干旱区生态环境知识资源中心(Arid): 不同氮素水平下有机物料添加对陇中黄土高原旱作农田N

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	不同氮素水平下有机物料添加对陇中黄土高原旱作农田N_2 O排放特征的影响
其他题名	Effect of organic materials on N_2O emission under different N-fertilizer levels in dryland of the Loess Plateau of central Gansu Province
	王泳斌 1; 武均 1; 吕锦慧 1; 蔡立群 2; 张军 2; 张仁陟 2
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2019
卷号	37 期号:1 页码:108-115
中文摘要	为了探究不同用量氮肥配施生物质炭或小麦秸秆对旱作农田N_2O排放通量的影响,在陇中黄土高原半干旱区连续进行4年不同氮素水平配施不同有机物料的田间定位试验,试验以3种施氮用量(不施氮肥、50 kg( N) ·hm~(-2)氮肥、100 kg( N) ·hm~(-2)氮肥)配施2种有机物料(小麦秸秆S、生物质炭B)及无有机物料( C)共组成9个处理,于2016年11月2017年10月,采用静态箱-气相色谱法,对N_2O通量进行全年内连续观测。研究结果表明:观测期内,各处理N_2O年平均通量大小排序SN100>CN100>SN50>CN50>BN100>SNO>BN50>CN0>BN0,各处理N_2O排放通量变化趋势一致;相较N0处理( CN0、SN0、BN0)的年平均排放通量,N50( CN50、SN50、BN50)和N100( CN100、 SN100、BN100)处理分别增加了6.92%和10.03%。相较CN0、CN50和CN100,与其相同氮素水平配施生物质炭后, N_2O年平均排放通量分别降低了0.49%、3.15%和4.67%;配施秸秆后,N_2 O年平均排放通量分别增加了6.37%、 3.44%和2.73%。单施氮肥或小麦秸秆配施氮肥均增加了N_2O排放的增温潜势,生物质炭配施氮肥减少了N_2O排放的增温潜势。主效应分析表明,氮素、秸秆均对提升N_2O排放通量发挥显著效应,而生物质炭具有降低效应。相关分析表明,土壤温度与N_2O通量表现为显著正相关关系,土壤含水量与N_2O通量表现为显著负相关关系( P<5%) 。通径分析表明,土壤温度对N_2O通量的增大作用远大于土壤含水量对N_2O通量的减小作用。秸秆或生物质炭与氮素无交互效应,N_2O排放通量随氮素水平的增加而增大,秸秆还田促进了N_2O排放而生物质炭抑制了N_2O排放。因此,添加生物质炭对旱作农田固氮减排具有较大的潜力。
英文摘要	In order to explore the effect of application of biochar and straw on N_2O emission under different N -fertilizer levels in dryland of the Loess Plateau in central Gansu Province,a field trail with different organic materials combining with different N-fertilizer levels was studied for 4 years. Experiment included the following treatments: the straw combined with three N fertilizer rates ( 0,50,and 100 kg·hm~(-2) ) ,coded as SN0,SN50,and SN100,respectively; The biochar applied alone or combined with N fertilizer ( 50 and 100 kg·hm~(-2) ) ,coded as BN0,BN50,and BN100,respectively; N fertilizer ( 0,50 and 100 kg·hm~(-2) ) alone coded as CN0,CN50,and CN100,respectively. Collection of N_2O flux was conducted with a static chamber-gas chromatography method from November 2016 to October 2017. The results showed that the average N_2O flux from all treatments ranked as SN100 >CN100>SN50 >CN50 >BN100 >SNO>BN50 >CN0 >BN0,and N_2 O fluxes represented the generally same trend throughout the observed period under different treatments. Compared with N0 ( CN0,SN0,BN0) treated plots, N50 ( CN50,SN50,BN50) and N100 ( CN100,SN100,BN100) treatments increased the annual average N_2O fluxes by 6.92% and 10.03%,respectively. Compared with CN0,CN50,and CN100,the same N-fertilizer level combined with the biochar reduced the annual average N_2O fluxes by 0.49%,3.15%,and 4.67%,respectively. In comparison with CN0,CN50,and CN100 treatments,the same N-fertilizer level combined with the straw increased the annual average N_2O fluxes by 6.37%,3.44%,and 2.73%,respectively. Both N fertilizer applied alone treatments and straw combined with N fertilizer treatments boosted N_2O fluxes,biochar combined with N fertilizer treatments reduced N_2O fluxes. Both N-fertilizer and straw significantly promoted the effect of the GWP of N_2O fluxes, the biochar,however,had a reducing effect. The correlation analysis indicated that soil temperature and N_2O flux had a significant positive correlation but the soil water content and N_2O flux had a significant negative correlation ( P<5%) . The path analysis showed that the impact of soil temperature on N_2O flux was greater than soil water content. Interaction analysis exhibited that no interaction effect between straw and N,biochar and N. N_2 O flux increased with increasing N application levels. Straw application enhanced N_2O emission but biochar repressed N_2O emission. Therefore,the biochar use had a great effect on the reduction of N_2O emission in dryland.
中文关键词	旱作农田 ; N_2O 排放 ; 生物质炭 ; 秸秆还田 ; 氮素水平
英文关键词	dry farmland N_2O emission biochar straw returning N fertilizer level
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6474620
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315800
作者单位	1.甘肃农业大学资源与环境学院;;甘肃农业大学, ;;甘肃省干旱生境作物学重点实验室, 兰州;;兰州, 甘肃;;甘肃 730070;;730070, 中国; 2.甘肃农业大学资源与环境学院;;甘肃农业大学;;甘肃省节水农业工程技术研究中心, ;;甘肃省干旱生境作物学重点实验室;;甘肃省节水农业工程技术研究中心, 兰州;;兰州;;兰州, 甘肃;;甘肃;;甘肃 730070;;730070;;730070, 中国
推荐引用方式 GB/T 7714	王泳斌,武均,吕锦慧,等. 不同氮素水平下有机物料添加对陇中黄土高原旱作农田N_2 O排放特征的影响[J],2019,37(1):108-115.
APA	王泳斌,武均,吕锦慧,蔡立群,张军,&张仁陟.(2019).不同氮素水平下有机物料添加对陇中黄土高原旱作农田N_2 O排放特征的影响.干旱地区农业研究,37(1),108-115.
MLA	王泳斌,et al."不同氮素水平下有机物料添加对陇中黄土高原旱作农田N_2 O排放特征的影响".干旱地区农业研究 37.1(2019):108-115.