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黑龙江省北安市地处小兴安岭西南麓,总面积719,313平方公里,市属耕地面积156万亩。由于本市为全国重点商品粮生产基地,近年农业生产发展很快,年产粮3—3.3亿公斤。当前农作物杂草危害较重,虽经大力防治,每年草害面积在50—70万亩,损失粮食百万公斤。经调查,旱田杂草,包括大豆田,主要有稗草、金狗尾草、反枝苋、苦苣菜、问荆、野燕麦等10余种;水田杂草因种植年限不同差异较大,主要有稗草、异型莎草、雨久花、水绵等10余种。
Bei’an City, Heilongjiang Province is located in the foothills of the Little Xing’an Mountains, with a total area of 719,313 square kilometers, the city belongs to 1.56 million mu of cultivated land. As the city is a national key commodity grain production base, agricultural production has developed rapidly in recent years, with an annual output of 3-3.3 billion kilograms of grain. At present, weeds in crops are harmed hardest. Despite vigorous prevention and control, the annual area of weeds is between 50 and 70 million mu and millions of kilograms of grain are lost. After investigation, weeds in weeds, including soybean fields, mainly have more than 10 species of barnyardgrass, golden foxtail, Amaranthus retroflexus, Sonchus, wild oats, etc. The weeds in paddy fields vary widely in different planting ages, Grass, Shaped sedge, rain long flowers, sponges, such as more than 10 species.