Models for the peak value of mixed grasshopper population density in Ganjia of Gansu,China

摘要：

The Ganjia high mountain grasslands of Xiahe County are an important pastoral area of Gansu Province in the Peoples Republic of China.Grasshopper outbreaks of serious proportion occur here almost every year,and these grasslands are already fragile due to degradation caused mainly by overgrazing.This study used 1993‐2003 survey data to re‐evaluate the hypothesis for developing an accurate grasshopper predication model and analyzed the relationships between grasshopper occurrence and meteorological factors.Nonlinear models have been used for estimating peak values of mixed grasshopper population density.

关键词： Xiahe Ganjia grasshopper population density peak value model

作者: Liu X N Zhang D G Jiang W L

作者单位: Grassland Science College,Gansu Agricultural University,Lanzhou 730070,China

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）