Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2003, Vol. 39 ›› Issue (5): 78-86.doi: 10.11707/j.1001-7488.20030512

Previous Articles     Next Articles

THE NICHE OF IMPORTANT PESTS AND NATURAL ENEMIES AND COMPETITION AMONG THE SPECIES IN JUJUBE ORCHARD ECOSYSTEM

Shi Guanglu,Xi Yinbao,Wang Haixiang,Li Zhenyu,Xia Naibin   

  1. Department of Plant Protection, Shanxi Agricultural University Taigu030800;Beijing Forestry University Beijing100083
  • Received:2002-09-06 Revised:1900-01-01 Online:2003-09-25 Published:2003-09-25

Abstract:

The niche and competition among species of natural enemies and pests in different intercropped and managed jujube orchard ecosystems in Taigu were studied. The results showed that there were obvious niche overlaps and competitions in different species which used the same resources. The niche overlaps competition among species and spatial niche width were not disturbed by insecticide,weeds and intercropped plants. Time niche width was affected by insecticide, weeds and intercropped plants. The laws of distribution, and changes of natural enemies and pests in time and space were revealed by niche studies.

Key words: Jujube orchard ecosystem, Pest and natural enemies, Niche, Competition