半干旱地区品种、密度及叶面调控技术对大豆产量的影响

采用裂一裂区设计，研究了半干旱地区3个大豆品种、3种种植密度、8种叶面调控方法对大豆产量的影响，旨在为半干旱地区大豆高产调控技术提供理论依据。试验结果表明：品种和密度极显著地影响大豆产量；密度和化学调控技术的互作对大豆产量也产生了影响，但未达到显著水平；促进型调节剂与营养型叶面肥配合施用可显著提高大豆产量；叶面调控效果在不同品种、不同密度下存在差异，叶面调控技术对垦农4号或非正常密度（低密度及高密度）下大豆产量的调控效果达到显著水平。

Effect of varieties, densities and leaf regulation technology on soybean yield in semi -drought area

To better understand soybean high - yield regulation technology in half - drought area, the effect of three soybean varieties, three plant densities and eight leaf regulation technologies on soybean yield by split - split plot design were carried out in half - drought area. The results indicated that soybean variety and plant density affected soybean yield very significantly. The interaction of density and chemical regulation technology had important effects on soybean yield, although not significantly. Combining promoting -type plant growth regulator with foliar fertilizer could improve soybean yield very significantly. The effects of leaf regulation in different varieties and different densities were different, the regulatory effects on soybean yield by leaf regulation technology was significant in Kennong 4 with unconventional plant density （ low - density or high - density）.