基于GIS的云南山区玉米生态适宜性评价方法与应用

李超,李文峰,赵耀,尚敬敏

A Method of Ecological Suitability Evaluation and Its Application for Maize Planted in Mountain Farmland Based on GIS (Case Study: Xundian County)

LI Chao,LI WenFeng,ZHAO Yao,SHANG JingMin

表2 数值型评价指标隶属度函数

Table 2 Membership function for numeric factors

评价指标 Evaluation index 函数类型 Function type 隶属函数 Membership function 标准值 Standard value 极限值 Limit value 有机质Organic matter 戒上型Upper limit Y=1/[1+0.006889×(ui–c)2][21,24,27] 30 10 有效磷Available P 戒上型Upper limit Y=1/[1+0.00653×(ui–c)2][21,24,27] 40 3 速效钾Available K 戒上型Upper limit Y=1/[1+0.000064×(ui–c)2][21,24,27] 200 30 碱解氮Available N 戒上型Upper limit Y=1/[1+0.001335×(ui–c)2][21,24,27] 150 30 耕层厚度Tillage depth 戒上型Upper limit Y=1/[1+0.00745×(ui–c)2][28,29] 40 22 坡度Slope 戒下型Lower limit Y=1/[1+0.00496×(ui–c)2][28,29] 2.84 15 pH 峰值型Peaker Y=1/[1+0.265×(ui–c)2] [21,24,27] 5.74 4.5/8.5