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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2. 不同地力等级坡耕地土壤肥力指标变化特征
不同小写字母表示同一地力等级不同垂直层次差异显著（P<0.05）。图3同

Fig. 2. Variation characteristics of soil fertility index of sloping farmland with different productivity grades of cultivated land
Different lowercase letters represent significant differences in different vertical levels of the same soil fertility grade (P<0.05). The same as Fig.3