灌溉排水学报2017，Vol.36Issue(9)：62-68,7.DOI:10.13522/j.cnki.ggps.2017.09.012
土壤水分对半干旱区石灰性土壤有机碳矿化的影响
Effect of Soil Moisture on Mineralization of Soil Carbonin Calcareous Soils in the Semi-arid Regions of China
摘要
Abstract
This paper studied the impact of soil moisture on mineralization of organic carbon (SOC) mineralization in calcareous soils inthe semi-arid region of northern China.During the experiment,the temperature was kept at constant and the soil moisture varied from 40％ to 100％ of water holding capacity of the soils (WHC).Three calcareous soils-chestnut soil,chestnut brown soil and cinnamon soil-were examined.The results showed that the cumulative mineralization and the mineralization rate of SOC in maize and orchard fields in the three calcareous soils all increased with soil moisture,but the increase in the high moisture treatments,70％～100％ WHC,was less than those in the low moisture treatments,40％～70％ WHC.The SOC mineralization was well described by the first-order kinetics,where the soil organic carbon (Cp) varied from 33.10 to 193.56 mg/kg and the mineralization rate (Cp/SOC) varied from 0.41％ to 3.35％ respectively.Both Cp and Cp/SOC increased with soil moisture.Similarly,the increase in Cp and Cp/SOC in the high moisture treatments was higher than those in the low moisture treatments.The Cp/SOC was negatively correlated with SOC and clay content (P＜0.05) under 40％ and 70％ and 100％ of WHC.In conclusion,the soil moisture has a great impact on soil organic carbon mineralization and carbon sequestration.关键词
土壤水分/土壤有机碳矿化/栗钙土/栗褐土/褐土Key words
soil moisture/soil organic carbon mineralization/chestnut soil/chestnut brown soil/cinnamon soil分类
农业科技引用本文复制引用
贾俊仙,蔚耀洲,张健,许剑敏,张亚丽,赵艳,洪坚平..土壤水分对半干旱区石灰性土壤有机碳矿化的影响[J].灌溉排水学报,2017,36(9):62-68,7.基金项目
山西省自然科学基金项目(2012011033-7) （2012011033-7）
土壤与农业可持续发展国家重点实验室开放基金课题(0812201222) （0812201222）
山西农业大学博士后基金项目(134849) （134849）
山西农业大学引进人才科研启动项目(XB2010007) （XB2010007）
