摘要
根据18年的长期定位试验,探讨了不同施肥处理对黄土丘陵区栗褐土土壤容重、土壤结构、孔隙性、水分物理性质以及对土壤有机质和土壤氮、磷含量的影响。结果表明,长期施用有机肥有利于保持和改善土壤孔隙状况,促进水稳性团聚体的形成,提高土壤的透水性和持水能力。单施化肥与不施肥相比,土壤物理性质有所改善,但与初始值比较则变劣。有机肥与化肥配合施用,可减轻化肥对土壤物理性质的不良影响。长期不施肥土壤物理性质有恶化趋势。单施有机肥和有机无机肥配合施用可显著提高土壤有机质和氮、磷含量,有机无机肥配合施用效果更明显,单施化肥的效果不显著。
The effects of fertilization treatments on soil bulk density, soil structure, soil porosity, soil water physical properties and contents of SOM, soil N and soil P2O5 are studied based on the 18 years long-term experiment on chestnut-cinnamon soil in loess hilly. The results show that the long-term organic fertilizer application helps maintain and improve the soil pore conditions, to bring about formation of water stable aggregate, and improve soil water infiltration and water-holding capability. Soil physical properties in treatments of inorganic fertilizer ap- plication are better than them in the treatment of no fertilization, but are worse than them in the same treatments at beginning of the experiment conducted. The application of both organic and inorganic fertilizer helps reduce the bad effect of inorganic fertilizer on soil physical property. The soil physical properties in the treatment of no fertilization are tending to deteriorate. Contents of SOM, soil N and soil P2O5 are increased significantly in the treatments of organic application only and applications both organic and inorganic fertilizer, but the effects of the later is better, and the effects of inorganic fertilizer application are not significant.
出处
《水土保持学报》
CSCD
北大核心
2006年第4期82-85,89,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金(49971040)
湖南农业大学引进人才科研启动项目(01YJ02)资助
关键词
黄土丘陵区
长期施肥
土壤理化性质
栗褐土
loess hilly area
long-term fertilization
soil physical and chemical property
chestnut-cinnamon soil
