摘要
研究旨在对2001—2021年呼伦贝尔农垦集团各农牧场的生态净初级生产力(Net ecosystem productivity,NEP)进行评估,为开展农田生态系统的碳源/汇分析提供技术参考。研究基于遥感、气象等数据计算呼伦贝尔农垦集团各农牧场的NEP,并结合Sen趋势线分析法、Hurst指数、变异系数法、偏相关分析法对NEP的变化趋势和气候响应情况进行分析。研究表明:呼伦贝尔农垦集团的年平均NEP为221.1 g C/(m·a),从大兴安岭向两麓递减分布;研究期内NEP主要呈现显著或极显著的增加趋势,但Hurst指数分析表明,大部分农牧场未来NEP的变化与之前呈负相关,即减少趋势;呼伦贝尔农垦集团的NEP与降水呈极显著正相关,而与气温的相关程度不大。建议呼伦贝尔农垦集团加强固碳能力高的耕作方式的推广力度,防止农田生态系统的固碳能力下降,同时加强农业灌溉及人工影响天气能力建设,降低农田干旱灾害的发生风险及影响。
To provide technical reference for the carbon source/sink analysis of farmland ecosystem,the ecological net primary productivity(Net ecosystem productivity,NEP)of Farm of Agricultural Reclamation Group in Hulun Buir was evaluated from 2001 to 2021.The NEP of various farms was studied based on remote sensing and meteorological data.The change trend and the response to climate of NEP were analyzed by using Sen trend line analysis method,Hurst index,coefficient of variation method and partial correlation analysis method.The results showed that the annual average NEP of Hulun Buir was 221.1 g C/(m·a),decreasing to the both sides of the Daxing'an Mountains.There was extremely significant increase of NEP during the study period.However,the results of Hurst index analysis showed that NEP changes of most farms of Hulun Buir Agricultural Reclamation Group were negatively associated with previous,namely decreasing trend in the future.The correlation between the NEP of Hulun Buir Agricultural Reclamation Group and precipitation was significant positive,but insignificant with temperature.It is suggested that Hulun Buir Agricultural Reclamation Group should strengthen the promotion of farming methods with high carbon fixation capacity to prevent the decline of carbon fixation capacity of farmland ecosystem,and strengthen the construction of agricultural irrigation and weather modification capacity to reduce the risk and impact of farmland drought disasters.
作者
曲学斌
姜凤友
高绍鑫
辛孝飞
QU Xuebin;JIANG Fengyou;GAO Shaoxin;XIN Xiaofei(Hulun Buir Meteorological Bureau,Hulun Buir,Inner Mongolia 021008;2Hulun Buir Agriculture and Animal Husbandry Bureau,Hulun Buir,Inner Mongolia 021008)
出处
《中国农学通报》
2023年第32期109-114,共6页
Chinese Agricultural Science Bulletin
基金
内蒙古自治区气象局引导性创新基金项目“呼伦贝尔农业气象指标整合及平台模块化研发”(nmqxydcx202205)
呼伦贝尔市科技计划项目“强降雨诱发中小河流洪水、山洪地质灾害监测预警技术研究与应用”(SF2022014)。
关键词
呼伦贝尔农垦集团
生态净初级生产力
变化趋势
气候响应
Hulun Buir Agricultural Reclamation Group
ecological net primary productivity
change trend
climate response
