水土保持学报2013，Vol.27Issue(4)：247-251,257,6.
宁南山区植被恢复对土壤团聚体特征及腐殖质分布的影响
Effects of Re-vegetation on Characteristics of Soil Aggregates and Humus in Soil Aggregate in Loess Hilly Region of Southern Ningxia
摘要
Abstract
Based on field investigation and analysis in the laboratory,the effects of different re-vegetation types on the aggregation and stability of soil aggregates in loess hilly region of southern Ningxia were studied,and humus in soil aggregate were studied as well.The results showed that:Characteristics of soil aggregate from wet-sieving were as follows,R0.25 was between 53.2％ and 71.3％,MWD was between 1.98 and 2.59,GMD was between 0.96 and 1.14,fractal dimension was between 2.70 and 2.83.R0.25,MWD and GMD from dry-sieving were followed in this order:Natural grassland was the biggest,15-year-old and 25-year-old Caragana korshinskii Kom.were the second,crop land was the smallest.After re-vegetation the content of soil humus was changed in 0.53～2.67 g/kg,content of soil humus in 1～0.25 mm diameter aggregate was higher than other diameter aggregates.The result of step-wise regression analysis showed that content of soil humus in 1 ～ 0.25 mm diameter aggregate influenced the aggregation and stability of soil aggregates.关键词
植被恢复/团聚体稳定性/腐殖质/宁南山区Key words
re-vegetation/ stability of soil aggregates/ humus/ loess hilly region of southern Ningxia分类
农业科技引用本文复制引用
朱秋莲,程曼,安韶山,薛志婧..宁南山区植被恢复对土壤团聚体特征及腐殖质分布的影响[J].水土保持学报,2013,27(4):247-251,257,6.基金项目
国家自然科学基金面上项目(41171226) （41171226）
新世纪优秀人才支持计划项目(NCET-12-0473) （NCET-12-0473）
西北农林科技大学"优秀青年人才"科研专项(QN2011049) （QN2011049）
