祁连山青海云杉林土壤有效微量元素含量特征  

Characteristics of Soil Available Microelements Content of Picea crassifolia Forest in the Qilian Mountains

作　　者：赵维俊[1,2,3] 刘贤德[1,2,3] 金铭 张学龙 敬文茂 王顺利 马剑 

机构地区：[1]甘肃省祁连山水源涵养林研究院,甘肃张掖734000 [2]甘肃农业大学林学院,甘肃兰州730070 [3]甘肃省森林生态与冻土水文水资源重点实验室,甘肃张掖734000

出　　处：《土壤通报》2015年第2期386-391,共6页Chinese Journal of Soil Science

基　　金：林业公益性行业科研专项"西北高寒山地针叶林碳氮水耦合观测;模拟与应用技术(201104009-08)";国家自然科学基金项目"祁连山土壤氮矿化特征及分异规律研究(31260141)"共同资助

摘　　要：以建立在祁连山西水林区大野口流域的1 hm2青海云杉林样地为研究对象,采用剖面取样与室内分析相结合的方法,分析了土壤锌、锰、铜、铁、硼等有效微量元素的含量、密度大小和有效性指数、与有机质和p H值及速效磷之间的相关性。结果表明:(1)不同土层有效微量元素锌、锰、铜、铁、硼的平均含量大小顺序均为:铁】锰】铜】硼】锌,有效微量元素均具有明显的'表聚效应'。0~60 cm土层有效锌、锰、铜、铁、硼均值大小分别为:(0.52±0.27)mg kg-1、(6.26±1.76)mg kg-1、(2.44±0.98)mg kg-1、(94.69±25.48)mg kg-1、(2.19±0.70)mg kg-1。(2)0~60 cm土层中,锌、锰、铜、铁、硼密度大小分别为:(2.21±1.27)mg m-2、(26.24±7.64)mg m-2、(11.50±6.41)mg m-2、(447.78±178.04)mg m-2、(9.76±3.32)mg m-2,有效性指数大小为:铁】硼】铜】锰】锌,其中:铁、硼、铜有效性指数大于1,而锌、锰有效性指数小于1。(3)不同土层有机质与锌、锰、铜、铁、硼等均呈显著或极显著正相关,p H值与锌、锰、铜、铁、硼等均呈显著或极显著负相关,速效磷仅与硼呈极显著正相关,有机质和p H值均对有效微量元素含量具有重要影响。This study took a 1 ha Picea crassifolia forest plot of Dayekou basin in Qilian Mountains as the research object. Using the profile sampling and laboratory analysis methods, we analyzed the contents, density sizes, availability indexes and the correlations of microelements such as Zn, Mn, Cu, Fe, B along the soil profile, as well as the soil organic matter, p H and rapid available phosphorus. The results were as follows.(1) The order of the average content of soil available microelements in different soil profile was Fe > Mn > Cu > B > Zn. Soil available microelements obviously gathered in the soil surface. The contents of Zn, Mn, Cu, Fe, B in 0 ~ 60 cm soil profile were respectively(0.52 ± 0.27) mg kg-1,(6.26 ± 1.76) mg kg-1,(2.44 ± 0.98) mg kg-1,(94.69 ± 25.48) mg kg-1,(2.19 ± 0.70)mg kg-1.(2) The density of Zn, Mn, Cu, Fe and B in 0 ~ 60 cm soil profile was(2.21 ± 1.27) mg m-2,(26.24 ± 7.64)mg m-2,(11.50 ± 6.41) mg m-2,(447.78 ± 178.04) mg m-2and(9.76 ± 3.32) mg m-2, respectively. The order of effective index ranked as Fe > B > Cu > Mn > Zn. And effective indexes of Fe, B and Cu were greater than 1, and those of Zn and Mn were less than 1.(3) The contents of soil organic matter had a highly significant and significantly positive correlation with Zn, Mn, Cu, Fe, B and other available microelements. The p H value of soil had a highly significant and significantly negative correlation with Zn, Mn, Cu, Fe, B and other available microelements, rapid available phosphorus only were very significantly positive correlation with B. Soil organic matter and p H had an important influence on soil available microelements contents.

关 键 词：青海云杉林 土壤剖面 有效微量元素 祁连山 

分 类 号：S714.2[农业科学—林学]