【摘要】 对太谷地区枣园生态系统中主要害虫、天敌的时间、空间生态位及不同营养层物种间竞争进行了调查研究。结果表明 ,在利用相同资源的物种中 ,存在着程度不同的生态位重叠和种间竞争现象。枣园间作物(或杂草的有无 )和用药与否对时间生态位的宽度有明显的影响 ,但对生态位重叠与种间竞争的大小以及空间生态位的宽度没有影响 ;明确了害虫与天敌在时间与空间序列上的分布变化规律 ,为枣树害虫的综合生态调控提供了科学依据更多还原

【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.更多还原