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上海市嘉定区夏播作物以水稻为主，种植面积约占耕地总面积的７５％。为正确及时地掌握本地区水稻不同种植方式农田杂草的发生危害和种群动态，科学地制定除草方案，全面控制杂草危害，作者开展了本研究。１调查方法１.１调查点的确定据本区耕作制度和土壤性质，选择安亭、封浜
The summer sowing crops in Jiading District of Shanghai are mainly rice, and the planting area accounts for about 75% of the total cultivated land area. In order to correctly and timely grasp the occurrence and damage of weeds in different planting methods of rice in this region and the population dynamics, scientifically formulate weeding programs and control the weed hazards comprehensively, the author carried out this study. A survey method 1.1 survey to determine the location According to the farming system and the nature of the soil, select Anting, Feng Bang