紫色土坡耕地耕层质量障碍特征
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宋鸽,史东梅,曾小英,蒋光毅,江娜,叶青
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Quality Barrier Characteristics of Cultivated Layer for Sloping Farmland in Purple Hilly Region
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Ge SONG,DongMei SHI,XiaoYing ZENG,GuangYi JIANG,Na JIANG,Qing YE
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表2 S型、反S型隶属函数、参数及权重
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Table 2 S-type and anti-S-type membership functions, parameters and weights
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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 |
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