杂草稻与栽培稻叶片生长的竞争性研究

Study on competitiveness of leaf growth of weedy rice and cultivated rice

杂草稻造成栽培稻产量的损失主要表现为叶片间的相互竞争。争夺空间、争夺光照矛盾突出。杂草稻主茎叶片多于栽培稻,最大叶片长于栽培稻,最大叶片宽于栽培稻,叶片披散,形似杂交稻叶。如果在667 m2旱直播稻田接种2.5 kg粳性杂草稻籽,栽培稻上部全被杂草稻稻叶覆盖,栽培稻植株瘦黄、弱小,茎、蘖逐步退化消亡,造成基本绝产。

Growth competition of space and illumination between weedy rice and cultivated rice resulted in yield loss. And weedy rice with more, longer and wider leaves appeared like hybrid rice. 2.5 kg weedy rice seeds planted in directed seeding field of 667 m^2 made cultivated rice abnormal grow and led to entire yield loss.