基于景观格局视角的土地整治对农地细碎化影响评价研究

发布时间：2018-04-25 06:24

本文选题：土地整治 + 农地细碎化　；参考：《长江流域资源与环境》2017年01期

【摘要】：以江西省宜丰县土地整治项目区为例,选择斑块类型、景观类型、廊道特征3类景观格局指数,从景观格局视角定量评价土地整治对农地细碎化的影响。研究表明:(1)水田的斑块密度由8.916 1个/hm~2下降至8.423 4个/hm~2,平均斑块面积由0.075 1 hm~2提升至0.076 9 hm~2,边缘密度由1 203.431 8降低至1 127.134 7,面积加权的平均形状因子由1.238 6下降至1.216 3,最大斑块指数由0.17%上升至0.18%,景观格局指数均得到不同程度改善;但旱地除面积加权的平均形状因子以外,其他指标均表明旱地趋于细碎化。(2)土地整治导致项目区破碎化程度加剧,斑块数量由3 530个提升至4 175个,平均斑块面积由0.070 6 hm~2增加至0.059 7 hm~2,面积加权平均形状因子由1.672 3增加至1.816 0,最大斑块指数由2.06%降低至2.01%。(3)土地整治优化了农村道理和沟渠布局,廊道特征指数均有不同程度改善。但农村道路和沟渠的修建割裂了斑块,是导致项目区破碎化程度加剧的主要原因。因此,在土地整治规划设计中需要注重旱地、农村道路、沟渠的景观格局设计,达到有效治理农地细碎化和提高土地整治景观生态效益的目的。
[Abstract]:Taking the project area of land regulation in Yifeng County, Jiangxi Province as an example, three types of landscape pattern indices, such as patch type, landscape type and corridor characteristics, were selected to quantitatively evaluate the impact of land regulation on farmland fragmentation from the perspective of landscape pattern. The results showed that the patch density decreased from 8.916 1 / hm ~ (2) to 8.423 4 / hm ~ (2), the average patch area increased from 0.075 1 hm~2 to 0.076 9 h ~ (2), the marginal density decreased from 1 203.431 8 to 1 127.134 7, and the area weighted average shape factor decreased from 1.238 6. From 1.216 to 1.216, the maximum patch index increased from 0.17% to 0.18%, and the landscape pattern index improved to some extent. However, except for the weighted average shape factor of the dryland area, all the other indexes indicated that the dryland tended to be finer, and the fragmentation degree of the project area was aggravated, and the number of patches increased from 3 530 to 4 175. The average patch area increased from 0.070 6 hm~2 to 0.059 7 h mm2, the weighted average shape factor increased from 1.672 3 to 1.816 0, and the maximum patch index decreased from 2.06% to 2.01%. The corridor characteristic index was improved to some extent. However, the construction of rural roads and ditches is the main cause of the fragmentation of the project area. Therefore, it is necessary to pay attention to the landscape pattern design of dry land, rural roads and ditches in the planning and design of land regulation, in order to effectively control the fragmentation of farmland and improve the ecological benefits of landscape.
【作者单位】：江西财经大学旅游与城市管理学院土地资源管理系;
【基金】：国家自然科学基金项目(41561049) 江西省教育厅科技项目(GJJ150481) 江西省社会科学“十三五”规划项目(16GL31)~~
【分类号】：F301.2

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