Effects of adjusting cropping systems on utilization efficiency of climatic resources in Northeast China under future climate scenarios

Publication date: Available online 5 August 2015 Source:Physics and Chemistry of the Earth, Parts A/B/C Author(s): Jianping Guo, Junfang Zhao, Yanhong Xu, Zheng Chu, Jia Mu, Qian Zhao Quantitatively evaluating the effects of adjusting cropping systems on the utilization efficiency of climatic resources under climate change is an important task for assessing food security in China. To understand these effects, we used daily climate variables obtained from the regional climate model RegCM3 from 1981 to 2100 under the A1B scenario and crop observations from 53 agro-meteorological experimental stations from 1981 to 2010 in Northeast China. Three one-grade zones of cropping systems were divided by heat, water, topography and crop-type, including the semi-arid areas of the northeast and northwest (III), the one crop area of warm-cool plants in semi-humid plain or hilly regions of the northeast (IV), and the two crop area in irrigated farmland in the Huanghuaihai Plain (VI). An agro-ecological zone model was used to calculate climatic potential productivities. The effects of adjusting cropping systems on climate resource utilization in Northeast China under the A1B scenario were assessed. The results indicated that from 1981 to 2100 in the III, IV and VI areas, the planting boundaries of different cropping systems in Northeast China obviously shifted toward the north and the east based on comprehensively considering the heat and precipitation resources. However, due ...

Source: Physics and Chemistry of the Earth, Parts ABC - August 7, 2015 Category: Science Source Type: research