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三棱草(Scirpus trigueter L.)是库尔勒地区危害严重的稻田杂草,据在英下乡调查,一亩地内分布的球茎重92.43公斤,地下匍匐枝连接起来长达七公里半.在它的影响下,水稻表现为苗叶黄化,成熟延迟.如不进行防治,单株产量减轻0.13克,千粒重减轻1.1克,茎桿与谷粒的比例增大1.15倍,而产量仅为已进行防除工作稻田的46.7%.1958年曾就其生活习性进行观察,并试拟相应的防除措施,结果如下:
Scirpus trigueter L., a severely weedy rice weed in the Korla region, reported 92.43 kilograms of bulbs distributed on an acre of land, with underground stolons connecting up to seven and a half kilometers. In its Under the influence of rice seedlings yellow, maturation delay.If not prevention and control, yield per plant reduced 0.13 grams, 1.1 grain weight reduced 1.1 grams, the ratio of stalks and grains increased 1.15 times, and only the production has been controlled 46.7% of the working paddy fields. In 1958, they observed their habits and tried to draw up corresponding measures for prevention and control. The results are as follows: