Tillage effect on organic carbon in a purple paddy soil

被引：21
作者：
Huang Xue-Xia [1 ]
Gao Ming
Wei Chao-Fu
Xie De-Ti
Pan Gen-Xing
机构：
[1] SW Agr Univ, Coll Resources & Environm, Chongqing 400716, Peoples R China
[2] Guangzhou Univ, Coll Environm Sci & Technol, Guangzhou 510006, Peoples R China
[3] Nanjing Agr Univ, Coll Reources & Environm, Nanjing 210095, Peoples R China
来源：
PEDOSPHERE | 2006年 / 16卷 / 05期
关键词：
carbon sequestration; organic carbon storage; purple paddy soil; tillage system;
D O I：
10.1016/S1002-0160(06)60100-8
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
The distribution and storage of soil organic carbon (SOC) based on a long-term experiment with various tillage systems were studied in a paddy soil derived from purple soil in Chongqing, China. Organic carbon storage in the 0-20 and 0-40 cm soil layers under different tillage systems were in an order: ridge tillage with rice-rape rotation (RT-rr) > conventional tillage with rice only (CT-r) > ridge tillage with rice only (RT-r) > conventional tillage with rice-rape rotation (CT-rr). The RT-rr system had significantly higher levels of soil organic carbon in the 0-40 cm topsoil, while the proportion of the total remaining organic carbon in the total soil organic carbon in the 0-10 cm layer was greatest in the RT-rr system. This was the reason why the RT-rr system enhanced soil organic carbon storage. These showed that tillage system type was crucial for carbon storage. Carbon levels in soil humus and crop-yield results showed that the RT-rr system enhanced soil fertility and crop productivity. Adoption of this tillage system would be beneficial both for environmental protection and economic development.
引用
收藏
页码：660 / 667
页数：8
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