赣县烤烟种植土地适宜性评价

An Evaluation of Suitability of the Tobacco Planting Land in Ganxian County

通过对区域烟草种植的土地适宜性进行评价,一方面可以更好的了解植烟土壤养分状况及其演变趋势,指导适宜植烟区的土壤保育和烤烟平衡施肥提供重要依据,另一方面为合理制定区域的发展规划提供理论基础,特别是经济作物的种植规划。以赣县范围内的耕地为研究对象,结合GIS强大的空间分析功能,通过对收集到的各种基础数据,如坡度、灌排条件、营养状况、耕层厚度等进行分析,再结合适宜性评价的模型,进行赣县烤烟种植土地适宜性评价,结果显示:赣县范围内以大埠乡、沙地镇、江口镇等5个乡镇为烤烟种植的一类适宜区,最适宜种植烤烟;韩坊乡、王母渡镇、阳埠乡等镇为二类适宜区,适宜种植烤烟,但产量略逊于一类适宜区;湖江乡、田村镇等划分到三类适宜区,种植烤烟会略有一些限制性因素,如排管设施落后、土壤钾含量不充分等。该结果与赣县烟草规划的重点发展区域相符合,为赣县烟叶的稳产增产提供科学的指导,同时也为土地的管理和规划提供科学的量化依据。

Evaluation of suitability tobacco planting land ,on the one hand,enables recognition of the status and its dynamic variations of principal nutrients and provides the basis for soil conservation and balanced fertiliza-tion,on the other hand,provides a theoretical basis for the reasonable formulation of regional development planning , especially for the economic crop planning.In this study,Ganxian County was taken as the study area.The suitability evaluation of tobacco planting land in Ganxian County was carried out by using GIS to deal with all kinds of culti-vated land basic datum,including slope,irrigation and drainage condition ,nutritional status and so on by means of the suitability evaluation model .The results showed that the most suitable area for planting tobacco included Dabu Township,Shadi Township,Jiangkou Town;the second suitable area included Hanfang Township ,Wangmudu Town and Yangbu Township,whose production was slightly inferior to that of the most suitable area;the third suitable area included Hujiang Township,Tiancun Town,which had some slightly restrictive factors such as old pipe facilities and lacking of soil potassium.The results are basically consistent with the key development area of tobacco planning in Ganxian County.The results provide some scientific guidance for improving tobacco production of Ganxian County , and also provide scientific quantitative basis for land management and planning .