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为明确秸秆全量还田对改善耕层土壤物理、化学性状的影响,扬州市在50个秸秆全量还田长期定位监测点基础上分析了2006—2010年的数据。结果显示:秸秆全量还田比对照(不还田)土壤有机质、有效磷、速效钾分别提高了9.6 g/kg、4.2 mg/kg、29 mg/kg,土壤容重比对照降低了0.27 g/cm3。秸秆全量还田能增加土壤的保水能力,提高产量和耕地质量。
In order to clarify the effect of straw returning to soil on the physical and chemical properties of topsoil, Yangzhou City analyzed the data from 2006 to 2010 on the basis of 50 straw long-term monitoring sites. The results showed that soil organic matter, available phosphorus and available potassium were increased by 9.6 g / kg, 4.2 mg / kg and 29 mg / kg, respectively, and soil bulk density was reduced by 0.27 g / cm3 compared with the control . Full straw back to the soil can increase the water retention capacity and improve the quality of arable land.