干旱区生态环境知识资源中心(Arid): 施氮对黄土旱塬区春玉米土壤呼吸和温度敏感性的影响

Arid

	施氮对黄土旱塬区春玉米土壤呼吸和温度敏感性的影响
其他题名	Effects of Nitrogen Fertilization on Soil Respiration and Temperature Sensitivity in Spring Maize Field in Semi-Arid Regions on Loess Plateau
	姜继韶 1; 郭胜利 1; 王蕊 2; 刘庆芳 2; 王志齐 3; 张彦军 3; 李娜娜 3; 李如剑 3; 吴得峰 2; 孙棋棋 1
来源期刊	环境科学
ISSN	0250-3301
出版年	2015
卷号	36 期号:5 页码:1802-1809
中文摘要	了解施氮对土壤呼吸和温度敏感性的影响,是研究农田土壤呼吸变化的重要环节,对预测农田土壤呼吸变化具有重要意义.基于中国科学院长武黄土高原农业生态试验站的氮肥管理试验,于2013年4月至2014年9月利用LI-8100系统(LI-COR, Lincoln, NE, USA)监测施氮和不施氮条件下旱地春玉米生长季土壤呼吸、温度、水分以及根系生物量的变化,研究施氮条件下生物与非生物因素对土壤呼吸速率和温度敏感性(Q_(10))的影响.施氮显著提高了生长季土壤的累积呼吸量(P<0.05),与不施氮相比,施氮处理累积呼吸量2013年提高了35%,2014年提高了54%.但施氮显著降低了土壤呼吸温度敏感性(P<0.05),施氮处理的Q_(10)较对照2013年降低了27%,2014年降低了17%.施氮显著提高了春玉米产量、地上部生物量和根系生物量(P<0.05).施氮处理根系生物量较不施氮处理2013年提高了0.32倍,2014年提高了1.23倍.施氮对土壤温度和水分无显著影响,根系生物量是施氮条件下导致土壤呼吸差异的重要生物因素.
英文摘要	Understanding the effects of nitrogen fertilization on soil respiration rate and its temperature sensitivity (Q_(10)) is of critical importance to predict the variability of soil respiration in cropland. A field experiment was established in a rain-fed spring maize cropland (Zea mays L.) in the State Key Agro-Ecological Experimental Station in the Loess Plateau in Changwu County, Shaanxi Province, China. The experiment comprised of two treatments: no N-fertilizer application (CK) and N-fertilizer application with 160 kg N·hm~(-2) (N). Soil respiration rate, soil temperature, soil moisture, yields, aboveground biomass and root biomass were measured in two continuous spring maize growing seasons from April 2013 to September 2014. The cumulative soil CO_2 emissions were increased by 35% in 2013 and 54% in 2014 in N treatment as compared to CK treatment. Though nitrogen fertilization significantly increased the cumulative soil CO_2 emissions (P<0.05), it did decrease evidently the temperature sensitivity of soil respiration (P<0.05). The Q_(10) values in N treatment were decreased by 27% and 17% compared with CK treatment in 2013 and 2014, respectively. Nitrogen fertilization significantly increased the maize yields, aboveground biomass and root biomass (P<0.05). Root biomasses in N treatment were 32% and 123% greater than those in CK treatment of 2013 and 2014, respectively. Nitrogen fertilization had no marked influence on soil temperature or moisture. Root biomass was a critical biotical factor for variation of soil respiration under nitrogen fertilization.
中文关键词	施氮 ; 春玉米 ; 土壤呼吸 ; 根系生物量 ; 黄土高原
英文关键词	Q_(10) nitrogen fertilization spring maize soil respiration Q_(10) root biomass Loess Plateau
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:5431964
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/2XILL650/232908
作者单位	1.中国科学院水利部水土保持研究所, 杨凌, 712100; 2.西北农林科技大学资源环境学院, 杨凌, 712100; 3.西北农林科技大学水土保持研究所, 杨凌, 712100
推荐引用方式 GB/T 7714	姜继韶,郭胜利,王蕊,等. 施氮对黄土旱塬区春玉米土壤呼吸和温度敏感性的影响[J]. 西北农林科技大学,2015,36(5):1802-1809.
APA	姜继韶.,郭胜利.,王蕊.,刘庆芳.,王志齐.,...&孙棋棋.(2015).施氮对黄土旱塬区春玉米土壤呼吸和温度敏感性的影响.环境科学,36(5),1802-1809.
MLA	姜继韶,et al."施氮对黄土旱塬区春玉米土壤呼吸和温度敏感性的影响".环境科学 36.5(2015):1802-1809.