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讷河市地处松嫩平原北部,是黑龙江省大豆主要产区之一,历年播种面积10万hm~2。1992年以来,由于受农产品销售市场的影响,大豆种植面积逐年增加。据统计,1994-1998年全市大豆平均年种植面积为13.9万hm~2,较历年增加39.5%。其中,重茬大豆占34.7%,迎茬大豆占53.5％,大豆的产量和品质明显降低,制约了大豆生产的稳定健康发展。从1994年起,我们实施了“控制重迎茬大豆减产技术攻关”项目,1995年列入了国家“九
Nehe City, located in the north of Songnen Plain, is one of the main producing areas of soybean in Heilongjiang Province, with annual sown area of 100,000 hectares. Since 1992, due to the influence of agricultural product sales market, soybean acreage increased year by year. According to statistics, from 1994 to 1998, the average annual planting area of soybean in the city was 139,000 hm 2, an increase of 39.5% over the previous year. Among them, 34.7% of reclaimed soybeans and 53.5% of soybean were in stubble crop, and the yield and quality of soybean were obviously reduced, which hindered the stable and healthy development of soybean production. Since 1994, we have implemented the project of “Controlling the Production of Soybean Reducing Crops”, and in 1995, it included "