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结合野外调查和室内分析,研究了侵蚀红壤区不同水土保持措施下坡地土壤pH值和养分含量的变化,分析了不同水土保持措施的土壤改良效果。研究结果表明,不同水土保持措施显著影响侵蚀红壤区坡地土壤pH值和有机质、全氮、碱解氮、全磷、速效磷的含量,但是对全钾和速效钾含量影响不显著。牧草和耕作措施可以显著提高土壤pH值和有机质、全氮、碱解氮、全磷、速效磷的含量,显著改善土壤肥力状况,梯田对土壤肥力状况影响不显著。研究区土壤肥力状况不受钾素限制,可以将土壤有机质作为衡量土壤肥力状况的简化指标。
Based on the field investigation and indoor analysis, the changes of soil pH value and nutrient content in the sloping land under different soil and water conservation measures in red soil area were studied, and the soil improvement effects of different soil and water conservation measures were analyzed. The results showed that different measures of soil and water conservation significantly affected soil pH, soil organic matter, total nitrogen, available nitrogen, total phosphorus and available phosphorus in sloping red soil, but had no significant effect on total potassium and available potassium. Forage and tillage measures can significantly increase soil pH and organic matter, total nitrogen, available nitrogen, total phosphorus, available phosphorus content, significantly improve the status of soil fertility, terraces on soil fertility conditions insignificant. The status of soil fertility in the study area is not restricted by the potassium, and soil organic matter can be used as a simplified indicator to measure the status of soil fertility.