农业科学研究2026，Vol.47Issue(1)：31-38,8.DOI:10.13907/j.cnki.nykxyj.2026.01.004
宁夏南华山草地造林对土壤质量的影响
Effect of grassland afforestation on soil quality in Nanhua Mountain,Ningxia
摘要
Abstract
To investigate the ecological benefits of afforestation in mountainous grasslands and to clarify the impact of afforestation age on soil quality,this study examined the physicochemical properties and enzyme activities of the 0～40 cm soil layer in Qinghai spruce(Picea crassifolia)plantations of varying ages(10,20,and 30 years)and natural grassland within the Nanhua Mountain National Nature Reserve,Ningxia,China.It employed a minimum data set(MDS)and a soil quality index(SQI)to conduct a comprehensive evaluation of soil quality across different plantation ages.The results show that the overall soil quality in afforested areas is superior to that of natural grasslands and improves significantly with longer afforestation periods.Notably,soil pH,ammonia nitrogen content,alkaline phosphatase,alkaline protease,hydrogen peroxide,β-1,4-glucosinase,and sucras activities were higher in afforested areas compared to natural grasslands.Specifically,the 20-year afforestation site exhibited the highest total nitrogen and soil moisture content,while the 10-year site recorded the highest nitrate nitrogen content.Conversely,urease activity was significantly greater in natural grasslands than in all afforested sites.This study provides scientific evidence supporting the ecological benefits of grassland afforestation in mountainous regions,demonstrating that afforestation can effectively enhance soil quality and facilitate the recovery and improvement of ecosystem functions.关键词
草地造林/土壤质量/评价体系/造林年限/南华山Key words
grassland afforestation/soil quality/evaluation system/afforestation age/Nanhua Mountain分类
农业科技引用本文复制引用
马巧蓉,张育文,王继飞,杨君珑..宁夏南华山草地造林对土壤质量的影响[J].农业科学研究,2026,47(1):31-38,8.基金项目
宁夏南华山植物群落监测项目 （）
2023年中央财政林业草原生态保护恢复资金资助项目 （）
