黄土丘陵区不同生长年限刺槐林土壤无机磷的变化规律  

Changes of inorganic phosphorus in the soils covered with Robinia Pseudoacacia with different growing period of in the loess hilly area

作　　者：苏少华[1] 刘合满[1] 董丽娜[1] 张晋爱[2] 张兴昌[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]朔州职业技术学院,山西朔州036002

出　　处：《干旱地区农业研究》2008年第3期171-175,共5页Agricultural Research in the Arid Areas

基　　金：国家科技支撑计划(2006BAD09);教育部科研创新团队支持计划

摘　　要：利用时空互代法,在野外调查和室内分析的基础上,探讨了生长2、16、24、27、30和43 a(恢复年限)刺槐林土壤无机磷的变化规律。结果表明:随年限延长,刺槐林地土壤全磷和无机磷含量呈减少之趋势,除Ca10-P表现为明显的下降趋势外,其他无机磷组分均随恢复年限的延长呈总体增加趋势;不同恢复年限内,刺槐林地土壤无机磷组分含量和比例有如下顺序:Ca10-P>Ca8-P>Fe-P>Al-P>Ca2-P。The time-space substitute method was used to discuss the changes of inorganic phosphorous in the woodlands covered with Robinia pseudoacacia of 2, 16, 24, 27, 30 and 43 years of growing period respectively on the basis of field investigation and laboratory analysis. The results indicate that with the extension of growing period, both the contents of total amount of total-phosphorous and inorganic phosphorous in the woodland covered with Robinia pseudoacacia decreased, and the content of Ca10 - P showed significant decrease, on the contrary, other inorganic phosphorus fraction increased; while in the soils that covered with Robinia pseudoacacia of different growing period, the content and proportion of inorganic phosphorous fraction maintained following order as： Ca10 - P〉Ca8 - P〉Fe - P〉Al - P〉Ca2 - P.

关 键 词：年限 无机磷 刺槐 

分 类 号：S154.4[农业科学—土壤学]