| Cite this article: | 熊浩,张保成,李建柱,等.灌溉水量对冬小麦农田土壤N2O与CO2排放的影响[J].灌溉排水学报,0,():-. |
| XIONG Hao,ZHANG Bao-cheng,LI Jian-zhu,et al.灌溉水量对冬小麦农田土壤N2O与CO2排放的影响[J].灌溉排水学报,0,():-. |
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| Effects of Different Irrigation Schemes on Soil N2O and CO2 Emission in Winter Wheat Fields |
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XIONG Hao1, ZHANG Bao-cheng2, LI Jian-zhu1, ZHANG Xu2, SHI Jian-hua2
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1.Tianjin University School of Civil Engineering;2.Beijing Sino-Water Keyuan Engineering Consulting Co,Ltd
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| Abstract: |
| Abstract:【Objective】Studying the emission characteristics and the main driving factors of N2O and CO2 in winter wheat field under different irrigation schemes could provide theoretical basis for rational agricultural irrigation and emission reduction of greenhouse gases.【Method】Maize-wheat rotation fields in Jinzhou city, Hebei Province were selected as the experiment spots to do such a research. There are six irrigation schemes including CK (89.96 mm), T1(80.96 mm), T2(71.97 mm), T3(62.97 mm), T4(53.98 mm) and T5(44.98 mm). The emission fluxes of N2O and CO2 in soil were collected and analyzed by Static chamber-gas chromatography.【Result】（1）The experimental results showed that the decrease of irrigation water reduced the soil N2O and CO2 emission flux. Compared with CK, the cumulative emission of soil N2O from T1 to T5 decreased 24.99% (P=0.18), 10.89% (P=0.53), 39.14% (P=0.06), 48.99% (P < 0.05) and 56.11% (P < 0.05), respectively. The cumulative emission of soil CO2 decreased by 5.47%, 4.75%, 9.65%, 7.52% and 12.33%, respectively, but none of them reached significant levels (P>0.05).（2）Correlation analysis showed that N2O emission flux was positively correlated with soil moisture of 0~10cm, 10~20cm depth and soil temperature of 0~5cm depth, CO2 emission flux was positively correlated with soil moisture of 0~10cm depth and soil temperature of 0~5cm depth, and negatively correlated with soil moisture of 10~20cm depth. This study shows that the emission of N2O and CO2 from wheat field is influenced by soil moisture and soil temperature to some extent.（3）Compared with CK, the comprehensive greenhouse effect of soil N2O and CO2 emissions decreased by 5.73%~19.30% in T1~T5 treatment, and the yield of wheat was highest in T3 treatment.【Conclusion】The irrigation amount corresponding to T3 is the recommended irrigation amount that takes into account water saving, crop yield and atmospheric environment. |
| Key words: irrigation amount; winter wheat; soil N2O emission; soil CO2 emission |
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