不同退化程度草甸草原土壤理化性质与地上生物量的关系  

Relationships Between Different Degraded Meadow Steppe Soil Properties and Aboveground Biomasses

作　　者：杨晓刚[1] 乌仁其其格[1] 黄振艳[1] 李杰[1] 齐阿茹娜[1] 

机构地区：[1]呼伦贝尔学院生命科学与化学学院,内蒙古呼伦贝尔021008

出　　处：《现代农业科技》2013年第17期234-235,共2页Modern Agricultural Science and Technology

基　　金：呼伦贝尔学院青年项目资金(YJQN2C201223)

摘　　要：针对草原生态系统日益恶化的趋势,对呼伦贝尔不同退化程度草甸草原土壤的理化性质与地上生物量的关系进行了初步探讨。结果表明：土壤含水量、土壤磷、土壤速效氮、土壤有机质、地上生物量随着退化程度的增加显著下降,土壤钾、土壤容重（10～20cm）随着退化程度的增加而显著提高。土壤铵态氮和土壤容重（0～10cm）没有规律性变化,且土壤含水量、土壤容重、土壤有机物、铵态氮、速效氮、钾在不同退化程度之间都具有不同显著性差异。Based on the grassland ecosystem worsening trend, a preliminary discussion on relationships between biomasses and physicochemical properties of the Hulunbuir different degraded meadow steppe soil was done. The results showed that the soil water content,soil phosphorus,soil available nitrogen, soil organic matter, aboveground biomass increased with the degree of degradation decreased significantly,soil potassium in soil, soil bulk density（ 10-20 cm）improved with the increase of degradation. Soil ammonium nitrogen and soil bulk density （0-10 cm）did not have regular changes.At the same time,the soil water content,soil bulk density,soil organic matter,ammonium nitrogen,available nitrogen and potassium were different significantly among different degradation degrees.

关 键 词：草甸草原 土壤理化性质 退化指标 地上生物量 

分 类 号：S153[农业科学—土壤学]