干旱胁迫对玉米雌穗生长发育和产量的影响

Effect of Drought Stress on Growth and Development of Female Inflorecence and Yield of Maize

干旱胁迫使玉米雌穗生长发育受到抑制 ,雌穗变短变细 ,总的基础物质不足 ,最终导致产量下降。对干旱胁迫导致玉米子粒产量下降幅度的测定结果表明 :不同时期干旱胁迫处理的减产幅度为开花期 >抽丝期≈抽雄期≈孕穗期 >灌浆期 >拔节期 。

Drought stress hindered the growth and development of female inflorescence in maize,including shorted length,thinned diameter,the total basic matter was not enough,and eventually the maize could not give higher yield. The yield reduction scale at different stages in different drought stress treatments was anthesis>silking≈tasseling≈booting>filling>jointing.The reduction of grain weight on the drought stressed plants was caused by the decrease of linear rate of kernel filling and the shortation of duration of kernel filling.