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紫色土坡耕地耕层质量障碍特征
宋鸽1,史东梅1,曾小英2,蒋光毅3,江娜1,叶青1
Quality Barrier Characteristics of Cultivated Layer for Sloping Farmland in Purple Hilly Region
Ge SONG1,DongMei SHI1,XiaoYing ZENG2,GuangYi JIANG3,Na JIANG1,Qing YE1

图3. 不同地力等级坡耕地土壤质量指数变化特征

Fig. 3. Variation characteristics of soil quality index of sloping farmland with different productivity grades of cultivated land