黄土高原丘陵沟壑区草地恢复对土壤碳氮库的影响

被引:11
作者
贺少轩 [1 ]
韩蕊莲 [2 ]
梁宗锁 [1 ,2 ]
机构
[1] 西北农林科技大学生命科学学院
[2] 中国科学院水土保持研究所
关键词
黄土高原; 草地恢复; 土壤碳氮;
D O I
暂无
中图分类号
S812.2 [草原土壤学];
学科分类号
0713 ;
摘要
对黄土高原丘陵沟壑区坡耕地及撂荒后5,13,24,32 a自然恢复草地的土壤有机碳(SOC)、无机碳(SIC)、全氮(TN)含量及储量(SOCs,SICs,TNs)进行了测定分析.结果显示,土壤有机碳含量随土壤垂直剖面降低.与坡耕地相比,0~5 cm SOC含量在草地恢复10 a后显著升高,而5~100 cm各土层的SOC含量在草地恢复的20 a后显著升高;0~100 cm各土层SIC含量在草地恢复5 a后即显著增加,且不同的恢复草地具有不同的SIC剖面分布类型.TN含量与SOC含量变化相似.但与坡耕地相比,早期的恢复(5,13 a)草地表层0~5 cm TN升高不明显,5~100 cm TN在草地恢复的5 a后显著升高.SOCs(0~100 cm)在恢复5 a的草地显著降低,恢复10 a后,显著升高;SICs(0~100 cm)和TNs(0~100 cm)在草地恢复5 a后即显著增加.此外,计算了土壤总碳储量(STCs),发现草地恢复过程中土壤碳库特征表现为越来越高的SOCs/STCs和越来越低的SICs/STCs.在草地恢复过程中,SOC和TN,STCs和TNs显著正相关(P<0.01).因此,草地恢复加强了土壤碳库的积累,包括土壤有机碳库和无机碳库,但是这两个碳库在总碳库的占比相反.多年生草种在土壤碳氮库积累中起重要作用.
引用
收藏
页码:1932 / 1940
页数:9
相关论文
共 27 条
[1]   湿润亚热带峰丛洼地岩溶土壤系统中碳分布及其转移 [J].
潘根兴 ;
孙玉华 ;
滕永忠 ;
陶于祥 ;
韩富顺 ;
曹建华 ;
何师意 .
应用生态学报, 2000, (01) :70-73
[2]   干旱地区土壤碳酸钙淀积过程模拟 [J].
段建南 ;
李保国 ;
石元春 ;
严泰来 ;
朱德海 .
土壤学报, 1999, (03) :318-326
[4]  
Natural vegetation restoration is more beneficial to soil surface organic and inorganic carbon sequestration than tree plantation on the Loess Plateau of China[J] . Zhao Jin,Yunshe Dong,Yunqiang Wang,Xiaorong Wei,Yafeng Wang,Buli Cui,Weijian Zhou.Science of the Total Environment . 2014
[5]  
The response of soil organic carbon and nitrogen 10<ce:hsp sp="0.25"/>years after returning cultivated alpine steppe to grassland by abandonment or reseeding[J] . Zhan-Huan Shang,Jing-Juan Cao,Rui-Ying Guo,Rui-Jun Long,Bo Deng.Catena . 2014
[6]   Total carbon and nitrogen in the soils of the world [J].
Batjes, N. H. .
EUROPEAN JOURNAL OF SOIL SCIENCE, 2014, 65 (01) :10-21
[7]  
Soil nitrogen distributions for different land uses and landscape positions in a small watershed on Loess Plateau, China[J] . Zhijing Xue,Man Cheng,Shaoshan An.Ecological Engineering . 2013
[8]  
Responses of plant–soil properties to increasing N deposition and implications for large-scale eco-restoration in the semiarid grassland of the northern Loess Plateau, China[J] . Xiangwei Han,Atsushi Tsunekawa,Mitsuru Tsubo,Hongbo Shao.Ecological Engineering . 2013
[9]  
Rhizosphere soil microbial properties on abandoned croplands in the Loess Plateau, China during vegetation succession[J] . Chao Zhang,Guobin Liu,Sha Xue,Changsheng Zhang.European Journal of Soil Biology . 2012
[10]   China [J].
不详 .
NUCLEAR PLANT JOURNAL, 2011, 29 (01) :8-8