Влияние удобрений полученных на основе Кызилкумских фосфоритов на урожайность хлопчатника в условиях луговых почв Миянкаля

Аннотация

Subjects of research: Meadow soils, sorts of cotton-plant Omad and Akdarya-6, new phosphoruscontaining fertilizers, nitric-phosphorus fertilizer and nitrocalsium phosphate fertilizer. Purpose of work: To study the influence of new phosphoruscontaining fertilizers NPF and NCPF on agrochemical properties of the soils with carbonmagnesium salting under conditions of Zarafshan valley, to determine the optimum norm of fertilizers, to ascertain their influence on the yield and quality of raw cotton. Methods of research: The field and laboratory experiments, conducted according to “Mcthodics of conducting field experiments” (Scientific Research Institute of Cotton-growing of the Rcpcblic of Uzbekistan, 2007), “The static processing of experimental data” B.A.Dospckhov (1985), “Methods of agrochemical, agrophysical and microbiological researches in irrigated cotton growing districts” (1963), “Argochcmical methods of research of soils” (1975), “Methods of argochcmical researches of soils” (1980). The results obtained and their novelty: For the first time on the soils with carbonate-magncsium salting under conditions of Zcrafshan valey there were studied new phosphoruscontaining fertilizers NPF and NCPF, obtained from Kizilkum phosphorites, there was ascertained their influence on the soil and plants, there was given the comparative characteristics of their effectiveness. There was studied the influence of new fertilizers on the content of mobile phosphorus in the soil, fractional composition of phosphates, factor of capacity and intensity, assimilation, the coefficient of application of phosphorus from fertilizers, and also the balance and coefficient of rcturting of phosphorus. Practical value: There was ascertained the optimum norm of new phosphorus containing fertilizers NPF and NCPF at cultivation the sorts of cotton-plants Omad and Akdarya-6 under conditions of Zarafshan valley, their influence on the growth, development and yield-capacity of cotton-plant. Degree of embedded and economic effectivity: There was inculcated on the area of 115 ha, the yield of the sort Omad-38 c/ha, Akdarya-6-40 c/ha, net profit 440-460 thousand sums correspondingly. Field of application: At cultivation cotton of Omad and Akdarya-6 sorts on the soils with carbonate magnesium salting under conditions of Zarafshan valley. The scicntific-thc oretical conclusions in educational and scientific work of Scientific Research Institute and Higher Educational Institions of the Republic of Uzbekistan.