干旱区生态环境知识资源中心(Arid): 土壤水分对半干旱区石灰性土壤有机碳矿化的影响

Arid

	土壤水分对半干旱区石灰性土壤有机碳矿化的影响
其他题名	Effect of Soil Moisture on Mineralization of Soil Carbonin Calcareous Soils in the Semi-arid Regions of China
	贾俊仙 1; 蔚耀洲 2; 张健 2; 许剑敏 2; 张亚丽 2; 赵艳 2; 洪坚平 2
来源期刊	灌溉排水学报
ISSN	1672-3317
出版年	2017
卷号	36 期号:9 页码:62-68
中文摘要	为明确土壤水分对我国北方半干旱区域石灰性土壤有机碳矿化的影响,采用室内恒温培育试验,以栗钙土、栗褐土、褐土为研究对象,研究了不同土壤水分条件下土壌有机碳(SOC)矿化差异。土壤含水率设置为田间持水率 (WHC)的40%、70%和100%。结果表明,随着土壤含水率升高,3类土壤2种利用方式(玉米地、果园)土壤有机碳累积矿化量及矿化率增大,较高水分下的增幅(70%WHC~100%WHC)小于较低水分下的增幅(40%WHC~70%WHC);土壤有机碳矿化动态符合一级动力学方程,土壤潜在矿化碳库(Cp)为33.10~193.56 mg/kg,潜在矿化率Cp/SOC为0.41 %~3.35%,Cp及Ct/SOC随土壤合水率升高而增大,Cp及Cp/SOC较高水分条件下的增幅较小:40% WHC下 Cp/SOC与土壤有机碳量显著负相关,70%WHC及100%WHC下则与土壤有机碳量及黏粒量显著负相关(P< 0.05)。半干旱区域石灰性土壤有机碳矿化及土壤有机碳固存能力在较低水分条件下(40%WHC~70%WHC)受土壤水分变化影响较大。
英文摘要	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.
中文关键词	土壤水分:土壤有机碳矿化:栗钙土 ; 栗褐土:褐土
英文关键词	soil moisture soil organic carbon mineralization chestnut soil chestnut brown soil cinnamon soil
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6063003
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236124
作者单位	1.山西农业大学, 土壌与农业可持续发展国家重点实验室, 太谷, 山西 030801, 中国; 2.山西农业大学, 太谷, 山西 030801, 中国
推荐引用方式 GB/T 7714	贾俊仙,蔚耀洲,张健,等. 土壤水分对半干旱区石灰性土壤有机碳矿化的影响[J],2017,36(9):62-68.
APA	贾俊仙.,蔚耀洲.,张健.,许剑敏.,张亚丽.,...&洪坚平.(2017).土壤水分对半干旱区石灰性土壤有机碳矿化的影响.灌溉排水学报,36(9),62-68.
MLA	贾俊仙,et al."土壤水分对半干旱区石灰性土壤有机碳矿化的影响".灌溉排水学报 36.9(2017):62-68.