摘要
以贵州高海拔岩溶山区天然草地、农田和人工草地为研究对象．探讨不同土地利用方式下的土壤质量状况。结果表明：研究区土壤体积质量、孔隙度、毛管持水力等性状以人工草地表现最好，天然草地次之，农田最差。研究区土壤呈强酸性，pH值在3．49-4．44之间，农田和人工草地土壤pH值明显高于天然草地，高幅达0．58-0．95。土壤有机质和全氮含量以人工草地表现较好，速效氮、速效磷和速效钾含量以天然草地表现较差。0～50cm土层土壤中微量元素密度：有效铁、有效锌和有效硼表现为天然草地〉农田〉人工草地，有效铜和有效钼表现为农田〉天然草地〉人工草地，有效锰表现为农田〉人工草地〉天然草地。
Soil quality of natural grassland, cropland and pasture in the Karst mountain area of Guizhou was compared in the study. The results showed that there were significant difference of soil physical, chemical and effective micronutrient of natural grassland, cropland and the pasture in Karst mountain region. The BD,porosity and capillary water holding in soil of study area showed better pasture than natural grassland, and cropland was the worst. The soil of study area was high-acid, pH and between 3.49-4.44. And the pH of pasture and cropland soil was higher than natural grassland. The organic matter and total nitrogen in pasture soil were better than cropland and natural grassland. The available nitrogen, available phosphorus and available potassium in natural grassland were lower than pasture and cropland. The density of available iron, zinc and boron in 0 to 50 centimeter soil was natural grassland 〉 cropland 〉 pasture. The density of available copper and molybdenum in 0 to 50 centimeter soil was cropland 〉 natural grassland 〉 pasture. The density of available manganese in 0 to 50 centimeter soil was cropland 〉 pasture 〉 natural grassland.
出处
《广东农业科学》
CAS
CSCD
北大核心
2013年第6期70-73,76,共5页
Guangdong Agricultural Sciences
基金
贵州省农业科技攻关项目(黔科合NY字[2012]3011号)
贵州省自然科学基金(黔科合J字[2011]2325号
黔科合J字[2012]2162号)
贵州大学引进人才科研项目(贵大人基合字[2010]003号)
关键词
喀斯特
生态脆弱区
土地利用
土壤肥力
微量元素密度
karst
fragile ecology region
land use
soil quality properties
soil trace element density
