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报道了双穗雀稗在水稻田中的生长情况及对水稻生长发育的影响 .试验结果表明 ,该杂草每株主茎分枝数平均 63.7个 ,主茎长平均 2 .67m.在早稻生长前期 ,该草对稻分蘖影响不明显 ,主要在稻分蘖盛期以后 ,降低稻的分蘖成穗率及结实粒数 .在 (1～ 5株 ) / m2范围内 ,每株双穗雀稗可使水稻减产约 1 0 %～ 1 3% .提出了防治措施
Reported the growth of barnyardgrass in paddy field and its effect on the growth and development of rice.The results showed that the number of main stem branches per plant was 63.7 and the average length of main stem was 2.67m.In early stage of early rice growth, The grass had no significant effect on the tillering of rice, which mainly reduced the tillering rate and grain number of tillers after the tillering stage of rice. Within the range of (1 ~ 5 plants) / m2, Reduction of about 10% ~ 13%. Preventive measures