保护性耕作对农田土壤有机碳库的影响

被引:27
作者
张四海 [1 ]
曹志平 [1 ]
张国 [1 ]
胡婵娟 [2 ]
机构
[1] 中国农业大学资源与环境学院
[2] 中国科学院生态环境研究中心城市与区域生态国家重点实验室
关键词
保护性耕作; 碳输入; 碳分解; 碳固持;
D O I
10.16258/j.cnki.1674-5906.2012.02.015
中图分类号
S153.6 [土壤成分];
学科分类号
0903 ; 090301 ;
摘要
农田土壤有机碳库是陆地生态系统碳库的重要组成部分,对维持全球碳平衡具有重要意义。有机碳库的储量除了受气候和环境因素的影响外,还受农业耕作措施的影响。综述了保护性耕作对土壤有机碳库的影响,并从碳输入、碳分解和碳固持3个方面讨论了保护性耕作影响有机碳库的途径。大量实验结果表明,保护性耕作在表层土壤中能提高作物根系生物量1.0%142.9%;增加土壤微生物的生物量2.2%140%。免耕还显著降低土壤的呼吸强度,在0.9%72.6%之间,从而减少碳的损失。免耕还提高了土壤团聚体数量,从而有利于有机碳在土壤中的固持。今后的研究应该在如下几方面加强:(1)加强区域性对比研究;(2)加强长期定位研究;(3)加强对固碳机理的研究;(4)建立模型加强对多种因子综合效应的研究。
引用
收藏
页码:199 / 205
页数:7
相关论文
共 36 条
[1]   Implementation of chiselling and mouldboard ploughing in soil after 8 years of no-till management in SW, Spain: Effect on soil quality [J].
Melero, S. ;
Panettieri, M. ;
Madejon, E. ;
Gomez Macpherson, H. ;
Moreno, F. ;
Murillo, J. M. .
SOIL & TILLAGE RESEARCH, 2011, 112 (02) :107-113
[2]  
Soil properties and crop yields after 11 years of no tillage farming in wheat–maize cropping system in North China Plain.[J].Jin He;Hongwen Li;Rabi G. Rasaily;Qingjie Wang;Guohua Cai;Yanbo Su;Xiaodong Qiao;Lijin Liu.Soil & Tillage Research.2011, 1
[3]   Influence of mouldboard plough and rotary harrow tillage on microbial biomass and nutrient stocks in two long-term experiments on loess derived Luvisols [J].
Heinze, Stefanie ;
Rauber, Rolf ;
Joergensen, Rainer Georg .
APPLIED SOIL ECOLOGY, 2010, 46 (03) :405-412
[4]   No-till soil management increases microbial biomass and alters community profiles in soil aggregates [J].
Helgason, B. L. ;
Walley, F. L. ;
Germida, J. J. .
APPLIED SOIL ECOLOGY, 2010, 46 (03) :390-397
[5]   Effects of organic amendment and tillage on soil microorganisms and microfauna [J].
Treonis, Amy M. ;
Austin, Erin E. ;
Buyer, Jeffrey S. ;
Maul, Jude E. ;
Spicer, Lori ;
Zasada, Inga A. .
APPLIED SOIL ECOLOGY, 2010, 46 (01) :103-110
[6]   Soil microbial community response to controlled-release urea fertilizer under zero tillage and conventional tillage [J].
Lupwayi, Newton Z. ;
Grant, Cynthia A. ;
Soon, Yoong K. ;
Clayton, George W. ;
Bittman, Shabtai ;
Malhi, Sukhdev S. ;
Zebarth, Bernie J. .
APPLIED SOIL ECOLOGY, 2010, 45 (03) :254-261
[7]   Microbial biomass and activity at various soil depths in a Brazilian oxisol after two decades of no-tillage and conventional tillage [J].
Babujia, L. C. ;
Hungria, M. ;
Franchini, J. C. ;
Brookes, P. C. .
SOIL BIOLOGY & BIOCHEMISTRY, 2010, 42 (12) :2174-2181
[8]   Effects of mulching on soil physical properties and runoff under semi-arid conditions in southern Spain [J].
Jordan, Antonio ;
Zavala, Lorena M. ;
Gil, Juan .
CATENA, 2010, 81 (01) :77-85
[9]   Carbon contents and respiration rates of aggregate size fractions under no-till and conventional tillage [J].
Fernandez, Romina ;
Quiroga, Alberto ;
Zorati, Carlos ;
Noellemeyer, Elke .
SOIL & TILLAGE RESEARCH, 2010, 109 (02) :103-109
[10]   Tillage, residue burning and crop rotation alter soil fungal community and water-stable aggregation in arable fields [J].
Wang, Yin ;
Xu, Jie ;
Shen, Jianhua ;
Luo, Yongming ;
Scheu, Stefan ;
Ke, Xin .
SOIL & TILLAGE RESEARCH, 2010, 107 (02) :71-79