czapek-Dox, Raulin-Thom and Weindling media, but not on peptone/Lemco/glucose; good titres are also obtained on a simplified medium with ammonium nitrate, potassium nitrate and ammonium tartrate nitrogen sources, but not with ammonium sulphate. When glucose concentration and depth of medium are varied, best growth per unit weight of sugar is obtained at low sugar concentrations. In general, initial pH has little effect on the activity produced. The antibiotic albidin is obtained from Raulin-Thom culture filtrates by extraction with chloroform in yields of about 8 mg./l. In aqueous solution at pH 3 albidin loses about 90 % of its activity in 24 hr. at 25° C. and is much less stable at a higher pH. It inhibits germination of a range of moulds at concentrations varying from 0·04 to 3 μg./ml., and is bacteriostatic at concentrations of the order of 25 μg./ml. Albidin prevents oxygen uptake by Saccharomyces cerevisiae at 10−3 m , and reduces it by 82 % at 10−4 m . A second, colourless, fungistatic substance melting at 156°C., and giving a deep green colour with ferric chloride, has been obtained. This is active against Botrytis allii at 25 μg./ml.

Thermal decomposition of potassium bis -oxalatodiaqua-indate(III) monohydrate

Abstract: Indium (III) is precipitated with oxalic acid in the presence of potassium nitrate maintaining an overall concentration of 0·125 M in HNO3. Chemical analysis of the complex salt obtained indicates the formula, K[In(C2O4)2]·3H2O. Thermal decomposition studies show that the compound decomposes first to the anhydrous potassium indium oxalate and then to the final mixture of the oxides through formation of potassium carbonate and indium (III) oxide as intermediates. Isothermal study, X-ray diffraction pattern and IR spectral data support the proposed thermal decomposition mechanism.

Effect of seed‐placed fertilizer on the emergence (germination) of soybeans (Glycine max L.) and snapbeans (Phaseolus vulgaris L.)

Abstract: Field trials were established on a loamy fine sand and a silt loam using snapbeans and soybeans as test crops, respectively. Row fertilizer was placed with the seed (seed‐placed). Treatments were arranged in a 3×3×3 factorial experiment, and N, P, and K were applied in all combinations at three rates (0, 3.4, and 6.8 kg/ha). Ammonium nitrate (AN), monoammonium phosphate (MAP), concentrated superphosphate (CSP) and potassium chloride (KCl) were used as sources of N, P and K. Additional treatments compared MAP with diammonium phosphate (DAP) and KCl with potassium nitrate (KNO3). The salt index of each treatment was inversely related to emergence, i.e. as the salt index increased, the emergence decreased. Level of N was more important than level of P or K in regards to reduction in emergence. Snapbeans grown on a loamy fine sand were extremely sensitive to damage from seed‐placed fertilizer, even at rates as low as 3.4 kg/ha of N, P or K. Soybeans planted on a silt loam soil were less sensitive tha...

Compound conditioned medium for injection of woody plants and preparation method thereof

Abstract: The invention relates to the fertilizer technical field, in particular to a compound conditioned medium for the injection of woody plants and a preparation method thereof; the compound conditioned medium contains various nutrient elements and physiological amendments of plants and the compound conditioned medium is prepared by mixing urea, potassium nitrate, calcium nitrate, potassium dihydrogen phosphate, zinc sulfate, magnesium sulfate, manganese sulfate, copper sulfate, boric acid, disodium ethylenediaminetertraacetate, naphthylacetic acid and indolebutyric acid together and adding water; the compound conditioned medium of the invention can not only strengthen the root activity of woody plants such as the rooting speed, rooting rate and the like, but also satisfies the desired nutrient elements of trees, improves the nutrient use efficiency, reduces the agricultural pollution and has low cost, simple production and high efficiency production.