| 引用本文: | 南 茜,黄修桥,韩启彪,等.两种典型微灌加气装置溶解氧效果试验研究[J].灌溉排水学报,2018,37(4):59-64. |
| NAN Xi,HUANG Xiuqiao,HAN Qibiao,et al.两种典型微灌加气装置溶解氧效果试验研究[J].灌溉排水学报,2018,37(4):59-64. |
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| 两种典型微灌加气装置溶解氧效果试验研究 |
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南 茜， 黄修桥， 韩启彪， 李 浩
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中国农业科学院 农田灌溉研究所/河南省节水农业重点实验室/农业部节水灌溉工程重点实验室，河南 新乡453002；中国农业科学院 研究生院，北京100081
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| 摘要: |
| 采用加气装置通过微灌系统进行加气灌溉对作物生长、土壤环境有显著影响，适宜的加气装置有助于灌溉和生产。溶解氧是表征加气效果的重要指标之一，是加气灌溉研究关注的重要内容。【目的】 探究溶解氧在不同条件下的变化规律。【方法】 采用超微米气泡循环加气装置和空气压缩机加气装置，通过对比试验，研究了温度、通气时间等因素对2种微灌加气装置溶解氧效果的影响。【结果】 2种加气装置在不同温度、不同通气时间下溶氧量均随时间变化而缓慢衰减，超微米气泡循环加气装置呈现的衰减趋势更为明显；2种加气装置溶氧量与水温呈线性负相关关系，决定系数R2都达到了0.98以上。【结论】 采用空气压缩机加气时，不同的进气量会影响水中溶氧量的变化；加气对流量均匀性的负面作用不明显。 |
| 关键词: 微灌加气； 超微米气泡； 空气压缩机； 溶解氧； 均匀度 |
| DOI：10.13522/j.cnki.ggps.2017.0554 |
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| Experimental Study on Oxygen Dissolution in Two Micro-devices for Aerated Irrigation |
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NAN Xi ， HUANG Xiuqiao， HAN Qibiao， LI Hao
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Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Water Saving Agriculture of Henan Province/ Key Laboratory of Water Saving Irrigation Project of Ministry of Agriculture, Xinxiang 453002, China; Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
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| Abstract: |
| 【Objective】 Aerated irrigation affects crop growth and soil environment and oxygen dissolution is an indicator to assess the efficacy of the aerated irrigation technologies. The purpose of this paper is to examine oxygen dissolution in two micro-devices used for aerated irrigation. 【Method】 Experiments were conducted to compare the efficacy of the ultra-micron bubble cyclic aeration device and the air compressor aeration device in dissolving oxygen under different temperature and aeration time. 【Result】 The rate of oxygen dissolution in the two aeration devices decreased with time under different temperatures and aeration durations, especially in the ultra-micron bubble cyclic aeration device. The dissolved oxygen was negatively related to water temperature with the coefficient of determination higher than 0.98. 【Conclusion】 For the air compressor, the dissolved oxygen depended on the air-intake volume, while the air taken into the device for aeration had negligible impact on the uniformity of the efflux rate. |
| Key words: aerated micro-irrigation; ultra-micron bubble; air compressor; dissolved oxygen; uniformity |
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