基于地块单元的甘蔗种植适宜性评价

目的]对广西崇左市江州区甘蔗种植适宜性进行评价,为甘蔗产业布局的调整提供科学依据.方法]基于广西崇左市江州区2016年甘蔗作物地块矢量数据,选取土壤、地形、气象和经济4个因子共16个评价指标,利用层次分析法及加权指数和模型评价江州区甘蔗种植适宜性,根据评价结果采用GIS技术将甘蔗种植划分为最适宜、适宜、次适宜和不适宜区域.结果]将甘蔗种植最适宜和适宜面积与部分"双高"基地(高产高糖糖料蔗基地)面积进行比较,结果显示二者差异较小,评价结果与实际情况基本吻合.崇左市江州区濑湍镇甘蔗种植最适宜区面积为3799.80 ha,占最适宜区总面积的36.90%;崇左市新和镇甘蔗种植不适宜区面积共177.85 ha,占不适宜区总面积的28.84%.结论]为了科学、合理及有效地利用土地资源,提高甘蔗产量,建议新增"双高"基地,可调整广西崇左市江州区甘蔗布局区域向濑湍镇、罗白乡、太平街道、驮卢镇和左州镇等地发展.

Sugarcane planting suitability evaluation based on block unit

Objective]Sugarcane planting suitability evaluation in Jiangzhou district, Chongzuo city, Guangxi provided a scientific basis for adjustment of sugarcane industry distribution for relevant authorities. Method]Taking Jiangzhou dis-trict, Chongzuo city in Guangxi as an example and selecting 16 evaluation indexes in categories of soil factors, topography factors, meteorological factors and economic factors, analytic hierarchy process(AHP) and the weighted index model were used to evaluate planting suitability based on vector data of sugarcane crop plot in 2016. The sugarcane cultivation areas were divided into the most suitable area, suitable area, suboptimal area and inappropriate area using GIS technology. Re-sult]The sum of the most suitable area and suitable area was close to that of high-yield and high-sugar-content sugarcane base, which indicated that the results of the evaluation were in good agreement with the actual situation. The most suitable area for sugarcane planting in Laituan township, Jiangzhou district, Chongzuo city was 3799.80 ha, accounting for 36.90%of the total most suitable area; while the unsuitable area for sugarcane planting in Xinhe township, Jiangzhou district, Chongzuo city was 177.85 ha, accounting for 28.84%of total unsuitable area. Conclusion]In order to utilize the land re-sources scientifically, rationally and effectively, and increase sugarcane production, it is proposed to construct new high-yield and high-sugar-content sugarcane base and adjust the layout area innJiangzhou district, Chongzuo city, Guangxi to townships such as Laituan, Luobai, Taipingjiedao, Tuolu and Zuozhou.