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【目的】探讨长期不同施肥措施对灰漠土有机质及物理性质的影响,阐明土壤物理性状的演变特征,以期为干旱区土壤培肥提供参考。【方法】以22 a的长期定位施肥试验为基础,选择其中6个施肥处理的当季土壤样品,测试土壤有机质、容重、总孔隙度、饱和含水量、田间持水量、含水量指标,并将测试结果与基础土壤数据进行对比分析。【结果】与CK相比,施肥可提高土壤有机质和总孔隙度,长期配施有机肥和秸秆还可以降低土壤容重、提高土壤饱和含水量;长期单施化肥(氮磷钾、氮磷)容重升高,田间持水量有提高趋势。【结论】施肥能改善或维持灰漠土土壤的有机质及物理性质,施有机肥是最有效的手段;秸秆还田表层土壤孔隙大,土壤易干旱;单施化肥土壤表层容重增大、孔隙度减少。
【Objective】 The objective of this study was to investigate the effect of long-term fertilization on the organic matter and physical properties of gray desert soils and to elucidate the evolution characteristics of soil physical properties in order to provide reference for soil fertility improvement in arid regions. 【Method】 Based on the long-term fertilization experiment of 22 years, 6 soil fertilizers were selected to test soil organic matter, bulk density, total porosity, saturated water content, field water content and water content index The test results are compared with the basic soil data. 【Result】 Compared with CK, fertilization could increase soil organic matter and total porosity. Long-term application of organic manure and straw could also reduce soil bulk density and soil saturated moisture content. Long-term application of chemical fertilizers (NPK, N and P) Increase, field water capacity has increased. 【Conclusion】 Fertilization can improve or maintain the organic matter and physical properties of gray desert soils. Application of organic manure is the most effective way to fertilize soil. cut back.