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首页> 外文期刊>The Science of the Total Environment >Microalgae-derived hydrochar application on rice paddy soil: Higher rice yield but increased gaseous nitrogen loss
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Microalgae-derived hydrochar application on rice paddy soil: Higher rice yield but increased gaseous nitrogen loss

机译：在稻田土壤上施用微藻衍生的碳氢化合物：水稻产量更高，但气态氮损失增加

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摘要

Hydrothermal carbonization represents a promising technique for transforming microalgae into the hydrochar with abundant phytoavailable nutrients. However, the effects of microalgae-derived hydrochars on the gaseous nitrogen (N) loss from agricultural field are still unclear. Chlorella vulgaris powder (CVP) and two Chlorella vu/garis-derived hydrochars that employ water (CVHW) or citrate acid solution (CVHCA) as the reaction medium were applied to a soil column system grown with rice. The temporal variations of nitrous oxide (N_2O) emissions and ammonia (NH_3) volatilization were monitored during the whole rice-growing season. Results showed that CVHW and CVHCA addition significantly increased the grain yield (by 13.5-26.8% and 10.5-23.4%) compared with control and CVP group, while concomitantly increasing the ammonia volatilization (by 53.8% and 72.9%) as well as N_2O emissions (by 2.17- and 2.82-fold) from paddy soil compared to control. The microbial functional genes (AOA.AOB, nirk, nirS, nosZ) in soil indicated that CVHW and CVHCA treatment stimulated the nitrification and denitrification, and inhibited the N_2O oxidation in soil. Notably, CVHW was recommended in the view of improving yield and controlling NH_3 volatilization because no significant difference of the yield-scale NH_3 volatilization was detected between control and CVHW treatment. This study for the first time uncovered that Chlorella vulgaris-derived hydrochars have positive effects on rice N utilization and growth but negative effects on the atmospheric environment.
机译：水热碳化是一种将微藻转化为具有丰富植物有效养分的水炭的有前途的技术。然而，微藻衍生的碳氢化合物对农田气态氮（N）损失的影响仍不清楚。将小球藻粉（CVP）和两种以水（CVHW）或柠檬酸溶液（CVHCA）为反应介质的小球藻/加里斯衍生的碳氢化合物应用于水稻种植的土壤柱系统。在整个水稻生长期监测一氧化二氮（N_2O）排放和氨（NH_3）挥发的时间变化。结果表明，与对照组和CVP组相比，添加CVHW和CVHCA显着提高了谷物产量（分别提高了13.5-26.8％和10.5-23.4％），同时增加了氨挥发（分别提高了53.8％和72.9％）和N_2O排放量与对照相比（分别是稻田土壤的2.17倍和2.82倍）。土壤中的微生物功能基因（AOA.AOB，nirk，nirS，nosZ）表明，CVHW和CVHCA处理刺激了硝化和反硝化作用，并抑制了N_2O的氧化。值得注意的是，从提高产量和控制NH_3挥发的角度考虑，推荐使用CVHW，因为在对照和CVHW处理之间未发现产量规模NH_3挥发的显着差异。这项研究首次发现小球藻来源的水炭对水稻氮素的利用和生长具有积极影响，但对大气环境却具有负面影响。

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  • 来源
    《The Science of the Total Environment》 |2020年第may15期|137127.1-137127.9|共9页
  • 作者

    Qingnan Chu; Lihong Xue; Yueqin Cheng; Yang Liu; Yanfang Feng; Shan Yu; Lin Meng; Gang Pan; Pengfu Hou; Jingjing Duan; Linzhang Yang;

  • 作者单位

    Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences. Nanjing 210014 China Centre of Integrative Water-Energy-Food Studies School of Animal Rural and Environmental Sciences Nottingham Trent University Brackenhurst Campus Nottinghamshire NG25 OQF UK;

    Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences. Nanjing 210014 China School of the Environment and Safety Engineering jiangsu University Zhenjiang 212001 China;

    Nanjing Station of Quality Protection in Cultivated Land Nanjing 210036 China;

    Research Center ofioT Agriculture Applications/Institute of Agricultural Information jiangsu Academy of Agricultural Sciences Nanjing 210014 China;

    Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences. Nanjing 210014 China School of the Environment and Safety Engineering jiangsu University Zhenjiang 212001 China Stockbridge School of Agriculture University of Massachusetts Amherst MA 01003 USA;

    Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences. Nanjing 210014 China;

    Key Laboratory of Tobacco Biology and Processing Ministry of Agriculture and Rural Affairs Tobacco Research Institute of Chinese Academy of Agricultural Sciences Qingdao 266101 China;

    Centre of Integrative Water-Energy-Food Studies School of Animal Rural and Environmental Sciences Nottingham Trent University Brackenhurst Campus Nottinghamshire NG25 OQF UK;

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  • 正文语种 eng
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  • 关键词

    Ammonia volatilization; Chlorella vulgaris; Hydrothermal carbonization; Nitrogen use efficiency; Nitrous oxide emission; Non-point pollution;

    机译：氨挥发小球藻;热液碳化;氮利用效率;一氧化二氮排放;面源污染;

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