摘要
为提高土地集约利用和增加新增耕地、保护耕地资源、确保国家粮食安全,上海市进行了多个市级土地整治项目。耕地景观格局是耕地农业生态系统的直观体现。本研究以上海市某市级土地整治项目为基础,选取项目范围内三个典型代表性的行政村,以C村、L村和N村为例,运用空间自相关分析和地理加权回归模型从村庄尺度对耕地质量与耕地景观格局两者的联系进行耦合分析,以期为后期土地整治项目耕地规划提供理论参考依据。结果表明,三个村庄的耕地质量受斑块密度(PD)、面加权平均形状因子(AWMSI)、最大斑块面积(LPI)和香农多样性(SHDI)四个景观格局指数影响强烈。其中,C村的耕地质量最优,虽然其耕地破碎化程度高于L村和N村,但景观生态丰富具有优势,连通度极高。C村耕地的破碎化程度主要受沟渠、道路等农业基础设施切割作用影响,该地区现代化农业发达,合理规划道路、沟渠等农田景观要素,从优化景观格局角度提高耕地质量,能够有效促进耕地生产和生态功能协调发展。
Shanghai has been carrying out many municipal land consolidation projects to improve the intensive use of land,increase newly cultivated land,protect cultivated land,and ensure national food security.The landscape pattern of cultivated land is a direct reflection of cultivated land agroecosystems.Based on a municipal land consolidation project in Shanghai,this study selected three typical administrative villages(Village C,L,and N)to analyze the relationship between cultivated land quality and cultivated land landscape patterns at the village scale,using spatial autocorrelation analysis and a geographically weighted regression model.This study provides a theoretical reference for farmland planning for land consolidation projects.The results showed that the cultivated land quality of the three villages was strongly affected by patch density(PD),area-weighted average shape factor(AWMSI),maximum patch area(LPI),and Shannon diversity(SHDI).Village A had the best–cultivated land quality.Although the degree of cultivated land fragmentation was higher than that of Villages L and N,Village C had the advantage of rich landscape ecology and high connectivity.The degree of fragmentation of cultivated land in Village C was mainly affected by the cutting effect of agricultural infrastructure,such as ditches and roads.Modern agriculture was developed in Village C.Reasonable planning of farmland landscape elements such as roads and ditches and improvement of cultivated land quality from the perspective of optimizing landscape patterns can effectively promote the coordinated development of cultivated land production and ecological function.
作者
陈敏
顾文怡
仪小梅
CHEN Min;GU Wenyi;YI Xiaomei(Shanghai Geotechnical Engineering Detecting Centre Co.,Ltd,Shanghai 200436,China;Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area,Ministry of Natural Resources of China,Shanghai 200003,China;School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《上海国土资源》
2021年第4期28-32,38,共6页
Shanghai Land & Resources
基金
自然资源部大都市区国土空间生态修复工程技术创新中心开放课题(CXZX202005)。
关键词
土地整治
耕地质量
耕地景观格局
地理加权回归模型
land consolidation
quality of cultivated land
landscape pattern of cultivated land
geographically weighted regression model
