冀中南棉区棉花根系特征及与地上器官生长生理相关性研究

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本试验以转基因抗虫棉农大棉8号为材料,在大田条件下设置6个密度水平,并在其中两个密度水平设置2种整枝方式,共8个处理,采用根钻法研究了不同密度和不同整枝方式处理下根系的形态特征及不同生育时期根系与地上部器官的相关性,旨在探索大田条件下密度和整枝方式对棉花根系生长分布的影响规律。同时还对不同密度和整枝方式处理下棉花伤流液重量、伤流液中营养元素的含量和伤流液与土壤水分的关系作了分析。试验结果表明:1.不同密度处理下,棉花0-60cm土层内根系总干重及总长度随生育进程的推进逐渐增加,1.5-8.
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