水土保持学报2012，Vol.26Issue(1)：179-183,5.
梯田土壤有机碳密度分布及影响因素
Distribution and Affecting Factors of Soil Organic Carbon Density in Terraced Fields
摘要
Abstract
Study on distribution and affecting factors of soil organic carbon（SOC） density in hilly area under different land use type will contribute to technique researches for soil fertility and soil productivity improvement.Through the centralized sampling,the paper analyzed SOC density and affecting factors of paddy field,dry land,orchard and tea plantation in hilly area of southeastern China.The results showed that the overall mean of SOC content in the surface layer（0-20 cm） was 4.14 kg/m2,which change was effected mainly by landscape,land use type and soil chemical properties.The mean of SOC density at 200～800 m was 4.38 kg/m2,which was larger than that for soils from other height.The SOC density followed the variety trend of 2°～6°6°～15°15°～25°0～2°above 25°,which was the higher in south and north slope than that in east and west slope.The SOC density was the highest in orchard,followed by tea plantation,paddy field and dry land.SOC density in paddy field had a significantly positive correlation with available nitrogen,available phosphorus,available potassium,respectively,which had a significantly negative correlation with slowly available potassium.SOC density in dry land had a significantly positive correlation with available phosphorus and available potassium;that in orchard had a significantly positive correlation with available nitrogen and available potassium;that in tea plantation had a significantly positive correlation with available nitrogen.关键词
土壤有机碳密度/空间分布/影响因素/梯田Key words
soil organic carbon density/spatial distribution/affecting factors/terraced fields分类
农业科技引用本文复制引用
李凤博,蓝月相,徐春春,陈和义,周锡跃,方福平..梯田土壤有机碳密度分布及影响因素[J].水土保持学报,2012,26(1):179-183,5.基金项目
国家自然科学基金 （）
浙江省自然科学基金 （）
