摘要
对贵阳市蔬菜基地土壤的理化性质进行了区域研究,结果表明:城市化的快速发展促进了菜地土壤特性发生区域性变化,其影响趋势是城区>郊区>农区。不同区域之间的菜地土壤物理性粘粒、毛管孔隙度、非毛管孔隙度存在明显的差异,其余土壤物理性质的差异不明显。菜地土壤呈中性或弱酸性,区域之间差异不大。土壤阳离子交换量有郊区高于城区和农区的趋势,区域之间具有一定的差异,其平均值为17 cmol(+)/kg土以上,属于中上等保肥水平。城区菜地土壤有机质、全氮和碱解氮含量高于郊区和农区并达到显著性差异;城区土壤有机质均值达到117.4 g/kg,是农区土壤的3倍。菜地土壤全磷和有效磷含量有城区和郊区大于农区的趋势;而钾素含量是农区>郊区>城区。
The soil physico-chemical properties of vegetable bases in Guiyang were studied. The results show that the rapid urbanization development promotes the area change of soil characteristic of vegetable bases and the affecting trend is urban area〉suburb〉rural area. There are the significant difference in soil physical clay, capillary porosity and non-capillary porosity and no significant difference in other soil physico-chemical properties among different regional vegetable bases. The pH of the vegetable soils is neutrality or weak-acid and there is no significant difference among different areas. The CEC （Cation exchange capacity） of the suburb vegetable soil is higher than that of the urban and rural areas, there is a difference among different areas and the mean value of the soil cation exchange capacity of three different areas is above 17cmol（＋）/kg. The content of soil organic matter, total N and hydrolyzed N in urban area are higher than those in suburb and rural areas and a significant difference between them. The mean value of soil organ matter in urban area is up to 117.4 g/kg,three times of that in rural area. The contents of soil total P and available P in urban area and suburb are higher than those in rural area and the content of Potassium element in vegetable soil is rural area〉suburb〉urban area.
出处
《贵州农业科学》
CAS
2007年第1期36-39,共4页
Guizhou Agricultural Sciences
基金
贵州省自然科学基金项目"黔中菜地土壤理化属性空间变异对重金属生物有效性的影响研究"(黔科合J字[2005]2079号)
关键词
城市化
菜地土壤
土壤特性
蔬菜
生产基地
区域变化
贵阳市
urbanization
vegetable field soil
soil characteristics
vegetable
production base
area change
Guiyang
