干旱区生态环境知识资源中心(Arid): 干湿交替对新疆绿洲农田土壤CO

Arid

	干湿交替对新疆绿洲农田土壤CO_2排放的影响
其他题名	Effects of Alternate Drying and Wetting on Soil CO_2 Emissions in Oasis Farmland of Xinjiang Region
	牛百成; 赵成义; 冯广龙; 唐钢梁
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2016
卷号	36 期号:3 页码:74-80
中文摘要	[目的]分析不同土壤水分变化及干湿交替对土壤CO_2排放的影响,为绿洲农田土壤碳循环提供科学依据。[方法]选取新疆绿洲棉田土壤,通过室内控制模拟试验,以及用气相色谱仪分析CO_2浓度。 [结果](1)与60%WFPS(土壤充水孔隙度)相比,40%WFPS对土壤CO_2排放起到了显著的抑制作用(p<0.05),而80%WFPS对土壤CO_2排放无显著性影响(p<0.05)。培养结束时,与60%WFPS的土壤CO_2累积排放量相比,40%WFPS的土壤CO_2累积排放量降低26%(p<0.05),而80%WFPS的土壤CO_2累积排放量仅增加0.04%(p>0.05)。(2)多次干湿交替循环后,干湿交替处理下的土壤CO_2累积排放量显著低于恒湿处理。在不同干旱强度处理中,重度干旱(SD)处理对土壤CO_2排放速率响应程度大于适度干旱(MD)处理,但多次干湿交替循环后,SD处理下的土壤CO_2累积排放量却显著小于MD处理。随干湿交替循环次数的增加,干湿交替对土壤CO_2排放速率的影响显著降低,特别是对土壤CO_2排放速率最高值的影响最大。[结论]在新疆绿洲棉田土壤中,干湿交替能降低土壤CO_2排放量,降低量随干旱强度的增大而增大。
英文摘要	[Objective]To evaluate the effects of soil water change and alternate drying and wetting on soil CO_2 emissions in order to provide basis for soil carbon cycle in oasis farmland.[Methods]Soil samples were taken from oasis farmland in Xinjiang region,which was used for incubation experiment in laboratory.CO_2 concentration was analyzed by meteorological chromatograph.[Results](1)Compared with 60% WFPS (water filling soil porosity),40% WFPS had a significant inhibiting effect on soil CO_2 emissions(p<0.05), while 80% WFPS was no significant influence on soil CO_2 emissions(p<0.05).At the end of the experiment, compared with 60% WFPS,accumulation of soil CO_2 emissions of 40% WFPS was reduced by 26% (p<0.05),while accumulation of soil CO_2 emissions of 80% WFPS was increased by 0.04%(p>0.05). (2)After multiple wet dry cycling,soil CO_2 accumulative emissions under alternate drying and wetting condition was significant lower than that of constant moisture treatment(p<0.05).Under different drought intensity,the effect of severe drought on soil CO_2 emission rate was higher than that of the moderate drought.But after multiple wet dry cycling,the effect of severe drought on the accumulation of soil CO_2 emissions was lower than that of moderate drought(p<0.05).With the increased of drying and wetting alternation,the effects on soil CO_2 emission rate was reduced significantly,especially for maximum soil CO_2 emission rate.[Conclusion]Drying and wetting alternation can reduce soil CO_2 emissions,and the amount of reduction increases with the increasing of drought intensity in Xinjiang oasis soil.
中文关键词	绿洲农田 ; 土壤水分 ; 干湿交替 ; 土壤CO_2排放
英文关键词	oasis farmland soil moisture drying and wetting alternation soil CO_2 emissions
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:5743465
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234940
作者单位	中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	牛百成,赵成义,冯广龙,等. 干湿交替对新疆绿洲农田土壤CO_2排放的影响[J]. 中国科学院新疆生态与地理研究所,2016,36(3):74-80.
APA	牛百成,赵成义,冯广龙,&唐钢梁.(2016).干湿交替对新疆绿洲农田土壤CO_2排放的影响.水土保持通报,36(3),74-80.
MLA	牛百成,et al."干湿交替对新疆绿洲农田土壤CO_2排放的影响".水土保持通报 36.3(2016):74-80.