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1978年我场栽培的5万多亩大豆,90.7％进行了化学除草,1979年大豆化学除草面积达到99％。两年来,我场主要是采取播后苗前带状喷药与出苗后机械行间管理相结合的方法,使大豆管理基本上不用人工铲地,不用机械耙草,有效地消灭了杂草,保住了全苗。在1978年8月23—28日大豆成熟以后调查,化学除草的大豆,每平方米有残留杂草1—3株,大豆1,184粒,亩产239斤,而未施药的对照面积,每
In 1978, we cultivated 50,000 acres of soybean, 90.7% conducted chemical weeding, and 1979 weed chemical weed area reached 99%. In the past two years, our field mainly adopted the method of combining strip-shaped spraying of seedling with the management of post-emergence mechanical intercropping so as to make soybean management basically without manual shoveling and without mechanical raking grass to effectively eliminate weeds, Keep the whole seedlings. After the maturity of soybean on August 23-28, 1978, the chemical weed control soybean has 1 to 3 strains of residual weeds per square meter, 1,184 soybeans and 239 kg mu yield, while the control area without pesticide application