紫色土坡耕地耕层质量障碍特征
宋鸽,史东梅,曾小英,蒋光毅,江娜,叶青

Quality Barrier Characteristics of Cultivated Layer for Sloping Farmland in Purple Hilly Region
Ge SONG,DongMei SHI,XiaoYing ZENG,GuangYi JIANG,Na JIANG,Qing YE
表2 S型、反S型隶属函数、参数及权重
Table 2 S-type and anti-S-type membership functions, parameters and weights
指标
Index
土壤属性指标对作物
产量的作用
Effect of soil attribute index for crop yield
隶属函数
Membership function
土层
Soil layer
隶属函数参数
Membership function parameter
权重
Weight
a
(下限Lower limit)
b
(上限Up limit)
土壤有机质
Soil organic matter
(g·kg-1)
+ 耕作层 Topsoil layer 5.29 32.30 0.186
心土层 Subsoil layer 5.07 21.40 0.217
底土层 Bottom soil 3.57 16.60 0.155
土壤全氮
Soil total nitrogen
(g·kg-1)
+ 耕作层 Topsoil layer 0.41 1.54 0.184
心土层 Subsoil layer 0.35 1.08 0.183
底土层 Bottom soil 0.27 2.13 0.252
土壤有效磷
Soil available phosphorus
(mg·kg-1)
+ 耕作层 Topsoil layer 1.20 139.00 0.128
心土层 Subsoil layer 0.09 22.00 0.137
底土层 Bottom soil 0.19 123.00 0.208
阳离子交换量
Cation exchange capacity (cmol(+)·L-1)
+ 耕作层 Topsoil layer 0.08 32.10 0.155
心土层 Subsoil layer 5.38 38.70 0.140
底土层 Bottom soil 0.11 25.40 0.182
耕作层厚度
Topsoil layer thickness
(cm)
+ 耕作层 Topsoil layer 15.00 25.00 0.188
心土层 Subsoil layer - - -
底土层 Bottom soil - - -
心土层厚度
Subsoil layer thickness
(cm)
+ 耕作层 Topsoil layer - - -
心土层 Subsoil layer 5.00 30.00 0.130
底土层 Bottom soil - - -
田面坡度
Field surface slope
(°)
- 耕作层 Topsoil layer 5.00 25.00 0.158
心土层 Subsoil layer 5.00 16.00 0.193
底土层 Bottom soil 5.00 25.00 0.203