南昌市安义县耕地破碎度与空间相关性研究
Study on the Fragmentation of Cultivated Land and Its Spatial Correlation in Anyi County, Nanchang City
摘要: 本文借鉴景观格局研究思路,构建耕地破碎度评价模型,通过2010年、2015年和2020年3期TM影像,对南昌市安义县的农田破碎化现状进行全面评估,为安义县农田管理政策的制定和完善提供依据,并为研究农田破碎化程度提供理论参考。本文结合使用熵值加权法和自然分级法的方式确定各项指标的权重,安义县七镇三乡耕地破碎度不断增加,2015~2020年耕地破碎速度增加幅度大于2005~2010年。经过计算,安义县耕地破碎度平均值为0.3816,在平均值以上的有五个乡镇,在平均值以下的有五个乡镇;研究区耕地破碎度相关性分析呈现负相关性,其中,H-H型零个,L-L型一个,L-H型三个,H-L型两个。
Abstract: In this paper, drawing on the idea of landscape pattern research, a cropland fragmentation evaluation model was constructed to comprehensively assess the current situation of cropland fragmentation in Anyi County, Nanchang City through 3 periods of TM images in 2010, 2015 and 2020, provide a basis for the formulation and improvement of farmland management policies in Anyi County, and provide a theoretical reference for studying the degree of cropland fragmentation. This paper uses a combination of entropy value weighting method and natural grading method to determine the weights of each index. The degree of farmland fragmentation in 7 towns and 3 townships in Anyi County has been increasing, and the increase in the rate of farmland fragmentation from 2015 to 2020 is greater than that from 2005 to 2010. After calculation, the average value of cultivated land fragmentation in Anyi County is 0.3816. There are 5 townships above the average value and 5 townships below the average value; the correlation analysis of cultivated land fragmentation in the study area showed a negative correlation, among which, there were 0 H-H type, 1 L-L type, 3 L-H type, 2 H-L type.
文章引用:熊莉, 袁睿佳. 南昌市安义县耕地破碎度与空间相关性研究[J]. 地理科学研究, 2023, 12(2): 252-261. https://doi.org/10.12677/GSER.2023.122023

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