摘要
研究了青海省祁连县黑河上游冰沟流域3种林地的土壤有机碳分布特征与土壤特性的关系,以期为黑河上游冰沟流域水源涵养研究提供科学依据。结果表明,3种林地0-60mm土层有机碳密度表现为针叶林>森林灌丛>阔叶林,针叶林有机碳密度为7.18kg·m-2,是森林灌丛、阔叶林的1.24和1.58倍,针叶林、森林灌丛、阔叶林0-10mm土层有机碳密度分别为13.22、9.49和8.62kg·m-2,是剖面有机碳密度均值的1.84、1.63和1.89倍。3种林地0-60mm土层自然含水量、团聚体、全氮均值表现为针叶林>森林灌丛>阔叶林,而容重、物理性沙粒、pH均值表现为针叶林<森林灌丛<阔叶林。3种林地土壤有机碳含量与自然含水量、团聚体、全氮之间呈显著的正相关关系(P<0.05),与容重、物理性沙粒、pH之间呈显著的负相关关系。
The experiment was conducted to determine the relationship between soil organic carbon distribution and soil properties among three woodlands at Ice Valley in the upper reaches of Heihe basin,Qilian County of Qinghai Province.This study showed that the average organic carbon density at 0-60mm layer was sorted as coniferous forest>forest thicket>broad-leaved forest.The organic carbon density was 7.18kg·m-2in coniferous forest,and was 1.24 times of shrubbery and 1.58 times of broad-leaved forest.The soil organic carbon density at 0-10mm layer was 13.22,9.49 and 8.62kg·m-2in coniferous forest,forest thicket and broad-leaved forest,respectively,and was 1.84,1.63,and 1.89 times of organic carbon density of total soil profile,respectively.The moisture content,aggregate and total nitrogen at 0-60mm layer was sorted as following order,coniferous forest>forest thicket>broad-leaved forest,while bulk density,physical grains of sand and pH value was coniferous forest<forest thicket<broad-leaved forest.The correlation analysis showed that the soil organic carbon content was positively related to natural moisture content,aggregate,and total nitrogen(P<0.05),however,it was negatively related to bulk density,physical grains of sand and pH in three woodlands(P<0.05).
出处
《草业科学》
CAS
CSCD
北大核心
2015年第4期640-646,共7页
Pratacultural Science
基金
国家自然科学基金重点支持项目"黑河流域生态水分样带调查"(91025002/D010106)
关键词
黑河上游
林地
有机碳
土壤特性
the upper reaches of Heihe River
woodland
organic carbon
soil properties
