摘要
经５年的定位试验，结果表明：稻田年内水旱轮作（二水一早的麦＝玉米－稻）的晚稻产量比连作（一旱二水的麦－稻－稻）晚稻产量显著增加，增产幅度为６．５４％～１５．８７％，平均为１０．７５％，其增产的原因主要是稻田年内水旱轮作不仅可促进晚稻分蘖早、分蘖快、数量多，从而使有效穗明显增加；而且还促进叶面积的扩展并使叶片叶绿素含量增加，延缓后期衰老，使干物质积累明显增加，从而使每穗粒数明显增加。
Through five years′ research of experiment lacated in the same paddy, the results showed that the yield of late rice in yearly rotation of barley corn rice was significantly higher than it of late rice in barley rice rice, the range of increased yield from 6.54% to 15.87% with average of 10.75%.The reason for this is mainly that there is a evident residual in yearly ratation of barley corn rice.It can accelerate the tiller of late rice emergence early,quick and more,then effective panicles were significantly increased;it can accelerate the extansion of leaf area and increse of chorophyll content and slow down the spead of senescence in late stage of growth,then significantly increase the accumulate of dry matter and the number of grain per panicle;Meanwhile it can make the late rice in yearly rotate of barley corn rice have the same ripened grain rate and 1000 grain weight as the late rice of barley rice rice.
基金
国家自然科学基金
关键词
轮作
晚稻
产量
生长发育
cropping rotation
late rice
yield
mechanism
