基于层次建模的河西灌区乡镇尺度甜叶菊种植适宜性评价  

Evaluation on Suitable Stevia Planting Area with Township Scale by Hierarchical Model in Hexi Irrigation Area

作　　者：徐喜俊 王品山 XU Xi-Jun;WANG Pin-shan(Agricultural Technology Service Center of Liangzhou District, Wuwei 733000, Gans)

机构地区：[1]甘肃省武威市凉州区农业技术推广中心,甘肃武威733000

出　　处：《中国糖料》2018年第3期43-45,共3页Sugar Crops of China

摘　　要：选取武威市永昌镇为研究区域,运用GIS软件,挂接永昌镇的甜叶菊种植相关因子数据,通过选取评价因子,建立层次模型,拟合隶属函数,采用累加法计算研究区甜叶菊的适宜性区域面积。结果表明:研究区域的甜叶菊生产适宜性的影响程度因子从大到小依次为灌溉保证率、精准施肥覆盖率、剖面构型、全氮、地块平整度、障碍层厚度、有效磷、海拔;永昌镇甜叶菊种植不存在不适宜区域,适宜性为3个等级,适宜性综合指数(IFI)区间分别为>0.5569、0.5569~0.2369和<0.2369,高度适宜等级区域面积为2338.25hm2,占全镇总耕地面积的65.93%,适宜等级区域面积为923.05 hm2,占全镇总耕地面积的26.03%,勉强适宜等级区域面积为285.32 hm2,占全镇总耕地面积的8.04%。Using GIS software,Yongchang town of Wuwei city as the study area, partition on stevia suitable planting area was studied by analysis of relative factor data, to establish hierarchical model and fit the membership function. The results showed that, in the study area, the influence factors of suitable stevia production from big to small in turn were irrigation assurance, precise fertilization coverage rate, profile shapes,total nitrogen, plot flatness, barrier layer thickness, available phosphorus and elevation. Stevia planting areas of Yongchang town was partitioned into three degrees, highly suitable, common suitable and barely suitable,and the interval of suitability index（IFI） was〉 0.5569, 0.5569-0.2369, 〈0.2369, respectively. The land area of three degrees was 2338.25 ha, 923.05 ha and 285.32 ha, which accounted for 65.93%, 26.03% and 8.04% of the total arable land in the town, respectively.

关 键 词：甜叶菊种植 适宜性预测 乡镇尺度 河西灌区 

分 类 号：S566.9[农业科学—作物学]