干旱区生态环境知识资源中心(Arid): 施氮和土壤水热条件对休耕季农田土壤N

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	施氮和土壤水热条件对休耕季农田土壤N_2O排放的影响
其他题名	Effects of Nitrogen Application and Soil Hydrothermal Conditions on N_2O Emission from Farmland during Fallow Season
	刘姝彤; 马忠明; 王智琦; 赵凡; 金军民
来源期刊	灌溉排水学报
ISSN	1672-3317
出版年	2020
卷号	39 期号:7 页码:60-67
中文摘要	【目的】研究施氮和土壤水热条件对河西绿洲灌区休耕季小麦玉米间作农田土壤N_2O排放的影响。【方法】依托河西绿洲灌区地下淋溶长期定位监测试验,设置CK(不施肥)、CONV(常规施肥)、OPT(优化施肥)、OPT-N (减量施氮)和OPT+N(增量施氮)5个处理,采用静态箱-气相色谱法在休耕季监测小麦玉米间作农田土壤N_2O通量动态变化,并建立二次多项式逐步回归方程,绘制交互效应曲面图。【结果】整个休耕季,小麦玉米间作农田是土壤N_2O排放的弱源,土壤反硝化过程起主要作用。2018年11月中旬2019年2月中旬,N_2O通量总体表现为吸收,CONV处理和OPT+N处理虽有较高的N_2O排放,但是处理间N_2O通量排放差异未达显著水平(P>0.05)。在冬灌后,CONV、OPT、OPT-N、OPT+N处理N_2O排放呈增长趋势,CK的N_2O通量表现为吸收。通过交互效应曲面图发现10 cm地温与土壤N_2O排放关联度最大,以及在交互作用的影响下,休耕季10 cm土壤地温与土壤N_2O排放呈相反趋势。【结论】休耕季小麦玉米间作农田土壤N_2O排放受生长季施肥影响较小,受土壤水热条件的影响较大。
英文摘要	【Objective】The objective of this paper is to study the effects of fertilization and soil hydrothermal conditions on N_2O emission from wheat-maize intercropping farmland.【Method】Based on the long-term monitoring experiment of underground leaching in Hexi oasis irrigation area, five treatments, CK (no fertilization), CONV(conventional fertilization), OPT (optimized fertilization), OPT-N (reduced nitrogen application) and OPT+N (incremental nitrogen application) were selected, and static chamber-gas chromatography was adopted to monitor the soil N_2O flux dynamics in wheat maize intercropping farmland during the fallow season, and we established the quadratic polynomial progressive regression equation and drew the interactive effect surface diagram.【Result】The results showed that wheat-maize intercropping fields were the weak source of soil N_2O emission during the whole fallow season, and the denitrification process played an important role. From the mid- November 2018 to the mid-February 2019, the overall N_2O flux is manifested as absorption. Although the treatment of CONV and OPT+N had higher N_2O emissions, the differences of N_2O flux emissions among the treatments were not significant (P>0.05). After winter irrigation, the N_2O emissions treated by CONV, OPT, OPT-N and OPT+N showed an increasing trend, while the N_2O flux treated by CK showed as absorption. After winter irrigation, N_2O emissions of CONV, OPT, OPT-N and OPT+N treatments showed an increasing trend, and N_2O flux of CK treatment showed absorption. It was found that the correlation between soil temperature of 10 cm and soil N_2O emission was the highest, and under the influence of the interaction, the soil temperature of 10 cm in fallow season showed an opposite trend with soil N_2O emission. 【Conclusion】The N_2O emission of wheat-maize intercropping farmland in fallow season is less affected by fertilization in growing season and more affected by soil hydrothermal conditions.
中文关键词	施氮 ; 土壤 ; 灌区 ; 休耕季 ; 小麦玉米间作
英文关键词	N_2O nitrogen application soil Hexi oasis irrigation Area fallow season wheat-maize intercropping N_2O
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6774542
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336746
作者单位	刘姝彤, 甘肃农业大学农学院;;甘肃省榆中县农业技术推广中心, 甘肃省干旱生境作物学重点实验室;;, 兰州;;榆中, ;;甘肃 730070;;730100.; 马忠明, 甘肃农业大学农学院;;甘肃省农业科学院, 甘肃省干旱生境作物学重点实验室;;, 兰州;;兰州, ;; 730070;;730070.; 王智琦, 甘肃省农业科学院土壤肥料与节水农业研究所, 兰州, 甘肃 730070, 中国.; 赵凡, 甘肃省榆中县农业技术推广中心, 榆中, 甘肃 730100, 中国.; 金军民, 甘肃省科学院生物研究所, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	刘姝彤,马忠明,王智琦,等. 施氮和土壤水热条件对休耕季农田土壤N_2O排放的影响[J]. 甘肃农业大学,2020,39(7):60-67.
APA	刘姝彤,马忠明,王智琦,赵凡,&金军民.(2020).施氮和土壤水热条件对休耕季农田土壤N_2O排放的影响.灌溉排水学报,39(7),60-67.
MLA	刘姝彤,et al."施氮和土壤水热条件对休耕季农田土壤N_2O排放的影响".灌溉排水学报 39.7(2020):60-67.