我市大豆种植面积不断扩大，草害问题也日益突出，一般造成大豆减产１０％～２０％，严重者形成草荒，减产达９０％以上。为此笔者对全市大豆田杂草及防除技术进行了调查和研究，现汇报如下：一、杂草的优势种及分布概况由于受土壤理化性质、水系配套情况、种植习惯等因素的影 Soybean growing area in our city continues to expand, grass growing problems are also increasingly prominent, generally resulting in 10% to 20% reduction in soybean, severe cases of grassland shortage, cut production of more than 90%. To this end, the city of soybean weeds and control technology were investigated and studied, are reported as follows: First, the dominant species and distribution of weeds Due to the physical and chemical properties of the soil, water facilities, planting habits and other factors