关键词: 磷库, 有效磷, 华西雨屏区, 人工植被类型

Abstract: [Objective] We aimed to understand the characters of soil Phosphorus(P) pool under several planted vegetations in the Rainy Area of West China, and to analyze the effects of planted vegetations on soil P pool and its availability. [Method] Seven representative vegetations were selected including orange cut-over plantation, orange plantation, eucalyptus plantation, corn farmland, camphor plantation, grapefruit plantation and peach plantation. Soils were sampled in the plough layer or root layer and plough pan or under-root layer in July 2010. Soil P content and available P content were analyzed and soil P pool was calculated. [Results] Significant effects of planted vegetation were observed on soil P pool, but the effects were different under different vegetations. Soil P pools were higher in plough pan or under-root layer than in plough layer or root layer under eucalyptus plantation and corn farmland. Compared with other vegetations, orange plantation showed the highest soil P pool in root layer, but corn farmland displayed the highest one in plough pan. In addition, although corn farmland had higher soil available P content in plough layer, camphor plantation had the highest soil available P content in under-root layer. [Conclusion] The results were suggested that the variations in plant growth and human management might be two key reasons influencing soil P characters in different plantations, which can provide some efficient data for regional land use and environment construction.

Key words: P pool, available P, Rainy Area of West China, planted vegetation