1.College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
2.College of Engineering, China Agricultural University, Beijing 100083, China
3.Research Institute of Soil, Fertilizer and Agricultural Water Conversation, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Agro-Environment in Northwest Oasis, Ministry of Agriculture and Rural Affairs, Urumqi 830091, China
4.Heilongjiang Academy of Agricultural Reclamation, Harbin 150038, China
5.College of Economics and Management, China Agricultural University, Beijing 100083, China
To develop the estimation method of the bearing capacity of animal manure based on soil carbon sequestration, The agriculture and animal husbandry production system in Beidahuang Group (BG) and Xinjiang Production and Construction Corps (XPCC) were selected as the research objects. According to the current situation of the agriculture and animal husbandry industry and farmland soil carbon sequestration mechanism, the farmland bearing capacity model of animal manure based on soil organic carbon density change rate was constructed. This model was based on the steady-state method from IPCC technical guidelines. The target value of soil organic carbon density change rate was set, and manure application amount and carrying capacity could be calculated through this model. The results showed that: 1) When the farmland soil organic carbon density remained at the current level, the bearing capacity of animal manure for BG and XPCC ranged from 180.5 to 832.1 and 14.7 to 327.6 pig equivalent per hectare, respectively. 2) Considering the demand for soil carbon sequestration, the amount of animal breeding would be increased in the future. This study provided reference materials for coupling crop and livestock production, green and low-carbon development.
人类活动直接或间接造成的温室气体排放是全球变暖的主要原因之一。政府间气候变化专门委员会(Intergovernmental Panel on Climate Change,IPCC)发布报告指出,2007—2016年,农业生产温室气体排放量占人为温室气体排放总量的23%,而农田土壤固碳量约占陆地生态系统总固碳量的21%[1]。因此,促进农田土壤固碳,已成为当前农业领域的重要研究课题。
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