摘要
为探讨围栏封育对科尔沁退化草甸草地土壤质量的影响,选择典型重度放牧场草地及其毗邻的围封7年的草地的土壤pH值、含盐量、养分、微生物生物量和酶活性进行了对比研究.结果表明:围栏封育有利于改善土壤的理化性质和生物活性,土壤含盐量、pH值显著下降,而土壤有机质、全氮、全磷、速效氮和速效磷等养分含量显著增加.微生物生物量C,N,P和土壤脲酶、磷酸单酯酶、脱氢酶、蛋白酶活性均大幅度提高,多酚氧化酶活性下降.围栏封育是科尔沁草甸草地改良的有效途径.
Fence enclosure is a simple and effective method for grassland restoration and is widely used for this purpose in the steppes of north China.Soil pH,nutrients,salt content,microbial biomass,and enzyme activity of soils in heavily degraded grassland in the Horqin area were compared with an adjacent plot enclosed for 7 years.Fence enclosure decreased soil pH and salt content and increased soil organic matter content,total N and P,and available N and P.Microbial biomass C,N,and P contents increased along with increases in urease,phosphomonoesterase,dehydrogenase,and protease activities,while polyphenol oxidase activity decreased.These results indicate that fence enclosure shows good prospects for grassland soil improvement in the Horqin area.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第3期427-430,451,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(40871247)
国家公益性行业科研专项经费项目(201004023)
中央高校基本科研业务费专项资金资助项目(N090405010)
关键词
围栏封育
退化草地
土壤养分
生物活性
土壤酶
微生物生物量
fence enclosure
degraded grassland
soil nutrient
biological activity
soil enzyme
microbial biomass
