Vol. 5, Issue 6 (2020)
Impact of norms of organo-mineral compost and mineral fertilizer on the productivity of soil and winter wheat
Author(s): Iminov Abduvali Abdumannobovich, Hatamov Salimjon Rakhimjon Ugli, Mirzaev Shokhrukh Fayzullaevich, Kuziboev Shukhratjon Tursinalievich
Abstract: When winter wheat is planted continuously (monoculture) for 11 years and treated without fertilizers, the amount of humus in the topsoil (0-30 cm) is 41.5% higher than in the first year of the experiment, the total nitrogen content is 63.9%, 20 tons per hectare. humus content was reduced by 33.1%, total nitrogen content by 52.8%, humus content by 31.5%, total nitrogen by 50.0% when mineral fertilizers were applied at the rate of N200 Р140 К100 kg / ha. When winter wheat was cultivated continuously for 11 years in a field after 3 years of alfalfa, its grain yield was higher in the first three years after alfalfa, regardless of the type and amount of fertilizer, and in subsequent years the grain yield decreased sharply. When 20 tons of manure is applied per hectare, the grain yield is 35.3 centner / ha compared to the yield obtained in the first year, 36.3 ts / ha at the rate of N200 Р140 К100 kg / ha, 32.0 centner / ha at the rate of N150 Р105 К75 kg / ha, in the absence of fertilizer at all, yielded 37.0 centner / ha. In the case of winter wheat with N180 Р125 К90 kg / ha application rate with mineral fertilizers, the average grain yield was 47.8 ts / ha in three years, while in the case of N180 Р125 К90kg / ha application rate with mineral fertilizers + 15 t / ha with organo-mineral compost, the average grain yield was 62.4 ts / hain three years, and only 14.6 centner / ha of additional grain yield was obtained compared to the variant in which only mineral fertilizers were applied. The protein content of winter wheat in the variant with the norm of mineral fertilizers N180 Р125 К90 kg / ha was 13.8%, the norm of mineral fertilizers N180 Р125 К90 kg / ha was + 15 t / ha with the use of organo-mineral compost - 14.6%. was found to be 0.8 per cent higher than the variant in which only mineral fertilizers were applied. It was also noted that the gluten content in the grain was 0.9% higher under the influence of compost, varying in the above order among the options. Rice and wood chips-25%, manure-25%, chicken manure-35%, phosphogypsum-15% were added to prepare compost to determine the effect of semi-rotten black manure, nitrogen, phosphorus and potassium fertilizers on winter wheat yield and soil fertility. According to the experimental data, the grain yield of winter wheat was 51.2 centner / ha in the control variant of mineral fertilizers N200 Р140 К100 kg / ha, while the norm of mineral fertilizers N200 Р140 К100 kg / ha was 10 + t / ha in compost. A grain yield of 59.5 centner / ha was obtained, which was 8.3 ts / ha higher than the control option. The norm of mineral fertilizers N200 Р140 К100 kg / ha + 10 t / ha of black manure yielded 58.1 centner / ha of grain, which is 6.9 ts / ha higher than the control variant. In addition to the norm of mineral fertilizers N200 Р140 К100 kg / ha, in the variants using 20 t / ha of black manure and compost, an additional grain yield of 9.5-11.4 centner / ha was obtained compared to the control variant. Soybeans grown as a secondary crop were treated with nitragin before sowing the seeds, and 56.6-58.4 t / ha of soybeans were harvested from winter wheat grown by using mineral fertilizers N30 Р90К60 and N60 Р90К60 kg / ha. Grain yield was 54.5-56.7 t / ha from winter wheat grown by application of mineral fertilizers N30 Р90К60 and N60 Р90К60 kg / ha without treatment with nitragin before sowing the seeds. Before sowing the seeds of soybeans grown as a secondary crop, 48.2 ts / ha of grain was obtained from the cultivated variant of winter in whichthere was not treated with nitragin and mineral fertilizers.