摘要
通过野外考察与室内分析,研究宁南山区不同植被恢复措施的土壤养分效应,结果表明:在宁南山区恢复植被能显著提高土壤有机质和速效氮、钾等营养元素的含量,降低土壤pH,增加土壤保肥性能;随林龄增加,土壤养分状况明显改善。植被对土壤的培肥改良是一种正向持续反馈机制,植被恢复时间越长,效益越显著。
Based on field investigation and indoor analysis,we studied the effect of different vegetation restoration on soil nutrients in southern Ningxia mountain region.The result showed that:recovering vegetation can improve remarkably the content of soil organic matter and available N,K etc.,and drop soil pH,enhence the conservative capability of soil nutrient.Vegetation fertilized and ameliorated soil mechanism is a right direction of abiding feedback,the longer time and more benefits.
出处
《西北植物学报》
CAS
CSCD
2003年第8期1429-1432,共4页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金项目(40271074)
西北农林科技大学科研专项基金项目
关键词
宁南山区
植被恢复
土壤养分
Southern Ningxia
vegetation restoration
soil nutrient
