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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1. 不同地力等级坡耕地土壤物理指标及农作物产量变化特征
不同大写字母表示同一垂直层次不同地力等级差异显著（P<0.05）

Fig. 1. Soil physical indicators and crop yield variation characteristics of sloping farmland with different productivity grade of cultivated land
Different capital letters represent significant differences in different soil fertility grades at the same vertical level (P<0.05)