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在不同种植密度条件下 ,以半冬性小麦豫麦 49为试验材料 ,研究了叶面喷施GA3、PP3 3 3、6-BA对旗叶衰老过程中MDA含量及小麦产量构成的影响。结果表明 :低密度处理有效地减缓了旗叶衰老 ,提高了千粒重和穗粒数 ;植物生长调节剂以不同的方式调节小麦旗叶的衰老 ,影响小麦产量性状 ,其中PP3 3 3和 6-BA能较好地协调产量构成因素间的关系 ,提高作物产量 ,GA3增产效果不明显。在高密度处理中 ,PP3 3 3能改善产量性状。从总体效果看 ,基本苗 1 0 5万 hm2 与PP3 3 3相结合为较为适宜的处理组合
Under different planting densities, semi-winter wheat Yumai 49 was used to study the effects of foliar spray GA3 and PP3 3 3,6-BA on MDA content and wheat yield during flag leaf senescence. The results showed that low density treatment effectively slowed the senescence of flag leaves and increased the 1000-grain weight and grains per spike. Plant growth regulators regulated the flag leaf senescence in different ways and affected the yield traits of wheat. Among them, PP3 3 3 and 6-BA Can better coordinate the relationship between yield components, improve crop yield, GA3 yield effect is not obvious. In high-density processing, PP3 3 3 can improve yield traits. In view of the overall effect, the combination of the basic seedlings of 105 000 hm2 and PP3 3 3 is the more appropriate combination of treatments