镇赉县土地利用结构调整

基于遥感与GIS进行吉林省镇赉县土地利用现状调查与生态适宜性评价, 通过分析二者差异提出土地利用调整方向及对策, 进一步优化土地利用结构。研究结果显示, 镇赉县宜林地和宜牧地的利用现状主要是盐碱地, 其次为耕地, 很少用于林地与草地; 宜农地和宜农、林、牧地利用格局单一, 耕林草比例不合理; 土地利用结构调整方向为盐碱地治理、退耕还林还草与土地利用格局优化。结合自然环境特点分析, 调整后的土地利用模式有农林复合、林草复合及开发水田等3种, 农、林、牧用地比例接近3∶1∶1, 空间格局交替安排。

Adjustment of land utilization structure in Zhenlai County

Land utilization status investigation and ecological suitability assessment of Zhenlai County in Jilin Province have been carried out based on RS and GIS. Analyzing the differences between the two aspects, the authors pointed out the adjustment direction and method of land utilization, and further optimized the land utilization structure. The results show that the utilization status of suitable forestland and suitable rangeland are mainly saline field, and the others are farmland, while rarely used forest and grassland. The suitable farmland and suitable farmland-forestland-rangeland are simple in structures, the farmland, forestland and grassland is unreasonable in proportion. The adjustment direction of land utilization is the treatment to saline field, returning farmland to forestland and grassland, and optimization on the land utilization pattern. Combined with the analysis of natural environment, the adjusted land utilization patterns include the compositions of farmland-forestland and forestland-grassland, with development of paddy fields; the proportion of farmland, forestland and grassland is close to 3∶ 1∶ 1, and the alternate distribution in space.