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- W2380292989 abstract "Choosing Lancang County as the research area,this paper studied the available content and the distribution regularity of the Microelements B,Cu,Zn,Fe and Mn in the forest of perennial evergreen broad-leaved forest,forest of pinus kesiya var.langbianensis and the man-made 3 a eucalyptus forest in the subtropical mountainous zone of southwest Yunnan.This paper also made research on the volume of the trace elements in the soil consumed by the three vegetation types in similar habitat condition and the vertical distribution regularity in the soil profile.The main conclusions are as follows:(1) In the soil of different vegetation types,the available content of Fe is above the critical level,but the available content of Zn,Mn and B is under the line.This area is lack of the elements of Zn,Mn and B.The available content of Cu in the soil of evergreen broad-leaved forest and forest of pinus kesiya var.langbianensis is below the critical level.However the soil in the eucalyptus forest is not lack of Cu.(2) There is a big difference in the available content of the microelements according to the soil of different vegetation types.The available content of Fe and Zn rank the first,and the available content of Mn is the lowest in the evergreen broad-leaved forest.The available content of Cu and Mn rank the first,and the available content of Zn is the lowest in the eucalyptus forest.All the microelements are more or less the same in the soil of pine forest with the lowest content of Fe.The available content of B is deficient in each vegetation type.(3) Comparatively the consumption of the available content of Fe in the eucalyptus forest is higher than the other two vegetations in the similar habitat condition,but available content of Fe is not deficient in each vegetation type.The consumption of Zn and Cu in the evergreen broad-leaved forest and forest of pinus kesiya var.langbianensis is higher than that in the eucalyptus forest.The consumption of Mn in the evergreen broad-leaved forest is higher than that in eucalyptus forest,and the consumption of Mn in the eucalyptus forest is higher than that in the forest of pinus kesiya var.langbianensis.The soil of all the three vegetations is lack of the microelements of Zn,Mn,B and Cu.(4) The distribution regularity of each microelement in the soil profile of the study area varies according to each element.The regularity of a few elements is related to the vegetation type.The available content of Fe and Mn is increasing with the depth of the soil in the evergreen broad-leaved forest,but the available content of Zn is decreasing.In the similar habitat condition of eucalyptus forest,the available content of Fe and Mn is decreasing with the depth of the soil.There is no evident regularity of other elements.The available content of Fe and Mn is decreasing with the depth of the soil of the forest of pinus kesiya var.langbianensis.The available content of Fe and Mn is increasing with the depth of the soil in the eucalyptus forest,and there is also no evident regularity of other elements." @default.
- W2380292989 created "2016-06-24" @default.
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- W2380292989 date "2008-01-01" @default.
- W2380292989 modified "2023-09-23" @default.
- W2380292989 title "Research on the Microelements in the Soil of the Main Vegetation Types in the Subtropical Mountainous Zone of Southwest Yunnan" @default.
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