武功山草甸土壤微量元素分布及对人为干扰的响应  

Microelement distributions and responses to human disturbance in meadow soil of Wugong Mountain

作　　者：邓邦良 袁知洋[1] 郭晓敏[1] 

机构地区：[1]江西农业大学园林与艺术学院,江西南昌330045

出　　处：《草业科学》2015年第10期1555-1560,共6页Pratacultural Science

基　　金：国家科技支撑计划项目(2012BAC11B06);国家自然科学基金项目(31360177)

摘　　要：土壤中有效态微量元素的供给水平会影响植物的正常生长和发育。通过研究武功山山地草甸土壤有效态微量元素Fe、Cu、Mn、Zn、B的分布特征以及对人为干扰的响应,发现有效态Fe、Cu、Mn、Zn、B的平均含量分别为169.15、0.94、3.73、1.60、0.28 mg·kg-1,有效态Fe、Cu、Zn、B随海拔增加并未有显著增加或减少的规律,0-20cm土层的有效态Mn随海拔增加有显著(P<0.05)减少趋势。有效态Fe、Mn、Zn具有空间异质性。0-20和20-40 cm土层,有效态Cu都对人为干扰响应敏感(P<0.05),且随着人为干扰程度的增加,有效态Cu含量呈现富集现象,最大富集率分别为139.5%和181.8%。The supply of available soil microelement will affect the normal growth and development of plant. The present study was conducted to analyze the distribution characteristics of available soil microelement Fe,Cu,Mn,Zn,and B and its response to disturbance in the meadow soil of Wugong Mountain. The results showed that the average contents of available Fe,Cu,Mn,Zn,and B were 169. 15,0. 94,3. 73,1. 60,and 0. 28 mg·kg^- 1,respectively,and available Fe,Cu,Zn,and B did not significantly change with the increase of altitude,and available Mn at 0 ― 20 cm soil layer had a significant（ P〈 0. 05） decreasing trend with the increase of altitude. Available Fe,Mn,Zn had spatial heterogeneity. Available Cu was sensitive response to human disturbance at both 0- 20 cm and 20- 40 cm soil layer,and the enrichment of available Cu was positively associated with the increase of the degree of human disturbance with the biggest enrichment 139. 5% and 181. 8%,respectively.

关 键 词：武功山 草甸 微量元素 海拔 人为干扰 

分 类 号：S812.2[农业科学—草业科学]