Влияние питание на рост, развитии и продуктивность риса возделиваемого путем рассады в условиях Ферганской далины

Аннотация

Objects of research: Meadow and meadow swamp soils for sowing rice as double crops after winter wheat and for regular rice growing; mid ripening sort of “Avangard” and early ripening sort of “Ak kiltik” related to “Barley type rice”, NPK, mineral fertilizer. Purpose of work: Scientific - practical substantiation the influence of nitrogenous nutrition rates on growth, development, productivity and economical efficiency of rice sown on stubble remains in Fergana valley. Methods of research: Experiments, phenological survey and, soil and plant samplings were conducted on the basis of “Methodics of Field Experiments” (Dospekhov 1985) and “Methodics of State Variety test for agricultural crops” (1964). Economical efficiency of growing rice as double crops were evaluated by the Method of “Methodics of economical evaluation for experimental variants in rice growing” (V.N.Polojiy 1976). The results obtained and their novelty: In Fergana valley, the optimal nitrogenous fertilization rates of growing mid ripening sort of “Avangard” and perspective early - ripening sort of “Ak kiltik” as a seedling method were determined first in fields only for rice growing use. As well, there scientific -practical pases of 60-70 centner (100 kg) / ha and more harvest achievement were created. Practical Value: There were determined that nitrogenous fertilizer rates would be advisible with 90 kg/ha rate in the new regionalized biological earlyripening sort of “Ak kiltik” in the 120 kg/ha of phosphorus and 150 kg/ ha of potassium applied variant, and 120 kg/ ha rate in the mid ripening sort of “Avangard”. At those optimal rates, there were proved the rise of shrubbing coefficient average 1.1-1.5 ha, increase of fertile stem number average 63-83 thousand per hectare, 56.6-74.5 centner /ha of productivity formation, improvement of grain quality, and exceed of elite grain and whole grain out put from 90 percent. Degree of embed and economic effectivity: The optimal fertilization rate providing high yield achievement in growing rice by the seedling method was applied in 570 hectare area includind 300 hectare in Andijan, 200 hectare in fergana and 70 hectare in Namangan. Conditional net profit formed 10740350 soum/ha in the Ak kiltik sort and 7786650 soum/ha in the Avangard sort. Field of application: Farming economies specialized in rice growing in Fergana valley.