中国东北松嫩平原1990–2015年的农田环境变化特征分析（英文）

作     者：张远 臧淑英 孙丽 阎炳和 杨天鹏 闫文佳 MEADOWS E Michael WANG Cuizhen QI Jiaguo 

作者机构：Key Laboratory of Geographic Information Science(Ministry of Education)School of Geographic SciencesEast China Normal University Institute of Eco-ChongmingEast China Normal University Key Laboratory of Remote Sensing Monitoring of Geographic EnvironmentCollege of Heilongjiang ProvinceHarbin Normal University Department of Environmental&Geographical ScienceUniversity of Cape Town Department of GeographyUniversity of South Carolina Center for Global Change and Earth Observations and Department of GeographyMichigan State University 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2019年第29卷第5期

页      面：658-674页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0704[理学-天文学] 0713[理学-生态学] 

基　　金：National Natural Science Foundation of China No.41571410 No.41571199 No.41401589 

主　　题：Songnen Plain environmental characteristics of cropland climate change soil properties grain yield 

摘      要：Quantitative characterization of environmental characteristics of cropland(ECC)plays an important role in maintaining sustainable development of agricultural systems and ensuring regional food security. In this study, the changes in ECC over the Songnen Plain, a major grain crops production region in Northeast China, were investigated for the period 1990–2015. The results revealed significant changes in climate conditions, soil physical properties and cropland use patterns with socioeconomic activities. Trends in climate parameters showed increasing temperature(+0.49°C/decade, p 0.05) and decreasing wind speed(–0.3 m/s/decade, p 0.01) for the growing season, while sunshine hours and precipitation exhibited non-significant trends. Four topsoil parameters including soil organic carbon(SOC), clay, bulk density and pH, indicated deteriorating soil conditions across most of the croplands, although some do exhibited slight improvement. The changing amplitude for each of the four above parameters ranged within –0.052 to 0.029 kg C/kg, –0.38 to 0.30,–0.60 to 0.39 g/cm^3, –3.29 to 2.34, respectively. Crop production significantly increased(44.0 million tons) with increasing sown area of croplands(～2.5 million ha) and fertilizer application(～2.5 million tons). The study reveals the dynamics of ECC in the Songnen Plain with intensive cultivation from 1990 to 2015. Population growth, economic development, and policy reform are shown to strongly influence the spatiotemporal changes in cropland characteristics.The study potentially provides valuable scientific information to support sustainable agroecosystem management in the context of global climate change and national socioeconomic development.