ZANG Liang,LIANG Hongying,LIANG Wentao,et al.Cultivated Land Fragmentation and Affecting Factors of Lulong County Based on Landscape Pattern[J].Research of Soil and Water Conservation,2018,25(06):265-269,276.
基于景观格局的卢龙县耕地细碎化评价及影响因素研究
- Title:
- Cultivated Land Fragmentation and Affecting Factors of Lulong County Based on Landscape Pattern
- 分类号:
- F323.211
- 摘要:
- 以卢龙县为研究区，基于景观生态学原理选取平均地块面积指数（MPS）、斑块数量破碎化指数（FN）、平均最临近距离（MNN）、边界密度指数（ED）、面积加权形状指数（AWMSI）5个景观指数构建指标体系，对卢龙县耕地细碎化程度进行了评价，然后通过地理加权回归模型对耕地细碎化的影响因素进行了分析。结果表明：卢龙县耕地细碎化整体上处于较低的水平。其中重度细碎化村庄61个，主要分布在卢龙县西南、东南和县域北部；中度细碎化村庄232个，主要分布在县域东南、西南和中北部；轻度细碎化村庄289个，主要分布在县域中部和南部。卢龙县耕地细碎具有空间正相关性，呈现出明显空间聚类特征。坡度、居民点、河流、交通等因素对耕地细碎化的影响程度具有空间非平稳性。其中坡度影响程度以正影响为主，只有少量地区呈现负影响；居民点对耕地细碎化的正负影响区域各占50%左右，但正影响程度较小，以负影响为主；河流以正影响为主，负影响区域主要分布在县域东南部分地区。交通因素对耕地细碎化程度的正负影响区域大体相当，影响强度也较为相似。
- Abstract:
- We took Lulong County as an example, from the principle of landscape ecology average land area index (MPS). We constructed the index system，and evaluated the degree of cultivated land fragmentation in Lulong County based on the number of patch fragmentation index (FN), the average nearest neighbor distance (MNN), edge density index (ED), area weighted shape index (AWMSI) 5 landscape indexes, and then analyzed the influencing factors of cultivated land fragmentation by the geographically weighted regression model. The results showed that the arable land fragmentation in Lulong County was at a low level. The arable lands were seriously fragmented, and mainly distributed in 61 villages of all villages of Lulong County in the southwest, southeast and northern areas of Lulong County; the arable lands were moderately fragmented, mainly distributed in 232 villages in the southeast, southwest and central part of the county; the arable lands were slightly fragmented, mainly distributed in 289 villages in the central and southern parts of the county. The spatial correlation of cultivated land fragmentation in Lulong County was positive, and it also showed obvious spatial clustering characteristics. The influence degree of slope, residential land, river and traffic on the degree of cultivated land fragmentation had spatial nonstationarity. The influence degree of slope was mainly positive, and only a few areas had negative influence; the areas of the positive and negative impacts of residential land on arable land fragmentation accounted for about 50%, but the positive impact degree was small, and the negative effect was significant. The river dominated by positive effect, negative effect area mainly distributed in parts of southeast of the county. The areas of positive and negative influence of traffic factors on cultivated land fragmentation were roughly the same, and the impact intensity was similar.
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备注/Memo
收稿日期:2017-12-07;改回日期:2017-12-24。
作者简介:臧亮(1990-),男,河北保定人,硕士研究生,研究方向为土地评估。E-mail:541284192@qq.com