In order to investigate the effects of different irrigation patterns on root growth and water use efficiency of maize and the differences among genotypes,the field and rain-out shelter experiment with different genotypes of maize (hybrid Hudan 4 and its parents 803 and Tian 4)were carried out.The result showed that hybrid maize Hudan 4 existed marked heterosis in root growth,root profile distribution and water use efficiency.The root length density of hybrid maize Hudan 4 was higher than that of its parents...
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