干旱区生态环境知识资源中心(Arid): 不同水肥条件对绿洲农田土壤N

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	不同水肥条件对绿洲农田土壤N_2 O排放的影响
其他题名	Effects of Different Irrigation and Fertilization Conditions on Soil N_2O Emission from Oasis Farmland
	王勇 1; 赵成义2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2018
卷号	35 期号:4 页码:938-944
中文摘要	研究土壤干湿变化对绿洲农田土壤氧化亚氮( N_2O)排放的影响,可优化绿洲农田灌溉施肥措施、减少绿洲农田土壤N_2O排放。基于室内培养试验,将100 g风干土置于730 mL马氏瓶中,放入25 ℃培养箱内培养,采用称重法严格控制施氮量和土壤含水量,通过注射器连接三通阀抽取瓶内气体,测定不同施氮量和干湿变化下绿洲农田土壤N_2O排放量,结果表明: ①土壤干湿变化显著影响农田土壤N_2O排放,未施氮情况下,干燥处理下土壤N_2O累积排放量是湿润处理下土壤N_2O累积排放量的1.28倍; ②与未施氮处理相比,施氮显著促进了土壤N_2O排放,施肥土壤N_2O排放速率在施氮后0 ~ 4 d内出现排放高峰,随后显著降低; ③施氮后湿润土壤N_2O排放速率显著高于干燥条件下的土壤N_2O排放速率( P < 0.05) ,湿润土壤N_2O累积排放量为2.07 mg·kg~(-1) ,是干燥条件下土壤N_2O累积排放量的1.16倍。因此,在绿洲农田滴灌施肥期间,适当增加滴灌施肥的时间间隔调控土壤干湿状况,可有效减少绿洲农田土壤N_2O的排放。
英文摘要	The effects of soil drying-wetting alternation on nitrous oxide ( N_2O) emission from oasis farmland were analyzed,which could provide the basis for optimizing irrigation and fertilization and reducing N_2O emission of oasis farmland. A laboratory incubation experiment was performed to determine the effect of soil drying-wetting alternation on its N_2O emission from oasis farmland in arid area. The 100 g dried soil was placed in a 730 mL mason jar, then the mason jar was placed in a 25 ℃ incubator,and the nitrogen content and soil moisture content were strictly controlled through connecting a syringe with a three-way valve to extract gas from the mason jar. The result are as follows: ① Soil drying-wetting alternation influenced significantly the cumulative N_2O emission of oasis farmland soil. Without fertilization,the cumulative N_2O emission of dryly-treated soil was 1.28 times of that of wetly-treated soil; ② Compared with non-nitrogen treatment,fertilization promoted significantly the soil N_2O emission,the highest N_2O emission occurred after nitrogen was applied for 0 - 4 days,and then the soil N_2O emission was reduced obviously; ③ The N_2O emission rate of the wetted soil was significantly higher than that of the dried soil after nitrogen was applied. The cumulative N_2O emission of wetted soil was 2.07 mg·kg~(-1),and it was 1.16 times of that of dried soil. Therefore,the soil N_2O emission from oasis farmland could be reduced by properly prolonging the time interval of drip irrigation and fertilization.
中文关键词	绿洲农田 ; 干湿变化 ; 施氮 ; N_2O排放
英文关键词	oasis farmland soil drying-wetting alternation nitrogen application N_2O emission
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6298456
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/2XILL650/237667
作者单位	1.中国科学院新疆生态与地理研究所;;中国科学院大学, 中国科学院绿洲生态与荒漠环境重点实验室;;, 乌鲁木齐;;, 新疆;;北京 830011;;100049, 中国; 2.中国科学院新疆生态与地理研究所, 中国科学院绿洲生态与荒漠环境重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	王勇,赵成义. 不同水肥条件对绿洲农田土壤N_2 O排放的影响[J]. 中国科学院新疆生态与地理研究所,2018,35(4):938-944.
APA	王勇,&赵成义.(2018).不同水肥条件对绿洲农田土壤N_2 O排放的影响.干旱区研究,35(4),938-944.
MLA	王勇,et al."不同水肥条件对绿洲农田土壤N_2 O排放的影响".干旱区研究 35.4(2018):938-944.