干旱区生态环境知识资源中心(Arid): 西北干旱区两种不同栽培管理措施下棉田CH_4和N

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	西北干旱区两种不同栽培管理措施下棉田CH_4和N_2O排放通量研究
其他题名	CH_4 AND N_2O FLUXES FROM COTTON FIELDS DIFFERENT IN FARMING PRACTICES IN NORTHWESTERN CHINA
	李志国 1; 张润花 2; 赖冬梅 1; 闫正跃 3; 田长彦 1
来源期刊	土壤学报
ISSN	0564-3929
出版年	2012
卷号	49 期号:5 页码:924-934
中文摘要	采用静态箱-气相色谱法对西北干旱区当前普遍采用的膜下滴灌和传统的无膜漫灌两种栽培管理下土壤CH_4和N_2O通量日变化和季节变化特征进行了研究。结果表明,随时间的推移,无膜漫灌栽培管理措施下棉田土壤CH_4日变化通量呈先降后升趋势,而膜下滴灌栽培处理CH_4排放通量日变化则呈现先升后降趋势;在整个生长季节,无膜漫灌和膜下滴灌土壤CH4季节变化规律不太明显,前者吸收大气CH_4 45.2~52.5 mg m~(-2) a~(-1),后者释放CH_4通量为0.7~23.1 mg m~(-2) a~(-1)。两种栽培管理措施下棉田土壤N_2O通量的日变化和季节变化均随时间的推移均呈现先升后降趋势,但是,无膜漫灌日均排放N_2O通量显著高于膜下滴灌。在整个生长季节,无膜漫灌土壤N_2O释放量(N_2O 99.3~320.0 mg m~(-2) a~(-1))显著高于膜下滴灌(N_2O60.0~259.0 mg m~(-2) a~(-1))。以上结果说明,膜下滴灌栽培管理措施可以改变旱田传统无膜漫灌栽培土壤与大气CH4的交换方向,促进土壤CH_4向大气的排放,但对N_2O通量日变化和季节变化规律不产生影响,显著降低土壤N_2O的排放量。
英文摘要	Currently,limited information is available regarding the effects of different farmland management practices on fluxes of methane(CH_4) and nitrous oxide(N_2O) from the fields.In this study,diurnal and seasonal variations of CH_4 and N_2O fluxes from fields under different farming practices,i.e.nowadays commonly used mulched drip irrigation(MD) and traditional mulch-free flood-irrigation(MFF),were monitored with closed static chambers and a modified gas chromatograph(HP4890).This study was conducted in a cotton field in Xinjiang,Northwestern China.Results show that the diurnal variations of CH_4 in treatments MFF and MD were in sharp contrast.In the former CH_4 flux descended first and then ascended,while in the latter it proceeded reversely.Over the whole cotton growing season,however,it had no clear pattern to follow.The soil in the former absorbed a total of CH_4 0.7~23.1 mg m~(-2) a~(-1) from the atmosphere,while the soil in the latter released a total of CH_4 45.2~52.5 mg m~(-2) a~(-1).As for N_2O fluxes,the two treatments exhibited similar diurnal and seasonal patterns of a curve going up first and down later.However,in treatment MFF daily N_2O flux was much higher than in treatment MD.Over the whole cotton growing season,the total N_2O emission was higher in treatment MFF(N_2O 99.3~320.0 mg m~(-2) a~(-1)) than in treatment MD(N_2O 60.0~259.0 mg m~(-2) a~(-1)).All the findings suggest that the MD system could alter the direction of the CH_4 flux between the soil and the atmosphere of field agro-ecosystem in the arid region.It enhanced considerably CH_4 emission,but did not affect much the diurnal or seasonal variation of N_2O fluxes,however,it did reduce N_2O emission from the soil quite significantly.
中文关键词	膜下滴灌 ; 无膜漫灌 ; 农田管理措施 ; 静态箱
英文关键词	CH_4 N_2O Mulched drip-irrigation Mulch-free flood-irrigation Farmland management practices CH_4 N_2O Closed static chamber
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:4648631
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/2XILL650/228683
作者单位	1.中国科学院新疆生态与地理研究所阜康生态试验站, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.武汉市蔬菜科学研究所, 武汉, 湖北 430065, 中国; 3.防城港出入境检验检疫局, 防城港, 广西 538001, 中国
推荐引用方式 GB/T 7714	李志国,张润花,赖冬梅,等. 西北干旱区两种不同栽培管理措施下棉田CH_4和N_2O排放通量研究[J]. 中国科学院新疆生态与地理研究所,2012,49(5):924-934.
APA	李志国,张润花,赖冬梅,闫正跃,&田长彦.(2012).西北干旱区两种不同栽培管理措施下棉田CH_4和N_2O排放通量研究.土壤学报,49(5),924-934.
MLA	李志国,et al."西北干旱区两种不同栽培管理措施下棉田CH_4和N_2O排放通量研究".土壤学报 49.5(2012):924-934.