ISWC OpenIR  > 水保所知识产出(1956---)
黄土丘陵区表层土壤有机碳沿降水梯度的分布
孙龙1,2; 张光辉1,3; 栾莉莉3; 李振炜4; 耿韧3
2016
Source Publication应用生态学报
Volume27Issue:2Pages:532-538
Abstract

沿368 ~ 591 mm 降水量梯度选取7 个调查地点、共63 个调查样点,在每个样点选择
恢复年限相近的林地、草地和农地,调查表层( 0 ~ 30 cm) 土壤有机碳的分布特征,分析气候、
土层深度和土地利用类型等因素对土壤有机碳分布的影响. 结果表明: 在黄土丘陵区368 ~
591 mm 的降水量范围内,表层土壤有机碳含量表现为草地( 8. 70 g·kg - 1 ) > 林地( 7. 88 g·
kg - 1 ) > 农地( 7. 73 g·kg - 1 ) ,土壤有机碳密度表现为草地( 20. 28 kg·m - 2 ) > 农地( 19. 34 kg
·m - 2 ) > 林地( 17. 14 kg·m - 2 ) . 林地、草地、农地的土壤有机碳含量无显著差异,综合3 种
土地利用类型的数据分析表明,不同降雨梯度下土壤有机碳含量差异显著( P < 0. 001) ,土壤
有机碳含量( r = 0. 838,P < 0. 001) 与年均降水量间存在显著线性正相关关系; 由北向南( 以最
北端鄂尔多斯为起点) ,土壤有机碳含量沿着368 ~ 591 mm 的年均降水量梯度的递增速率为
0. 04 g·kg - 1·mm - 1,土壤有机碳密度的递增速率为0. 08 kg·m - 2·mm - 1 . 年均降水量、土
壤黏粒含量、林下枯落物蓄积量和农作物根系密度可较好地模拟表层土壤有机碳分布.

Other Abstract

Along the 368 - 591 mm precipitation gradient,7 survey sites,i. e. a total 63 investigated
plots were selected. At each sites,woodland,grassland,and cropland with similar restoration
age were selected to investigate soil organic carbon distribution in surface soil ( 0 - 30 cm) ,and the
influence of factors,e. g. climate,soil depth,and land uses,on soil organic carbon distribution
were analyzed. The result showed that,along the precipitation gradient,the grassland ( 8. 70
g·kg - 1 ) > woodland ( 7. 88 g·kg - 1 ) > farmland ( 7. 73 g·kg - 1 ) in concentration and the
grassland ( 20. 28 kg·m - 2 ) > farmland ( 19. 34 kg·m - 2 ) > woodland ( 17. 14 kg·m - 2 ) in
density. The differences of soil organic carbon concentration of three land uses were not significant.
Further analysis of pooled data of three land uses showed that the surface soil organic carbon concentration
differed significantly at different precipitation levels ( P < 0. 001) . Significant positive relationship
was detected between mean annual precipitation and soil organic carbon concentration ( r
= 0. 838,P < 0. 001) in the of pooled data. From south to north ( start from northernmost Ordos) ,
i. e. along the 368 - 591 mm precipitation gradient,the soil organic carbon increased with annual
precipitation 0. 04 g·kg - 1·mm - 1,density 0. 08 kg·m - 2·mm - 1 . The soil organic carbon distribution
was predicted with mean annual precipitation,soil clay content,plant litter in woodland,
and root density in farmland.

Keyword黄土丘陵区 有机碳 降水梯度 表层土壤 土地利用
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8592
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国科学院大学
3.北京师范大学地理学与遥感科学学院
4.中国科学院亚热带农业生态研究所
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
孙龙,张光辉,栾莉莉,等. 黄土丘陵区表层土壤有机碳沿降水梯度的分布[J]. 应用生态学报,2016,27(2):532-538.
APA 孙龙,张光辉,栾莉莉,李振炜,&耿韧.(2016).黄土丘陵区表层土壤有机碳沿降水梯度的分布.应用生态学报,27(2),532-538.
MLA 孙龙,et al."黄土丘陵区表层土壤有机碳沿降水梯度的分布".应用生态学报 27.2(2016):532-538.
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