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扁秆藨草是新洋农场稻田主要恶性杂草之一,它发生量大,范围广,常造成水稻大幅度减产。1987年我们对农场稻田的扁秆藨草发生情况进行了调查,並开展化学防除研究。一、新洋农场稻田扁秆藨草发生情况 (一)调查方法: 采用系统随机取样法,按全场稻田的三分之一面积进行抽样。调查时再根据扁秆藨草的发生密度分三个等级,12株/4尺~2以下为轻发生田块,12～39株/4尺。为中等发生田块,40株/4尺~2以上为重发生田块。轻发生田调查1/20面积,中等发生田调查1/15面积,
Stem Bream is one of the major malignant weeds in the Xin Yang farm paddy field. It occurs in a large amount and in a wide range and often results in a significant reduction of rice yield. In 1987, we conducted a survey on the occurrence of flat barnyardgrass on farm paddy fields and carried out chemical prevention and control research. First, the new ocean farm paddy flat barn grass Occurrence (a) survey method: using systematic random sampling method, according to the audience of one-third of paddy area area for sampling. According to the occurrence density of flat barbine, the survey was divided into three grades, 12 plants / 4 to 2 the following light occurred plots, 12 to 39 plants / 4 feet. For the mid-field plots, 40 plants / 4 feet ~ 2 above occurred as field plots. Light farmland survey 1/20 Area, medium field investigation 1/15 Area,