干旱区生态环境知识资源中心(Arid): 干旱区绿洲棉田土壤CO

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	干旱区绿洲棉田土壤CO_2通量变化特征及温湿度影响分析
其他题名	Studies of Soil CO_2 Flux and Influencing Factors in Oasis Cotton Field of the Arid Area
	曹兴 1; 陈荣毅 2; 季枫 3; 樊新燕 3; 杨举芳 1
来源期刊	中国农学通报
ISSN	1000-6850
出版年	2012
卷号	28 期号:8 页码:199-207
中文摘要	为了研究不同管理模式下干旱区绿洲棉田土壤CO_2通量差异以及与土壤温湿度间的关系,可以为评价绿洲棉田生态系统对大气CO_2的源/汇贡献提供参考依据。采用Li-8100土壤碳通量测量系统对天山北坡中段绿洲棉田土壤CO_2通量进行动态测定,分析了土壤CO_2通量的日、月变化特征及温湿度的影响。结果表明:在2009年510月土壤CO_2通量日变化和月变化过程均为单峰型。滴灌地、漫灌地、弃耕地的土壤CO_2通量(晴天)日均值分别为3.45、3.37、1.63mumol/(m2.s);峰值出现在15:0020:00,谷值出现在4:006:00,6、7月土壤CO_2通量高于其他月份;土壤CO_2通量与温度呈不同程度的指数正相关性,气温、5cm地温较好地解释土壤CO_2通量的变异量。土壤CO_2通量与土壤湿度的相关性随着深度的变化表现不一;降水、灌溉等湿润事件对土壤CO_2通量具有促进作用,多元回归分析模型可以解释67.4%的棉田、79.6%弃耕地土壤CO_2通量受温度和湿度的共同控制。
英文摘要	Study on soil CO 2 flux of oasis cropland in arid area under different management mode and relationship with soil temperature and humidity.This study provided reference for CO 2 contribution of oasis cropland ecosystem to atmospheric.Using LI-8100 Automated Soil CO 2 Flux System,we determined the rate of soil carbon dioxide emission in oasis cotton field in the north of Tianshan Mountain,we also evaluated the influence of temperature and soil moisture on soil CO 2 flux.The results indicated that:the diurnal fluctuation and monthly variation of soil CO 2 flux was characterized by single-peaked curve for the farmland.The average rate of soil CO 2 flux per month:drip irrigation field was 3.45 mumol/(m 2.s),flooding field was 3.37 mumol/(m 2.s),abandoned farmland was 1.63 mumol/(m 2.s).In addition,the peak of rate of soil CO 2 flux appeared at about 15:00 to 20:00(Beijing time),and the valley value occurred at about 4:00 to 6:00.And soil CO 2 flux was higher in June and July than other months.Correlation analysis showed that:exponential relationship between the rate of soil CO 2 flux and temperature in different field,5 cm ground temperature and air temperature showed positive correlation.But the soil CO 2 flux represents different correlation with soil moisture from 0 cm to 20 cm and the correlation with soil moisture weaken with soil depth at 10 cm,20 cm.Furthermore,the rate of soil CO 2 flux sites tended to increase rapidly after typical wetting events(rainfall and irrigation).Soil temperature and moisture together controlled the soil CO 2 flux,and explained 67.4% of the variance in cotton field and 79.6% in abandoned farmland.
中文关键词	干旱区 ; 绿洲棉田 ; 土壤呼吸 ; 特征 ; 因子
英文关键词	arid zone oasis cotton field soil respiration character factors
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:4496992
来源机构	中国气象局乌鲁木齐沙漠气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228920
作者单位	1.新疆乌鲁木齐市气象局, 乌鲁木齐, 新疆 830000, 中国; 2.中国气象局乌鲁木齐沙漠气象研究所, 乌鲁木齐, 新疆 830002, 中国; 3.乌兰乌苏农业气象试验站, 石河子, 新疆 832100, 中国
推荐引用方式 GB/T 7714	曹兴,陈荣毅,季枫,等. 干旱区绿洲棉田土壤CO_2通量变化特征及温湿度影响分析[J]. 中国气象局乌鲁木齐沙漠气象研究所,2012,28(8):199-207.
APA	曹兴,陈荣毅,季枫,樊新燕,&杨举芳.(2012).干旱区绿洲棉田土壤CO_2通量变化特征及温湿度影响分析.中国农学通报,28(8),199-207.
MLA	曹兴,et al."干旱区绿洲棉田土壤CO_2通量变化特征及温湿度影响分析".中国农学通报 28.8(2012):199-207.