黄土丘陵半干旱区人工柠条林土壤固碳特征及其影响因素

ISWC OpenIR > 水保所知识产出(1956---)

	黄土丘陵半干旱区人工柠条林土壤固碳特征及其影响因素
其他题名	Soil carbon sequestration characteristics of Caragana microphylla plantations
	崔静; 陈云明; 黄佳健; 王琼芳; 姚志杰; 张飞
	2012
发表期刊	中国生态农业学报
卷号	20 期号:09 页码:1197-1203
摘要	为了探讨黄土丘陵区不同生长年限的人工柠条林地土壤有机碳含量的变化特征及其影响因素,更好地阐明黄土丘陵区柠条林土壤的固碳机理,本文采用时空替代法,以撂荒2 a的坡耕地为对照,对黄土丘陵半干旱区不同林龄(10 a、17 a、26 a、34 a、40 a、50 a)人工柠条林地土壤有机碳(SOC)、全氮(STN)、全磷(STP)及柠条林的根系生物量和枯落物现存量进行了分析。结果表明:1)在0~60 cm的土层剖面上,0~20 cm土层SOC含量明显高于其他土层,并随土层深度的增加逐层递减,其中柠条林地0~20 cm土层SOC含量变化幅度为2.68~11.44 g·kg-1,而40~60 cm土层SOC含量仅在1.64~2.73 g·kg-1波动;与对照相比,随林龄增加柠条林地0~60 cm土层平均SOC含量先减小后增加最后趋于平稳:10 a和17 a柠条林SOC含量比对照显著降低了34.5%和26.9%,26 a柠条林的SOC含量显著升高,其值是对照的1.43倍,40 a和50 a柠条林SOC含量处于积累与消耗相对稳定的状态。2)对SOC含量与STN、STP含量及根系生物量和枯落物现存量进行...
其他摘要	Using spatio-temporal substitution method, this study analyzed soil organic carbon (SOC), soil total nitrogen (STN), soil total phosphor (STP), root biomass and litter biomass of Caragana microphylla plantations of different ages. Soil carbon content change characteristics under C. microphylla plantations and the influencing factors in the Loess Hilly Semiarid Region were discussed. It threw further light on soil carbon mechanisms under C. microphylla plantations. The results suggested that at 0~60 cm soil profile, SOC content steadily decreased with soil depth increasing. Also SOC content in the 0~20 cm soil layer was higher than that in the other soil layers. At 0~20 cm soil layer, SOC content was 2.68~11.44 g·kg1. At 40~60 cm soil depth, however, SOC content fluctuated only minimally and was 1.64~2.73 g·kg1. Compared with two-year abandoned sloping farmland (CK), variations in average SOC content under C. microphylla at 0~60 cm soil depth initially decreased and then increased before finally stabilizing with time. At C. microphylla ages 10 and 17, SOC content significantly decreased by 34.5% and 26.9%, respectively, compared with that in CK. At C. microphylla age 26, SOC content significantly increased, which was 1.43 times as that in CK. At C. microphylla ages 40 and 50, however, SOC content was in the state that accumulation and consumption of SOC was relatively stable. Correlation analysis showed that SOC was significantly correlated with STN, root biomass and litter biomass. However, there was no correlation between SOC and STP contents. The results indicated that soil carbon sequestration capacity increased by increasing soil total nitrogen content. Both the amounts of root biomass and litter biomass dictated soil carbon sequestration degree.
关键词	黄土丘陵区 Loess Hilly Region 柠条林地 Caragana Microphylla Plantations 土壤有机碳 Soil Organic Carbon 土壤全氮 Soil Total Nitrogen 土壤全磷 Soil Total 根系生物量枯落物现存量
语种	中文
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/5293
专题	水保所知识产出(1956---)
推荐引用方式 GB/T 7714	崔静,陈云明,黄佳健,等. 黄土丘陵半干旱区人工柠条林土壤固碳特征及其影响因素[J]. 中国生态农业学报,2012,20(09):1197-1203.
APA	崔静,陈云明,黄佳健,王琼芳,姚志杰,&张飞.(2012).黄土丘陵半干旱区人工柠条林土壤固碳特征及其影响因素.中国生态农业学报,20(09),1197-1203.
MLA	崔静,et al."黄土丘陵半干旱区人工柠条林土壤固碳特征及其影响因素".中国生态农业学报 20.09(2012):1197-1203.

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