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Effects of Intercropping Patterns on Physicochemical Properties of Red Soil and Soybean Qualities
LIHuajian, DENGGuojun, LUOZhenyuan, NONGQuandong, LIChunqing, NONGBin, CHENBiqin, HUXiaozhang, LIUNa, WENHeming
Effects of Intercropping Patterns on Physicochemical Properties of Red Soil and Soybean Qualities
The aims are to explore the effects of different soybean planting patterns on the physicochemical properties of red soil and soybean quality and identify suitable planting patterns for soybeans, providing theoretical basis for improving the physicochemical properties of red soil and the nutritional quality of soybeans, and guide production practice. The one-way ANOVA method was used to compare and analyze the effects of different planting modes of soybean monoculture, maize-soybean intercropping and cassava-soybean intercropping on the physicochemical properties (pH, electrical conductivity and organic matter, hydrolytic nitrogen, total phosphorus, and available potassium contents) of red soil and the nutritional qualities (sugar, crude protein and fat contents) of soybean. The PLSR analysis method was used to explore the relationship between the physicochemical properties of red soil and soybean qualities. The pH, electrical conductivity, hydrolytic nitrogen, crude protein and fat content of cassava-soybean intercropping were significantly higher than those of soybean monoculture (P<0.05), and their organic matter and available potassium contents were also relatively higher. The PLS2 analysis results showed that there was a significant correlation between the pH and electrical conductivity of red soil and quality indicators of soybeans. The PLS1 analysis further found that there was a significant negative correlation between electrical conductivity and sugar content, and a significant positive correlation with crude fat content; the pH and electrical conductivity of red soil are positively correlated with the crude protein content of soybeans(P<0.05). The pH and electrical conductivity of soil have a significant impact on the quality of soybeans. Cassava-soybean intercropping has a positive effect on improving the pH and electrical conductivity of red soil as well as improving the nutritional quality of soybean. The planting mode is superior to maize-soybean intercropping.
soybean / intercropping / soil physicochemical properties of red soil / nutritional quality / partial least squares regression / planting pattern {{custom_keyword}} /
表1 试验地土壤理化指标 |
水分/% | pH | 电导率/(μs/cm) | 有机质/(g/kg) | 水解性氮/(mg/kg) | 全磷/(g/kg) | 速效钾/(mg/kg) |
---|---|---|---|---|---|---|
18.25 | 6.25 | 69.12 | 28.74 | 143.28 | 0.69 | 119.80 |
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