黄土高原沟壑区不同施肥下植物对土壤容重和孔隙度的影响

Effect of Plants at Different Fertilization Treatments on Soil Bulk Density and Porosity in the Gully Region of Loess Plateau

土壤容重与孔隙度影响土壤养分的有效性及作物生长,与耕作、施肥、灌溉等农业管理措施密切相关。为了研究设施农业条件下土壤环境质量的变化,探索较优施肥模式,以长武试验站王东沟模拟弃土场土壤为对象,以不施化肥和有机肥的土壤为对照,研究不同施肥下植物对土壤容重和孔隙度的影响。结果表明:在种植白三叶、草木樨等7种作物的条件下,不施肥、施有机肥、施秸秆均能明显降低弃土场0-20cm土壤容重、提高孔隙度,改善弃土场土壤物理结构,有利于弃土场的土壤肥力改良。

Soil bulk density and porosity can affect the effectiveness of soil nutrients and plant growth,and are closely related to tillage,fertilization,irrigation and other agricultural management practices.In order to study changes in soil environmental quality under agricultural facilities and explore the optimum fertilization model Wangdonggou in Changwu Experiment Station was simulated as the abandoned site.The effect of plant under different fertilization on soil bulk density and porosity was researched.The results showed that planting white clover,sweet clover and other seven kinds of crops with no use of chemical fertilizer,or application of organic fertilizer or application of straw could significantly reduce soil bulk density of the spoiled soil of 0-20 cm and increase the porosity,which improved the soil property and fertility.