CAJ | 학술논문

通过三峡库区8个植被类型370个样地的群落调查和土壤分析,研究了不同植被类型、土壤类型、海拔对表层土壤有机质及全氮、速效磷、速效钾含量的影响.结果表明:(1)三峡库区不同植被类型土壤有机质、全氮平均含量规律为阔叶林＞竹林＞针叶林＞灌丛＞草丛,森林土壤有机质及全氮平均含量丰富;速效磷平均含量表现为草丛＞落叶阔叶林＞灌丛＞暖性针叶林＞常绿落叶阔叶混交林＞温性针叶林＞竹林＞常绿阔叶林,草丛与其他植被类型差异显著;速效钾平均含量表现为常绿落叶阔叶混交林＞落叶阔叶林＞灌丛＞针叶林＞竹林＞草丛＞常绿阔叶林,竹林、草丛、常绿阔叶林与常绿落叶阔叶混交林、落叶阔叶林、灌丛、针叶林差异显著.(2)不同土壤类型养分含量差异显著,黄棕壤中有机质、全氮含量高,分别为6.83%、0.44%,紫色土中速效磷含量高,达到54.24mg/kg.(3)随海拔升高,有机质、全氮含量呈明显增加趋势,速效磷、速效钾含量变化趋势不明显.
통과삼협고구8개식피류형370개양지적군락조사화토양분석,연구료불동식피류형、토양류형、해발대표층토양유궤질급전담、속효린、속효갑함량적영향.결과표명:(1)삼협고구불동식피류형토양유궤질、전담평균함량규률위활협림＞죽림＞침협림＞관총＞초총,삼림토양유궤질급전담평균함량봉부;속효린평균함량표현위초총＞락협활협림＞관총＞난성침협림＞상록락협활협혼교림＞온성침협림＞죽림＞상록활협림,초총여기타식피류형차이현저;속효갑평균함량표현위상록락협활협혼교림＞락협활협림＞관총＞침협림＞죽림＞초총＞상록활협림,죽림、초총、상록활협림여상록락협활협혼교림、락협활협림、관총、침협림차이현저.(2)불동토양류형양분함량차이현저,황종양중유궤질、전담함량고,분별위6.83%、0.44%,자색토중속효린함량고,체도54.24mg/kg.(3)수해발승고,유궤질、전담함량정명현증가추세,속효린、속효갑함량변화추세불명현.
Through investigating and analyzing soil contents of 8 vegetation types and 370 experimental plots around the Three Gorges reservoir, we studied how different vegetation types, soil types, and altitudes affected the amounts of surface organic matter, total N, available P as well as available K. The results indicate: In general, average amounts of soil organic matter and total N are rich in forest around the Three Gorges reservoir area; specifically, the average amounts of the organic matter and total N vary in different vegetation types in the following order: broad-leaved forest＞bamboo forest＞coniferous forest＞shrub＞grass. The average amounts of available P in the vegetation decrease gradually in the order of:grass＞deciduous broad-leaved forest＞shrub＞warm coniferous forest＞deciduous broad-leaved evergreen forest＞temperate coniferous forest＞bamboo forest＞evergreen broad-leaved forest,as the grass differentiates from other types of vegetation dramatically. The average amounts of available K vary in the order of deciduous broad-leaved evergreen forest＞deciduous broad-leaved forest＞shrub＞coniferous forest＞bamboo forest＞grass＞evergreen broad-leaved forest. The amounts of nutrients in different types of soil vary remarkably, as the yellow-brown soil is rich in organic matter and total N, while the purple soil is rich in available P. With increases in altitude, organic and total N increase dramatically; no obvious trend is found as the amount of available P and available K change. The correlation analysis indicates that the content of soil organic matter, total N are significantly positively correlative.