Nitrous oxide emissions from a rainfed-cultivated black soil in Northeast China: effect of fertilization and maize crop
Nitrous oxide emissions from a rainfed-cultivated black soil in Northeast China: effect of fertilization and maize crop
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中国东北雨养黑土的一氧化二氮排放：施肥和玉米作物的影响
DOI：
10.1007/s00374-012-0709-y
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发表时间：
2012-06
影响因子：
6.5
通讯作者：
Zhou, Baoku
中科院分区：
文献类型：
--
作者：
Ni, Kang;Ding, Weixin;Zaman, M.;Cai, Zucong;Wang, Yufeng;Zhang, Xilin;Zhou, Baoku
在不同的农业景观中，尤其是在耕地上，施用化肥产生的一氧化二氮排放量（N2 O）在空间和时间上都是非常多变的，因此对研究人员、建模人员和政策制定者来说，准确预测N2 O排放量是最大的挑战。在中国黑龙江省哈尔滨市农业生态重点试验站，对一种种植玉米的黑土（乌迪克软土）的氧化亚氮排放进行了监测。这四个处理是：不施N（C 0）或施225 kg N ha−1（CN）的裸土和玉米（Zea maysL.）-种植的土壤不施N（P0）或施225 kg N ha−1（PN）。在未种植的土壤中，氧化亚氮排放量从141 ± 5 g N2 O-N ha−1（C 0）显著增加到570 ± 33 g N2 O-N ha−1（CN），在种植的土壤中，氧化亚氮排放量从209 ± 29 g N2 O-N ha−1（P0）增加到884 ± 45 g N2 O-N ha−1（PN）。约75%的N_2O排放来自施用的肥料N，施用的肥料N作为N_2O的排放因子（EF）在未种植和种植土壤中分别为0.19和0.30%。施氮土壤中玉米的存在显著（P< 0.05）增加了55%的N2 O排放量，而未施氮土壤中的N2 O排放量没有增加。施肥×玉米对N2 O排放的互作效应显著（P< 0.05）。N2 O通量受土壤湿度和土壤温度的影响显著（P< 0.05），温度敏感度为1.73-2.24，两者共同解释了N2 O通量季节变化的62- 76%。研究结果表明，东北黑土农田N2 O排放主要取决于氮肥的施用，但由于降水量和土壤水分的不足，氮肥转化为N2 O的效率较低。
Nitrous oxide emission (N2O) from applied fertilizer across the different agricultural landscapes especially those of rainfed area is extremely variable (both spatially and temporally), thus posing the greatest challenge to researchers, modelers, and policy makers to accurately predict N2O emissions. Nitrous oxide emissions from a rainfed, maize-planted, black soil (Udic Mollisols) were monitored in the Harbin State Key Agroecological Experimental Station (Harbin, Heilongjiang Province, China). The four treatments were: a bare soil amended with no N (C0) or with 225 kg N ha−1(CN), and maize (Zea maysL.)-planted soils fertilized with no N (P0) or with 225 kg N ha−1(PN). Nitrous oxide emissions significantly (P< 0.05) increased from 141 ± 5 g N2O-N ha−1(C0) to 570 ± 33 g N2O-N ha−1(CN) in unplanted soil, and from 209 ± 29 g N2O-N ha−1(P0) to 884 ± 45 g N2O-N ha−1(PN) in planted soil. Approximately 75 % of N2O emissions were from fertilizer N applied and the emission factor (EF) of applied fertilizer N as N2O in unplanted and planted soils was 0.19 and 0.30 %, respectively. The presence of maize crop significantly (P< 0.05) increased the N2O emission by 55 % in the N-fertilized soil but not in the N-unfertilized soil. There was a significant (P< 0.05) interaction effect of fertilization × maize on N2O emissions. Nitrous oxide fluxes were significantly affected by soil moisture and soil temperature (P< 0.05), with the temperature sensitivity of 1.73–2.24, which together explained 62–76 % of seasonal variation in N2O fluxes. Our results demonstrated that N2O emissions from rainfed arable black soils in Northeast China primarily depended on the application of fertilizer N; however, the EF of fertilizer N as N2O was low, probably due to low precipitation and soil moisture.
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影响因子：
2.4
作者：
EICHNER, MJ
通讯作者：
EICHNER, MJ
DOI：
10.5860/choice.31-3799
发表时间：
2013-01
期刊：
--
影响因子：
--
作者：
S. Pal
通讯作者：
S. Pal
DOI：
--
发表时间：
2006
期刊：
--
影响因子：
--
作者：
S. Eggleston;L. Buendia;K. Miwa;T. Ngara;K. Tanabe;K. Paustian;A. V. Amstel;Manure Management
通讯作者：
S. Eggleston;L. Buendia;K. Miwa;T. Ngara;K. Tanabe;K. Paustian;A. V. Amstel;Manure Management
影响因子：
3.1
作者：
G. Xing
通讯作者：
G. Xing
影响因子：
11.6
作者：
Smith, KA
通讯作者：
Smith, KA