摘要
以贵州省云台山森林土壤为研究对象,在保证采样点具有典型性和代表性的基础上,采集混合样和土壤剖面(0～60 cm)样品,并对样品土壤性状特征及颗粒态有机碳和黑碳分布特征进行研究。结果表明,次生林地和草地土壤具有较高的水源涵养和水土保持功能;自然林地土壤的平均非毛管孔隙度最大;土壤毛管持水量变化为自然林地﹥草地﹥次生林地﹥耕地。土壤有机质表现为自然林地>耕地>草地>次生林地;不同林下土壤平均碱解氮含量表现为耕地>自然林地>草地>次生林地;速效磷的含量表现为耕地>草地>次生林地>自然林地。土壤中颗粒态有机碳含量及其占总有机碳的比值随剖面深度的增加而下降,其中颗粒态有机碳占总有机碳的比例耕地土壤明显低于林地土壤。
Taking forest soil of Yuntai mountain in Guizhou Province as the research object,mixed soil samples and profile soil samples （0-60 cm） from different areas were collected by ensuring the typical and representative of sample plots. The proper- ties of soil samples and distribution characteristics of particulate organic carbon（POM-C） and black carbon were studied. The results showed that secondary forest and grassland soil had high water conservation and soil conservation ability. The average value of non-capillary porosity of natural forests underground soil was the highest. Soil capillary moisture ranked as natural forest land 〉 grassland〉 secondary forest land〉 farmland. The average value of soil organic matter ranked as natural forest land 〉 farmland〉 grassland〉 secondary forest land. The average alkali-hydrolyzable nitrogen content ranked as farmland 〉natu- ral forest land 〉 grassland〉 secondary forest land. The rank of rapidly available phosphorus was farmland〉 grassland〉 secondary forest land 〉 natural forest land. Soil POM-C content and its proportion in total organic carbon decreased with the increase of soil profile depth. The ratio of POM-C to total carbon in farmland was significantly lower than that in forest soil.
出处
《湖北农业科学》
北大核心
2013年第13期3007-3010,共4页
Hubei Agricultural Sciences
基金
贵州省社发攻关项目[黔科合SY字(2012)3136]
贵州省软科学研究计划项目[黔科合体R重字(2011)2003]
贵州科学院青年基金项目[黔科院J合字(2011)08]
关键词
森林土壤
性状
颗粒态有机碳
黑碳
喀斯特地区
贵州省
forest soil
characters
particulate organic carbon
black carbon
karst region
Guizhou province
