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应用同位素示踪和大豆结瘤(R_π) 不结瘤(r_π)等位基因系进行氮磷施肥生理基础研究,明确了大豆生育早期主要利用土壤氮和肥料氮,中后期主要利用共生固氮。大豆生育后期由营养器官向籽粒转运的氮素,转运率为50%左右,磷素转运率比氮素高10-20%,合理施用氮肥能够促进豆株对土壤氮的吸收,激发率达1.535-1.778。试验认为早期施用少量氮肥对大豆生育有利,氮磷比以1∶2或1∶3为佳。在135亩中等肥力土壤上连续4年亩产达152-200kg以上。同时研究了夏大豆高产生育指标和9项配套栽培技术。
Application of isotope tracing and r_π non-nodulation (r_π) allele in nitrogen and phosphorus fertilizers physiological basis, clear early soybean growth and utilization of soil nitrogen and fertilizer nitrogen, the main use of symbiotic nitrogen fixation. Nitrogen translocated from vegetative organs to grain during late growth period of soybean was about 50%, and phosphorus translocation rate was 10-20% higher than that of nitrogen. Reasonable application of nitrogenous fertilizer could promote the absorption of soil nitrogen by soybean plant with an excitation rate of 1.535 -1.778. Tests that early application of a small amount of nitrogen fertilization of soybean beneficial, nitrogen and phosphorus ratio of 1: 2 or 1: 3 is better. In 135 acres of moderate soil fertility for 4 consecutive years of output of 152-200kg or more. At the same time, it studied the index of high yield and yield of summer soybean and nine supporting cultivation techniques.