干旱区生态环境知识资源中心(Arid): 施氮水平对黄土旱塬区麦田土壤呼吸变化的影响

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	施氮水平对黄土旱塬区麦田土壤呼吸变化的影响
其他题名	Effects of Nitrogen Rates on Soil Respiration in Winter Wheat Cropping System in Semi-Arid Regions on Loess Plateau
	高会议 1; 郭胜利 2; 刘文兆 2; 车升国 2
来源期刊	环境科学
ISSN	0250-3301
出版年	2010
卷号	31 期号:2 页码:390-396
中文摘要	为评价土壤呼吸对施氮的响应,于2008年3月~2009年3月,监测了黄土旱塬区长期不同施氮水平条件下小麦连作系统中土壤呼吸日变化、季节变化以及不同生育期土壤可溶性碳(dissolved organic C, DOC)、微生物量碳(soilmicrobial biomass C, MBC)、土壤有机碳(soil organic C, SOC)和土壤全氮(soil totalN, STN)的含量变化.研究涉及5个施氮水平(以N计) 0(N_0)、45(N_(45))、90(N_(90))、135(N_(135))和180(N_(180)) kg/hm~2.结果表明,施氮量为0~90 kg/hm~2时,土壤呼吸速率随施氮量的增加而显著升高; 90~135 kg/hm~2时,土壤呼吸速率随施氮量的增加略有增加; 135~180 kg/hm~2时,随着施氮量的增加土壤呼吸呈降低趋势.在一年监测期间, N_0、N_(45)、N_(90)、N_(135)、N_(180)波动范围(以CO_2计)分别为0.27~2.01、0.36~2.26、0.58~2.56、0.65 ~2.94和0.58~2.6mumol/(m~2.s).在季节变化尺度上,土壤呼吸具有显著的活跃期(3~10月)和微弱期(11月~次年2月).施氮显著影响DOC、MBC含量变化.土壤呼吸速率与DOC、MBC呈显著正相关,而与土壤碳氮比(C/N)呈显著负相关关系
英文摘要	To evaluate effects of nitrogen rates on soil respiration, we measured the diurnal and seasonal dynamic changes and the contents of the soil organic carbon (SOC), soil dissolved organic carbon (DOC), soil microbial biomass carbon (MBC), and total soil nitrogen (TSN) under different growing seasons of winter wheat under the continuous systems from March in 2008 to March in 2009 at Changwu ecological station of the Chinese Academy of Sciences. The experiment consists of five nitrogen rates: 0 ( N ), 45 (N4 ), 90 (N_(90)), 135 (N_(135)), and 180 (N_(180)) kg/hm~2. Soil respiration rate significantly enhanced with increasing nitrogen rate ranging from 0 to90 kg/hm~2 and increased little from 90 to 135 kg/hm~2, but decreased with increasing nitrogen rate from 135 to 180 kg/hm~2. At the seasonal change scale, there were an active phase of soil respiration from March to October and a weak phase of soil respiration from November to February. At the annual change scale, the fluctuate range of the treatments N_0, N_(45), N_(90), N_(135), and N_(180) were 0. 27-2. 01 mumol/(m~2. s), 0.36-2.26 mumol/(m~2. s) 0.58-2.56 mumol/(m~2. s), 0.65-2.94 mumol/( m~2. s), and 0.58-2.6 mumol/(m~2. s), respectively. Nitrogen fertilization significantly affected the dynamic changes of DOC and MBC. There were significant positive correlations between soil respiration rate and DOC and MBC, while significant negative correlations with the C/N ratio
中文关键词	施氮水平 ; 土壤呼吸速率 ; 土壤可溶性碳 ; 微生物量碳 ; 土壤碳氮比
英文关键词	nitrogen rates soil respiration rate soil dissolved organic carbon (DOC) soil microbial biomass carbon (MBC) C/N ratio
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:3933871
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225313
作者单位	1.中国科学院合肥智能机械研究所, 合肥, 安徽 230031, 中国; 2.西北农林科技大学资源环境学院, 杨凌, 712100
推荐引用方式 GB/T 7714	高会议,郭胜利,刘文兆,等. 施氮水平对黄土旱塬区麦田土壤呼吸变化的影响[J]. 西北农林科技大学,2010,31(2):390-396.
APA	高会议,郭胜利,刘文兆,&车升国.(2010).施氮水平对黄土旱塬区麦田土壤呼吸变化的影响.环境科学,31(2),390-396.
MLA	高会议,et al."施氮水平对黄土旱塬区麦田土壤呼吸变化的影响".环境科学 31.2(2010):390-396.