| 耕作方式对稻田土壤有机碳组分含量及其分布的影响 |
| |
| 引用本文： | 徐尚起,崔思远,陈阜,肖小平,张海林.耕作方式对稻田土壤有机碳组分含量及其分布的影响[J].农业环境科学学报,2011,30(1). |
| |
| 作者姓名： | 徐尚起 崔思远 陈阜 肖小平 张海林 |
| |
| 作者单位： | 1. 中国农业大学农学与生物技术学院/农业部农作制度重点开放实验室,北京,100193
2. 湖南省土壤肥料研究所,长沙,410125 |
| |
| 基金项目： | 国家“十一五”支撑计划项目(2006BAD15B01); 公益性行业(农业)科研专项(200803028,200903003) |
| |
| 摘 要： | 为深入了解耕作方式对土壤碳组分含量的影响,以南方双季稻田为研究对象,研究了翻耕秸秆不还田(CT)、翻耕(CTS)、旋耕(RTS)和免耕(NTS)4种耕作处理对土壤轻组有机碳(LF-OC)、重组有机碳(HF-OC)、土壤轻组组分(LF)和重组组分(HF)的影响。结果表明,不同耕作方式下,土壤轻组中有机碳含量介于191.21～251.54gC·kg-1,fraction之间,轻组有机碳(LF-OC)含量介于3.01～9.27gC·kg-1之间,为土壤总有机碳(TOC)的11.84%～23.31%;耕作扰动导致土壤LF-OC的损失,而秸秆投入能够增加LF-OC;NTS处理利于表层土壤有机碳的积累,但不利于亚表层土壤有机碳的积累;RTS和CTS处理有利于有机碳增加,但LF-OC分解较快;CT处理则导致土壤有机碳的流失。LF-OC与TOC变化相似,呈显著正相关关系(R2=0.84),且LF-OC对耕作措施的响应比TOC更为剧烈,可以作为指示土壤有机碳库变化的灵敏指标。
|
| 关 键 词： | 耕作 有机碳 密度分组 双季稻田 |
Effect of Tillage on Content of Density Fractions of Paddy Soil Organic Carbon and Its Spatial Distribution |
| |
| XU Shang-qi,CUI Si-yuan,CHEN Fu,XIAO Xiao-ping,ZHANG Hai-lin.Effect of Tillage on Content of Density Fractions of Paddy Soil Organic Carbon and Its Spatial Distribution[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2011,30(1). |
| |
| Authors: | XU Shang-qi CUI Si-yuan CHEN Fu XIAO Xiao-ping ZHANG Hai-lin |
| |
| Institution: | XU Shang-qi1,CUI Si-yuan1,CHEN Fu1,XIAO Xiao-ping2,ZHANG Hai-lin1(1.College of Agronomy and Biotechnology,China Agricultural University,Key Laboratory of Farming System,Ministry of Agriculture of the People's Republic of China,Beijing 100193,China,2.Hunan Soil and Fertilizer Institute,Changsha 410125,China) |
| |
| Abstract: | The objective of this study was to understand effects of tillage on soil carbon and different fractions of it.Four tillage treatments were set up on the Double-Cropped rice field:conventional tillage without straw return(CT),conventional tillage(CTS),rotary tillage(RTS)and no-tillage(NTS).The heavy fraction of soil(HF),light fraction of soil(LF),high fraction organic carbon(HF-OC) and light fraction organic carbon(LF-OC) were measured,and the effect of tillage on different fractions of soil organic carbon w... |
| |
| Keywords: | tillage organic carbon soil density fractions Double-Rice cropping field |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《农业环境科学学报》浏览原始摘要信息 |
| 点击此处可从《农业环境科学学报》下载免费的PDF全文 |
|
