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微纳米气泡让渍水稻田“活起来”,助力农业碳中和 | ENG Agric

  • 2026-07-02 09:13:14
微纳米气泡让渍水稻田“活起来”,助力农业碳中和 | ENG Agric

1

主要内容

我国南方多雨低洼区域渍水稻田分布广泛,占当地水稻种植面积的15%-20%。长期淹水形成的强还原环境,不仅导致水稻产量较正常稻田低30%-50%,还使渍水土壤成为农业甲烷排放核心来源,与农业绿色低碳发展、碳中和战略推进形成现实矛盾。渍水土壤缺氧、亚铁离子与有机酸累积,既毒害作物根系,又固持磷、钾等关键养分,成为制约粮食安全与农田生态协同发展的突出难题。

中国科学院南京土壤研究所吴永红课题组在ENGINEERING Agriculture期刊发表题为“Multidimensional effects and mechanisms of micro-nano bubbles in regulating waterlogged soil microenvironments”的研究论文。本研究通过盆栽试验证实,氧气微纳米气泡(MNB)可通过重塑渍水土壤微孔结构、提升氧化还原电位,增加碳氮磷循环基因丰度并减少温室气体排放,实现土壤提质与生态减排双重效益,为渍水农田低成本绿色修复提供了全新技术路径。

本研究首次将MNB技术应用于渍水稻田修复,并揭示了其不同于常规改良的独特机制。研究设置了空气型微纳米气泡组(air-MNBs)与氧气型微纳米气泡组(O2-MNBs),经过40天盆栽试验,关键发现体现在三个层面:

物理重塑是起点:O2-MNB使土壤微孔数量增加2.4倍,比表面积近乎翻倍,但孔隙和喉道的协调数下降60%以上——形成大量孤立“微气囊”,实现氧气缓释而非快速散失。孔隙连通性并未显著改善。

化学转化随其后:土壤氧化还原电位从230mV升至374mV,总还原性物质降低22.4%。碱解氮升至216mg/kg,速效磷从35.6升至72.2mg/kg,速效钾升至284mg/kg。pH未发生显著变化。

生态效益是结果:甲烷排放锐减60.6%,虽二氧化碳排放翻倍,综合全球增温潜势仍下降26.2%,且氨氧化基因无变化,避免了氮素流失。路径分析证实:微孔体积占比(而非大孔隙或连通性)是驱动养分释放与生态改善的核心变量。

MNB技术为渍水土壤绿色修复提供全新范式,深度契合粮食安全保障与农业低碳转型需求。该技术以空气、氧气为原料,无化学残留、不改变土壤pH、适配现有灌溉系统,设备投入低、运维简便,可规模化应用于南方低产田改造,助力农田提质增效。同时,通过抑制甲烷排放、激活土壤碳氮磷循环,为水稻种植从“高碳”向“低碳”转型提供了可操作路径,破解传统改良“重生产、轻生态”的痛点,推动农业生产与生态保护协同发展,为绿色农业技术创新提供可复制、可推广的新路径。

2

主要图表

图1.研究内容示意图

图2.土壤的孔隙和喉道特性。(a)CK、(b)air-和(c)O2-MNBs处理中土壤孔隙和喉道的球棒模型。球代表孔隙,颜色条从蓝到红代表孔径从小到大。棍代表喉道,其厚度代表喉道直径。(d)孔隙和喉道的协调数;(e)孔隙和喉道的数量比;(f)平均喉道半径;(g)孔隙和喉道的平均直径比;(h)喉道的平均长度;(i)喉道的平均面积。

图3.土壤还原物质含量。(a)总还原物质;(b)反应性还原物质;(c)Fe2+含量;(d)反应性有机还原物质。

图4.温室气体排放通量。(a)CO2排放通量;(b)CH4排放通量;(c)N2O排放通量;以及 (d)全球增温潜势。

相关论文信息:

文章标题:Multidimensional effects and mechanisms of micro-nano bubbles in regulating waterlogged soil microenvironments

▌文章DOI:10.15302/J-FASE-2026673

▌文章链接:

https://journal.hep.com.cn/fase/EN/10.15302/J-FASE-2026673

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  1. CONNECT:[ UseTime:0.001212s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001604s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000699s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000690s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001266s ]
  6. SELECT * FROM `set` [ RunTime:0.000483s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001377s ]
  8. SELECT * FROM `article` WHERE `id` = 544839 LIMIT 1 [ RunTime:0.000984s ]
  9. UPDATE `article` SET `lasttime` = 1783438084 WHERE `id` = 544839 [ RunTime:0.022555s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000703s ]
  11. SELECT * FROM `article` WHERE `id` < 544839 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001180s ]
  12. SELECT * FROM `article` WHERE `id` > 544839 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001026s ]
  13. SELECT * FROM `article` WHERE `id` < 544839 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001649s ]
  14. SELECT * FROM `article` WHERE `id` < 544839 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.021336s ]
  15. SELECT * FROM `article` WHERE `id` < 544839 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.008816s ]
0.242916s