Spatial variation of nitrous oxide emission between interrow soil and interrow plus row soil in a long-term maize cultivated sandy loam soil
Spatial variation of nitrous oxide emission between interrow soil and interrow plus row soil in a long-term maize cultivated sandy loam soil
复制标题
长期种植玉米的砂壤土行间土和行间加行土氧化亚氮排放空间变化
DOI：
10.1016/j.geoderma.2012.03.005
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发表时间：
2012-07
期刊：
影响因子：
6.1
通讯作者：
Luo, Jiafa
中科院分区：
文献类型：
--
作者：
Cai, Yanjiang;Ding, Weixin;Luo, Jiafa
农田N2 O排放具有很大的空间变异性，秸秆作物种植农田的N2 O排放一般在行间区域进行测量。以华北平原桑迪壤土为研究对象，研究了玉米行间土壤和行间+行间土壤N2 O排放的季节性差异，以及不同肥料对玉米行间土壤N2 O排放的影响。试验设有机肥（OM）、半有机肥N+半化肥N（HOM）、化肥NPK（NPK）、化肥NK（NK）和对照（CK）5个处理。玉米生长季行间+行间土壤N2 O累积排放量为0.84-1.22kgNha-1，施氮处理平均为0.98kgNha-1，显著高于行间土壤的0.30-0.49kgNha-1。而CK处理则无显著差异。行间土壤的测量低估了44- 67%的N2 O排放量。这种差异主要发生在施肥后的两个排放高峰期，可能是由于土壤反硝化潜力的差异。施用有机肥比施用无机氮肥更有效地增加了行间和行间+行间土壤N2 O排放的差异。较高的NO3−浓度并未导致NK处理行间土壤N2 O排放量高于NPK处理，但却导致行间+行间土壤N2 O排放量高于NPK处理，导致行间土壤和行间+行间土壤N2 O排放量差异较大。因此，在华北平原玉米种植土壤中，仅测定行间土壤N2 O排放量可能会低估N2 O的季节排放量，并部分掩盖氮肥施用量对N2 O排放的影响。
There is a high spatial variation in N2O emission from agricultural fields and N2O emissions from fields cultivated with stalk-crops was generally measured in the interrow area. The aim of this study was to evaluate the difference in seasonal N2O emissions between interrow soil and interrow+row soil, and to understand the effect of different fertilizers on N2O emissions in a maize-cultivated sandy loam soil in the North China Plain. The experiment included five treatments: organic manure (OM), half-organic manure N plus half fertilizer N (HOM), fertilizer NPK (NPK), fertilizer NK (NK) and control (CK). Cumulative N2O emission from interrow+row soil during the maize growth season was 0.84–1.22kgNha−1with an average of 0.98kgNha−1in the N-fertilized treatments, significantly higher than the 0.30–0.49kgNha−1from interrow soil. However, no significant difference was observed in the CK treatment. The measurement in interrow soil underestimated N2O emissions by 44–67%. This difference mainly occurred at the two peak emission periods following fertilizer application probably due to discrepancy in soil denitrification potential. Manure application more efficiently increased difference in N2O emission between interrow soil and interrow+row soil than inorganic N fertilizer application. The higher NO3−concentration did not induce larger N2O emission from interrow soil in the NK treatment than in the NPK treatment, but did from interrow+row soil, resulting in greater difference in N2O emission between interrow soil and interrow+row soil. It is suggested that measuring N2O emission solely from interrow soil could underestimate seasonal N2O emissions, and partly mask the effect of N fertilizer application rates on N2O emission in a maize-cultivated soil in the North China Plain.
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影响因子：
6.5
作者：
Shutao Chen;Yao Huang;Jianwen Zou
通讯作者：
Shutao Chen;Yao Huang;Jianwen Zou
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
影响因子：
4.9
作者：
J. V. van Groenigen;G. Kasper;G. Velthof;A. van den Pol-van Dasselaar-A.-van-den-Pol-van-Dasselaar-1437517796;P. Kuikman
通讯作者：
J. V. van Groenigen;G. Kasper;G. Velthof;A. van den Pol-van Dasselaar-A.-van-den-Pol-van-Dasselaar-1437517796;P. Kuikman
影响因子：
3.1
作者：
G. Xing
通讯作者：
G. Xing
影响因子：
--
作者：
Steve Millam
通讯作者：
Steve Millam