【摘要】 本文对以垅作双条播分层施肥为主体的大豆“三垅”高产栽培配套技术进行了单项分解比较试验分析，并着重从保护性施氮的观点讨论了大豆结瘤和固氮状况，为总结大豆“三垅”高产栽培经验以及进一步完善和提高其配套技术水平提供科学依据。更多还原

【Abstract】 ″Ridge Three″culturee proctices can create good soil environment for the development of soybean symbiotic nitrogen fixation system. Under the condition of the″Ridge Three″culture proctices, applicating nitrogen fertilizer at normal level can cause damage to the development of symbiotic nitrogen fixation system, so the econormic effect can not reach the expected level. Adapting the applied technology, the protective application of nitrogen fertilizer, can accelerate the development of soybean symbiotic nitrogen fixation system, regulate the soybean′s demand for the symbiotic nitrogen and the soil (fertilizer) nitrogen and can decrease the application quantity of nitrogen fertilizer, at last, can reach the effect of high yield, high nitrogen fixation and high economic ffect.更多还原