Short-Term Impacts of No Tillage on Aggregate-Associated C in Black Soil of Northeast China |
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| Authors: | LIANG Ai-zhen YANG Xue-ming ZHANG Xiao-ping SHEN Yan SHI Xiu-huan FAN Ru-qin FANG Hua-jun |
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| Institution: | 1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, P.R. China;2. Greenhouse & Processing Crops Research Centre, Agriculture & Agri-Food Canada, Ontario N0R 1G0, Canada;3. Institute of Geographic Sciences and Natural Resources Research Centre, Chinese Academy of Sciences, Beijing 100101, P.R. China;1. Key Laboratory of Soil Resource Sustainable Utilization for Commodity Grain Bases of Jilin Province, College of Resource and Environmental Science, Jilin Agricultural University, Changchun 130118, P.R.China;2. Jilin Academy of Agricultural Sciences, Changchun 130033, P.R.China;1. College of Agronomy and Biotechnology, China Agricultural University; Key Laboratory of Farming System, Ministry of Agriculture of China, Beijing 100193, China;2. College of Agriculture, Shanxi Agricultural University, Taiyuan, Shanxi 030801, China;3. Carbon Management and Sequestration Center, School of Environment and Natural Resources, The Ohio State University, Columbus, OH 43210, USA;1. Key Laboratory of Optimized Design for Modern Agricultural Equipment, Department of Agricultural Engineering, College of Engineering, China Agricultural University, P.O. Box 46, Beijing 100083, China;2. Bangladesh Agricultural Research Institute, Gazipur 1701, Bangladesh;3. Agricultural Mechanisation Bureau of Fuxin Mongolian Autonomous County, Liaoning Province, Fuxin 123129, China;4. International Maize and Wheat Improvement Center (CIMMYT), Ningxia Province 750002, China;1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China;2. Soil Nutrients Recycling Group, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China;1. College of Agronomy and Biotechnology, China Agricultural University, Key Laboratory of Farming System, Ministry of Agriculture of China, Beijing 100193, China;2. Limpopo Department of Agriculture, Research Services (Cropping Systems Division), Polokwane 0699, South Africa;3. Carbon Management and Sequestration Center, School of Environment and Natural Resources, The Ohio State University, Columbus, Ohio 43210, USA |
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| Abstract: | In order to get a good indicator to evaluate the impacts of no tillage (NT) on soil structure and soil quality, we studied the dynamics of total soil organic carbon (SOC) and aggregate-associated SOC, and their relationships in the plow layer (30 cm) in black soil of Northeast China under NT practice. The tillage experiment was established in Dehui County, Jilin Province, China, in 2001. The total SOC and aggregate-associated SOC under 5-yr tillage treatments were measured. NT practices did not lead to the increase of average SOC content at 0-30 cm depth, but it did significantly increase SOC at the top soil (0-5 cm). In NT plots, the change of SOC in > 1000 μm aggregate was the same with that of total SOC, but the effect of NT on SOC in > 1000 μm aggregate was greater than the effect on total SOC, suggesting that > 1000 μm aggregate had more sensitive response to the impact of tillage practices. Also, significant positive correlation occurred between total SOC and SOC in > 1000 μm aggregate in black soil. Consequently, in the short term soil macroaggregate > 1000 μm could be used as an indicator to evaluate the impacts of tillage practices on soil structure in black soil of Northeast China. |
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| Keywords: | no tillage soil organic carbon water-stable aggregate black soil |
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