Effects of Different Intercropping Models on Wheat Aphids and Their Predator Commuunities

doi:10.3321/j.issn:1000-7091.2007.01.033

Abstract

Abstract: Based on the dynamic analysis of community structure characteristics, the effects of different intercropping models on wheat aphids and their predators were studied in this paper. Three intercropping models were used: Model Ⅰ: wheat intercropping tonka-beans; Model Ⅱ: wheat intercropping cole; Model Ⅲ: monoculture of wheat. The results showed that the richness of predators and the stability of insect communities ranked as follows: Model Ⅰ>Model Ⅱ>Model Ⅲ. The most stability of wheat aphid sub-communities and predator sub-communities were detected in wheat intercropping tonka-beans field and in monoculture wheat field, respectively. The other characteristics of wheat aphid sub-communities ranked as follows: Model Ⅰ> Model Ⅲ>Model Ⅱ for Diversity index and evenness, and Model Ⅱ>Model Ⅲ>Model Ⅰ for Dominance and Dominant concentrations. For predator sub-communities, Model Ⅲ>Model Ⅱ>Model Ⅰ for diversity indexes and evenness, and Model Ⅰ>Model Ⅱ>Model Ⅲ for dominance and dominant concentrations.

Key words: Wheat, Intercropping, Wheat aphid, Predator, Community

CLC Number:

S512.01

LI Su-juan, LIU Ai-zhi, RU Tao-qin, WU Yu-qing, HAN Song. Effects of Different Intercropping Models on Wheat Aphids and Their Predator Commuunities[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(1): 141-144. doi: 10.3321/j.issn:1000-7091.2007.01.033.

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