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近20多年来,由于大量施用化肥而较少施用或不施用有机肥,导致土壤有机质含量下降较为迅速。1984年全国第二次土壤普查该县土壤有机质平均在4.41%,到2005年全国测土配方施肥行动化验,土壤有机质平均含量在2.96%,下降了1.45个百分点,速度惊人。由于土壤有机质消耗过快,因此采取有效措施,提升土壤有机质含量势在必行。
In the recent 20 years, due to the large amount of chemical fertilizers, the application of organic fertilizers with little or no application of organic fertilizers resulted in the rapid decline of soil organic matter content. In 1984 the second national soil survey of soil organic matter in the county average of 4.41%, by 2005 the national soil testing and fertilizer action test, the average content of soil organic matter at 2.96%, down 1.45 percentage points, the alarming rate. Due to the excessive consumption of soil organic matter, it is imperative to take effective measures to enhance the content of soil organic matter.