2010•Shuitu baochi yanjiuRequires access
Soil Organic Carbon Storage under Different Land Use Types at Mountain Forest-Drought Valley Ecotone in the Upper Reaches of Minjiang River
Yongjun Wang
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Abstract
Ecotone is a sensitive region for global climate change,and study on soil organic carbon under different land use types at ecotone could provide basic data for land management.Soil organic carbon content and storage were decreased with the soil depth increment under 6land use types at mountain forest-drought valley ecotone in the upper reaches of Minjiang River.Soil organic storage followed the order of Quercus semicarpifoliasecondary forest(104.15±4.84t/hm2)shrubbery(100.84±2.43t/hm2)shrub(97.35±15.21t/hm2)economic forest(85.16±10.58t/hm2)Robinia pseudoacacia plantation(70.78±12.43t/hm2)farmland(56.56±7.21t/hm2).Soil organic carbon storage increased by 25.13%and 50.56%,respectively after farmland was converted into Robinia pseudoacacia plantation and economic forest.Jamming and frangibility of ecotone were the main reason for lower soil organic carbon storage under different land use types at mountain forest-drought valley ecotone in the upper reaches of Minjiang River.