论文部分内容阅读
飞播造林,是我省荒山造林绿化的重要手段。每年飞播面积几百万亩,松种供不应求。但松种飞播后,鼠鸟取食十分严重,据省林业厅营林处调查其取食率达50%。我们在实地调查中也发现,在一些地方,飞播后有70—80%松种被鼠、鸟吃掉,严重地影响造林成活率。如能减少鼠鸟大量取食松种,就可以减少单位面积的播种量,降低造林成本,扩大播种面积,缓和松种的供求紧张状况,对加速荒山绿化,具有一定的实际意义。在国外,用异狄氏剂——福美双拌种防
Aerial seeding afforestation, afforestation afforestation in our province an important means. Annual fly-sowing area of several million mu, pine species in short supply. However, after the flight of the pine species, the birds and rats eaten very seriously. According to the survey conducted by the Forestry Department of the Provincial Forestry Department, the feeding rate reached 50%. In our field investigations, we also found that in some places, 70-80% of pine seeds are eaten by rats and birds after flight, seriously affecting the survival rate of afforestation. If you can reduce the bird feeding a large number of pine, you can reduce the sown area per unit area, reduce the cost of afforestation, expand sown area, easing the pine species supply and demand tension, accelerate the afforestation, has some practical significance. Abroad, with endrin - double the United States and the United States mixed seed