干旱区生态环境知识资源中心(Arid): 棉花秸秆和氮肥对土壤CO_2和N

Arid

	棉花秸秆和氮肥对土壤CO_2和N_2 O排放及碳氮排放系数的影响
其他题名	Effects of Cotton Straw and Nitrogen Fertilizer on Soil CO_2 and N_2O Emissions and Their Coefficients
	牛百成 1; 赵成义1 ; 俞永祥 1; 谭立海 2; 安志山 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2017
卷号	34 期号:6 页码:1323-1330
中文摘要	以新疆绿洲棉田土壤为研究对象,通过室内控制试验,针对棉花秸秆结合氮肥等不同处理进行了为期63 d的CO_2和N_2O排放观测,探讨秸秆和氮肥施用对土壤有机碳和全氮含量及碳氮排放系数的影响。结果表明:秸秆显著增加CO_2和N_2O排放量,而氮肥对CO_2排放量无显著影响,但却显著增加了N_2O排放量。在施加秸秆和氮肥处理下,CO_2排放速率在前16 d较快,而N_2O排放速率在前3 ~ 5 d较快。施加秸秆均能增加土壤有机碳和全氮含量;而施加氮肥降低了土壤有机碳含量,提高了土壤全氮含量。在不同量秸秆和氮肥的配比下,计算得出:秸秆还田产生的有机碳约有47.67%(均值)以CO_2形式排出,其中在全量秸秆和低氮量水平下最高,约为48.71%和50.72%;秸秆碳的排放系数平均值为35.2%,但不是一个常数;秸秆氮的排放系数随施氮量增加而增大,与秸秆量没有直接关系;尿素氮的排放系数均随秸秆量和氮量的增加而增大。
英文摘要	In this study,cotton soil from oasis farmland in Xinjiang was taken as a research object to assess the effects of different amounts of cotton straw and nitrogen fertilizer on soil CO_2 and N_2O emissions,soil organic carbon content,total nitrogen content and the coefficients of carbon and nitrogen emissions based on incubation experiment in laboratory. The results showed that the soil CO_2 and N_2O emissions were increased remarkably with adding straw,while the effect of nitrogen fertilizer on CO_2 emission was not significant,but the N_2O emission was increased significantly. Under adding straw and nitrogen fertilizer,the CO_2 emission was fast in the first 16 days,while the N_2O emission was rapid in the first 3 - 5 days. Soil organic carbon content and total nitrogen content were increased after applying straw. Soil organic carbon content was decreased and the total nitrogen content was increased when nitrogen fertilizer was added. The calculated results are as follows: ① The proportion of soil organic carbon from straw decomposition was 47.67%,the soil organic carbon released as CO_2, and the values were the highest (48.71% and 50.72%) under the situation of total straw and low nitrogen level; ② The mean emission factor of straw carbon was 35.2%,but it was not a constant for different treatments; ③ The emission factor of straw nitrogen was increased with the increase of applying nitrogen amount,but it was not directly related to straw quantity; ④ The emission factor of urea nitrogen was increased with the increase of applying straw and nitrogen quantities.
中文关键词	棉花秸秆 ; 土壤 ; 有机碳 ; 排放系数
英文关键词	CO_2 N_2O cotton straw soil CO_2 N_2O organic carbon emission factor
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:6119903
来源机构	中国科学院西北生态环境资源研究院 ; 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/2XILL650/236026
作者单位	1.中国科学院新疆生态与地理研究所, 绿洲生态与荒漠环境国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院西北生态环境资源研究院, 中国科学院敦煌戈壁生态与环境研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	牛百成,赵成义,俞永祥,等. 棉花秸秆和氮肥对土壤CO_2和N_2 O排放及碳氮排放系数的影响[J]. 中国科学院西北生态环境资源研究院, 中国科学院新疆生态与地理研究所,2017,34(6):1323-1330.
APA	牛百成,赵成义,俞永祥,谭立海,&安志山.(2017).棉花秸秆和氮肥对土壤CO_2和N_2 O排放及碳氮排放系数的影响.干旱区研究,34(6),1323-1330.
MLA	牛百成,et al."棉花秸秆和氮肥对土壤CO_2和N_2 O排放及碳氮排放系数的影响".干旱区研究 34.6(2017):1323-1330.