干旱区生态环境知识资源中心(Arid): 艾比湖地区棉田、撂荒地土壤CH

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	艾比湖地区棉田、撂荒地土壤CH_4排放通量日变化规律研究
其他题名	Research on Soil CH4 Flux of Cotton Fields and Abandoned Lands in Ebinur Lake Area
	孙景鑫; 刘东; 秦璐; 张雪妮; 何学敏; 吕光辉
来源期刊	新疆农业科学
ISSN	1001-4330
出版年	2012
卷号	49 期号:8 页码:1489-1496
中文摘要	【目的】定量分析干旱区农田撂荒前后土壤甲烷(CH_4)排放通量的日变化,着重探讨影响土壤CH_4排放的环境因子,为解释人类活动对该地区农田生态系统的土壤CH_4排放的影响提供数据支持。【方法】用静态箱法结合Li-7700快速CH4分析仪(Li-7700,Li-cor Inc,USA)对艾比湖地区农田生态系统中棉田及撂荒地生长季(2010年8月)的土壤CH4排放浓度和密度进行实时测定,并分析水热因子对土壤CH_4排放的影响。【结果】棉田、撂荒地CH4排放具有较明显的昼夜变化,棉田呈双峰曲线,撂荒地呈单峰或双峰曲线。在观测时间内,10 a棉田的平均通量为2.23 mg/(m~2?h),最大值为61.01 mg/(m~2?h),最小值为-41.05 mg/(m~2.h);10 a撂荒地的平均通量为-3.90 mg/(m~2?h),最大值为50.25 mg/(m~2?h),最小值为-87.39mg/(m~2?h)。棉田、撂荒地土壤CH4排放与土壤含水量、空气相对湿度相关不显著;所有样地CH_4排放量与15、20 cm的土壤温度相关性最高(相关系数:棉田为-0.70,-0.71;撂荒地为-0.52,-0.52,P<0.01);综合考虑水分、温度因素可以解释土壤CH4排放变化的70.60%~85.61%,这比单独考虑水分或温度对土壤CH_4排放变化的解释度都高。【结论】棉田是土壤CH4微弱的源,撂荒地是土壤CH4微弱的汇,水分、温度是影响生长季棉田和撂荒地土壤CH_4排放变化最主要的环境因子。
英文摘要	【Objective】The project aimed to explore the influence of arid zone land use change on the soil CH_4 flux and focused on the environmental factors which affected soil CH_4 emissions in order to provide data support to explain the impact of human activities in farmland ecosystem soil CH_4 emissions of this area.【Method】 The concentration and density of the soil CH_4 emissions of the cotton field and abandoned land in Ebinur area were measured by using the static chamber method with Li-7700 rapid CH_4 analyzer(Li-7 700,Li-cor,Inc.,USA) in growing season(August,2010) and the heat and water factors on soil CH_4 emissions were analyzed as well.【Result】Cotton fields and abandoned land had obviously diurnal variation dynamics.Cotton fields showed double peak curve,while abandoned land showed a single peak or double peak curve.During the observation time,the average CH_4 flux of 10 a cotton land is 2.23 mg/(m~2·h),the maximum value is 61.01 mg/(m~2·h) and the minimum is-41.05 mg/(m~2·h);the average CH_4 flux of 10a abandoned land is-3.90 mg/(m~2·h),the maximum value is 50.25 mg/(m~2·h) and the minimum is-87.39 mg/(m~2·h).There was no significant relationship between soil moisture and soil CH_4 emissions.And the air relative humidity was not relevant to soil CH_4 emissions,either.The temperature of 15 cm,20 cm layer in soil had the highest correlation with the diurnal variation for all plots(cotton fields-0.70,-0.71;abandoned land-0.52,-0.52,P<0.01);Considering the water,the temperature factors can explain 70.60%-85.61% of the soil CH_4 emission changes,which surpasses the explanation of separately considering the degree of moisture or temperature changes in the soil CH_4 emissions.【Conclusion】 The cotton fields are a weak source of the soil CH_4,abandoned lands is in the weak soil CH4 sink,water and temperature are the most important environmental factors which impact soil CH_4 emissions change of cotton fields and abandoned land in the growing season.
中文关键词	撂荒地 ; 棉田 ; 土壤CH_4 ; 昼夜变化
英文关键词	abandoned lands cotton fields soil CH_4 diurnal variation
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:4649285
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228774
作者单位	新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	孙景鑫,刘东,秦璐,等. 艾比湖地区棉田、撂荒地土壤CH_4排放通量日变化规律研究[J]. 新疆大学,2012,49(8):1489-1496.
APA	孙景鑫,刘东,秦璐,张雪妮,何学敏,&吕光辉.(2012).艾比湖地区棉田、撂荒地土壤CH_4排放通量日变化规律研究.新疆农业科学,49(8),1489-1496.
MLA	孙景鑫,et al."艾比湖地区棉田、撂荒地土壤CH_4排放通量日变化规律研究".新疆农业科学 49.8(2012):1489-1496.