再生水滴灌夏玉米配施不同氮肥对CO2和N2O排放的影响
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国家自然科学基金资助项目(51279204)


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    摘要:

    夏玉米种植期间,设置淡水和再生水2种滴灌灌水水质,无肥、尿素、硫酸铵和缓释肥4种施肥处理。研究不同水质、不同氮肥对农田土壤CO2、N2O排放和夏玉米产量的影响。结果表明:与淡水灌溉相比,再生水灌溉土壤CO2日平均排放通量平均降低12.44%,N2O日平均排放通量平均增加17.31%,但灌水水质对CO2、N2O日平均排放通量没有显著影响(p>0.05);与不施肥处理相比,尿素、硫酸铵和缓释肥处理CO2日平均排放通量分别平均增加18.67%、10.20%和2.76%,N2O日平均排放通量分别平均增加117.73%、220.21%和108.70%,施肥种类对CO2日平均排放通量没有显著性影响(p>0.05),但对N2O日平均排放通量影响显著(p<0.05);与国家夏玉米生产试验产量相比,各施肥处理产量平均增加19.83%,而不施肥处理平均降低0.83%,但不同水质、施肥处理对产量没有显著影响(p>0.05)。

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    During the growth period of summer maize, fresh water (F) and reclaimed water (R) are both used for drip irrigation with no fertilizer (CK), urea (U), ammonium sulfate (A) and slow-release urea (S). From the result of experiment, we can realize the impact of different water quality and different nitrogen fertilizers on CO2 and N2O emissions from the soil and the yield of summer maize. The result showed that the average daily emissions of CO2 flux from the soil irrigated by reclaimed water is reduced by an average of 12.44%, and the average daily emissions of N2O flux from the same soil was increased by an average of 17.31% compared with the soil irrigated by fresh water, From these data, we can know that the impact of irrigation water quality on the average daily emissions of CO2 and N2O is not significant (p>0.05). Compared with no fertilizer treatment, the average daily emissions of CO2 flux from the soil fertilized by urea, ammonium sulfate and slow-release fertilizer were respectively increased by an average of 18.67%, 10.20% and 2.76%, and the average daily emissions of N2O flux from the same soil were respectively increased by an average of 117.73%,220.21% and 108.70%. From these data, we can know that fertilizer types had an insignificant impact on the average daily emissions of CO2 flux, but it had an significant impact on the average daily emissions of N2O flux (p>0.05). Compared with the national yield of summer maize production, the yield of summer maize was increased by an average of 19.83% from the fertilized soil, and reduced by an average of 0.83% from the unfertilized soil. From these data, we can realize that the impact of different water qualities and fertilizers on summer maize yield was not significant (p>0.05). Under the premise of saving water and ensuring production, the research result plays a very important role in the study of different water qualities and fertilizers to reduce the emissions of CO2 and N2O.

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高大伟,任树梅,杨培岭,商放泽,马 宁,石建国.再生水滴灌夏玉米配施不同氮肥对CO2和N2O排放的影响[J].农业机械学报,2014,45(S1):168-174.

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  • 收稿日期:2014-06-29
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  • 在线发布日期: 2014-11-15
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