摘要
以野外实测为基础，应用统计学方法，探讨了天山北坡中段草场蝗虫虫口密度与草场产量的关系，并依此建立了半荒漠草场意大利蝗虫危害防治的经济阈值，即69头／m23令前意大利蝗虫。
On account of field mouitoring data,using statistics method,the relation between population density and output of grasslandin middle section of north slope of Tianshan Mountains was founded,and the econmical threshold value of Italy Locust-Pre-vention in semi-desert grassland was calculated,or 13(Italy Locust under three-old-years)/m3.
出处
《干旱环境监测》
北大核心
1998年第3期158-160,共3页
Arid Environmental Monitoring
