Влияние нормы минералъных удобрений на озимую пшеницу возделываемой после повторных культур

Аннотация

Subjects of research: meadow-planting soil of Fergana region, repeated crops, measures of fertilizers, «Croshka» sort of winter wheat. Purpose of work: To study the influence of nutrient elements of the root and reap rests of repeated crops and winter wheat cultivated after the repeated crops depending on the used measures of mineral fertilizers for the furtility of soil and the determination of crop capacity under the conditions of meadow-planting soil of Fergana valley. Methods of research : Phonological observations and accountings in the field tests were carried out accountinfs to the «Method of State test of quality agricultural crops» (Moscow, Kolos, 1964). Agrichemical analysis of the soil and plants, agriphysical investigations according to «Method of agrichemical and microbiological investigations in the districts requiring irrigation» (Tashkent, 1963). The results obtained and their novelty: On the conditions of meadowplanting soil the crop capacity of the repeated crop made up average for the thee years: grain of crop-38,4 centner/ hectare, siol mass 307,3 centner/ hectare, lentil-accordingly 15,2 and 32,2 centner/ hectare, bean-12,7 and 12,3 centner/ hectare, soy-bean-23,3 and 33,5 centner/ hectare The greatest crop of grain of winter wheat (grown after the repeated crop) was taken 60.3 centner/ hectare, by applying N-150, P2 Os-105, K2O -75 rg/ hectare after the lentil. Practical value: Recommendations were given to the production on the basis of findings on the conditions of meadow-planting soil. With a view of increasing fer-tility of soil and productivity of crops it is necessary to cultivate in the capacity of repeated crop of lentil, bean and soy-bean after winter wheat using the measures of fertilizers N-150, P2 Os-105, K2O-75 kg/hectare Degree of embed and economic effectivity: The technology of cultivating of the repeated crops and winter wheat by means of using fertilizers on the measures N-150, P2 O5-IO5, K2O -75 kg/ hectare on the area of 400 hectare on the conditions of Fergana region. The greatest conditionalpurc income by growing the repeated crops was taken. By winter wheat grown after the lentil (284315 soum/htctarc, profitableness made up 45,8% applying N-150, P2Os-105, K2O-75 kg/ hectare). Field of application: Specialized farming economy on the calculation of winter wheat.