The Influences of Topographic Factors on Soil Organic Carbon Storagein Cool Conifer Forest in the North of Great Xing'an Mountain
In order to study the influences of topographic factors on soil organic carbon storage in cool conifer forest,soil samples were symmetrically collected from 20 plots in the north of Great Xing'an Mountain in Heilongjiang Province(122°40′52″～126° 20′03″E,51°40′46″～53°20′15″N).The content of organic carbon of different soil layers were measured on the basis of the difference of aspects and positions of the slope.The result showed that the organic carbon density within one-meter soil profile ranged from 8.14 to 23.39 kg·m-2 and the organic carbon content and density belong to medium mutation except for O layer.Most of the soil organic carbon concentrated obviously in the O layer and A layer.Besides,the storage and density of soil organic carbon were affected significantly by the terrain factors(the positions,aspects and gradients of the slope).Both of them at downhill were significantly higher than those at uphill,meanwhile ones at the shady slopes were higher than those at the sunny slopes(except for AB layer or B layer).At the same time,the profile of soil organic carbon density in A layer and 1 m profile decreased with increasing slope gradient.It is better to take good advantage of the terrain and make plants flourish to let them grow ecologically since the shady slopes and downhill are the most favorable to the accumulation of organic carbon.In addition,this study also provides scientific basis for accurately assessing the storage and distribution of soil organic carbon in boreal forest.
north of Great Xing'an Mountainsboreal foresttopographic factorsoil organic carbon contentsoil organic carbon density
国家科技期刊平台
NSTL
万方数据
维普
