吉林省几种主要稻田杂草对水稻子实产量的影响

本文研究了不同人工除草措施对水稻子实产量的影响。结果表明：（１）各种水田杂草对水稻的生育和单位面积子实产量影响很大。因此。拔除水田所有杂草可成倍地提高子实产量，（２）人工拔除稗草、雨久花和扁秆草也可大幅度地提高水稻产量，其效果与拔除所有杂草相同；（３）人工拔除稗草、雨久花和扁秆草中的任意两种，其增产效果要优于只拔除其中任意一种；（４）仅拔除雨久花或扁秆草可明显提高子实产量，但仅拔除稗草与不拔除草的子实产量差异不显著。

A STUDY ON THE PADDY-RICE FIELD MONOCHORIC KORSAKOWII REGAL ET MARCK IN THE SONGLIAO ECOLOGICAL DISTRICT

Investigation was carried out to study the harmfulness of paddy Monochoric korsakowii Regel at March on rice production in the Songliao Ecological District. It was found that this species harms rice plants. And the ways the plants of the weed emerges,develop,and grow were discribed.These will provide sound basis for the high grain yield of Paddy rice through weed control