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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。
Weedy rice caused by the loss of cultivated rice yield is mainly the competition between the leaves. Competition for space, highlight the contradictions of light. Weedy rice main stem leaves more than cultivated rice, the largest leaves longer than cultivated rice, the largest leaves wider than cultivated rice, leaf loose, shaped like hybrid rice. If 2.5 kg of japonica weedy rice seeds were inoculated on 667 m2 dry and direct seeding rice fields, the upper part of the cultivated rice was covered by weedy rice leaves. The cultivated rice plants were thin yellow, weak, and stems and tillers gradually degenerated and died, resulting in the basic absolute production.