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红壤处于高温多湿的热带、亚热带生物气候条件下,有机物质矿化快,积累缓慢。土壤有机质含量偏低,特别是垦殖后的耕地有机质含量更是急剧下降。一般低产红壤有机质含量在1％左右,有的更低。亩产千斤的高产红壤有机质含量多在3％以上。有机质含量高低在一定程度上可以作为红壤的肥力指标之一。但有的红壤有机质含量高达4％以上,而产量仍属不高;或有机质含量不高的土壤,大量施用有机肥料后,土壤有机质并无明显积累,而产量却成倍增加。因此,进一步研究红壤腐殖质组成与土壤肥力的关系具有重要的意义。本研究是在三种不同肥力水平红壤定位试验年的基础上进行的。迄已三年。
Red soil in the hot and humid tropical, subtropical bioclimatic conditions, mineralization of mineral quickly, slow accumulation. Soil organic matter content is low, especially after cultivated land organic matter content is a sharp decline. Generally low yield red soil organic matter content of about 1%, and some lower. Produced per kilogram of high yield red soil organic matter content more than 3%. To some extent, the content of organic matter can be used as one of the indicators of fertility in red soil. However, some red soil organic matter content as high as 4% or more, and the yield is still not high; or organic matter content is not high in the soil, large organic fertilizer application, the soil organic matter did not significantly accumulated, while the yield has doubled. Therefore, further study on the relationship between humus composition and soil fertility in red soil is of great significance. This study was conducted on the basis of three years of red soil orientation test at different fertility levels. As of three years.