论文部分内容阅读
我州地处西北内陆中纬度地带,青藏高原的边缘,平均海拔3000公尺以上,年平均气温约4℃,年降雨量为500～800毫米,属高寒阴湿地区。野燕麦是我州农田主要恶性杂草之一,分布广、危害面积大(主要发生在青稞、小麦田中),约占全州粮食播种面积的80％。由于野燕麦的危害,一般减产30～50％。为了逐步控制和消灭野燕麦,我们对防除野燕麦有效的8种化学除草剂进行了药效试验。试验在合作地区本所农场进行。合作地区海拔2936米,1980年无霜期65天,年降雨量374.5毫米,年平均气温2.3℃。参加试验的除草剂共8种(见表
My State is located in the mid-latitude of the inland northwest, the edge of the Qinghai-Tibet Plateau, the average elevation of 3,000 meters above the average annual temperature of about 4 ℃, the annual rainfall of 500 to 800 mm, is a cold and humid alpine regions. Wild oats is one of the major malignant weeds in farmlands in our county. It is widely distributed and has a large area of harm (mainly in barley and wheat fields), accounting for about 80% of the grain sown area in the state. Due to the damage of wild oats, the general reduction of 30 to 50%. In order to control and eliminate wild oats step by step, we tested the effectiveness of eight chemical herbicides against wild oats. The trial was conducted on our own farm in the cooperative area. Cooperation area 2936 meters above sea level, frost-free period in 1980 65 days, the annual rainfall of 374.5 mm, the annual average temperature of 2.3 ℃. Participate in the test of a total of 8 kinds of herbicides (see table