通过三峡地区旱坡地田间定位试验,研究了柑橘园中3种植物篱对水土流失、土壤有效氮磷及柑橘生长的影响.结果表明,植物篱处理能显著减少水土流失,百喜草、黄花菜及花生3种植物篱处理的水土流失量均比无植物篱低,其中百喜草植物篱处理水土流失量最低;3种植物篱处理的土壤有效磷含量均高于无植物篱处理,但有效氮含量却低于对照,这主要是由于植物篱对N的吸收造成的;3种植物篱处理中柑橘长势均较无植物篱处理差,其中百喜草植物篱中柑橘长势最差,这表明植物篱与柑橘树对土壤养分有明显的竞争作用.%A long term fixed field experiment was conducted to investigate the effects of different hedgerows on runoff and soil losses, soil available N, P and the growth of citrus. Results showed that hedgerows significantly reduced runoff and soil loss. Runoff and soil losses of the treatments with different hedgerows were all lower than that of CK treatment (No hedgerows). The treatment with Paspalum notation hedgerows (PN treatment) showed the lowest runoff and soil losses. The soil available P contents of the three treatments with hedgerows were higher than that of CK, whereas the soil available N contents were lower than that of CK, and this was caused by hedgerows absorption of N. The citrus growth of treatments with hedgerows was inferior to that of CK, and the citrus growth of PN treatment was the worst among the three treatments with hedgerows, which indicated that there might be significant competition for nutrients between hedgerows and citrus.
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