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- W2382767889 abstract "On sloping field in Mao County, Sichuan, farmers developed simplified Sichuan pepper(Zanthoxylum avicennia) systems by cleaning up weeds. During growing seasons, several field surveys on complex system (Sichuan pepper plantation system with weeds) and monoculture system (Sichuan pepper plantation system without weeds) were conducted and some related ecological factors of the two systems were compared. Field measurements were carried out to elucidate the trends in growing situation, soil water content, plant diseases and insect pests in the two systems, and to evaluate rationality of the monoculture system. The results showed that in monoculture system, height, base diameter and canopy size of Sichuan pepper were significantly better than those of complex system, but diseases and insect pests seemed more prevalent in monoculture system, which also received increased fungicide applications when compared to the complex system. Soil water contents in the two systems were both increasing with the increase of soil depth, but their difference was great. The soil water content in complex system stably ranged from 7.59% to 23.79%, while that in monoculture system varied greatly and ranged from 4.73% to 49.72%. Soil water content in complex system was much higher than that of monoculture system. There were a similar tendency in insect species, and species richness, diversity and evenness. Our surveys revealed that the monoculture system exhibited lower number of species of predators and parasites, and correspondingly higher density of aphids than the complex system. These results indicated that accelerating rates of Sichuan pepper insect pests and diseases might be increased due to lack of habitat and resources for natural enemies or to a concentration of preferred host plants for specific pathogens and herbivores. Therefore, weeds played an important role in Sichuan pepper agro-forest systems. This study suggests that monoculture system may be more productive, but such gains occur at the cost of biodiversity and agricultural sustainability, reflecting higher pest vulnerability. Tab 3, Ref 9" @default.
- W2382767889 created "2016-06-24" @default.
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- W2382767889 date "2005-01-01" @default.
- W2382767889 modified "2023-09-24" @default.
- W2382767889 title "EFFECT OF SIMPLIFIED AGRO-FOREST SYSTEM OF SICHUAN PEPPER (ZANTHOXYLUM AVICENNIA) ON SOME ECOLOGICAL FACTORS" @default.
- W2382767889 hasPublicationYear "2005" @default.
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