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Electrical stimulation of Cucumis sativus germination and growth using IrO2-Ta2O5|Ti anodes in Vertisol pelic
Applied Soil Ecology ( IF 4.8 ) Pub Date : 2021-01-05 , DOI: 10.1016/j.apsoil.2020.103864
C. Morales , S. Solís , F.J. Bacame , M.Y. Reyes-Vidal , J. Manríquez , E. Bustos

The effect of the application of electric fields, magnetic fields, and electric currents in plants is still limited. Some research has yielded favorable results on plant growth, but some has found inhibition of plant development. The physiological, microbiological, and edaphological characteristics of plants could be affected by imposing low-intensity electric fields using a 2D array of electrodes with six modified anodes with transition metal oxides such as IrO2-Ta2O5|Ti anodes around a naked Ti cathode. In the case of cucumber (Cucumis sativus) germination, electrofarming showed a higher percentage of germination (50%) than did conventional farming (30%), and changes in the other physiological properties of cucumber plants were also observed. The results showed that after 4 h of exposure to an electric field (0.2 V cm−1), stem thickness (6%), cotyledon length (5%), true leaf size (49%) and generated biomass (53%) were quantitatively improved; properties such as stem elongation (20%) and root length were quantitatively improved, and significantly different effects were obtained after exposure to the electric field (p < 0.05) than without it.

In the case of microbiological characterization, after exposure to the electric field, a greater number of CFUs were obtained for bacteria and fungi, with an increase of 2× in both cases, than in the control soil. The electric field significantly increased the CFUs in the area close to the anodes compared to CFUs in the control soil. Other properties were also improved by electrofarming; in the microscopic characterization of bacteria, a higher percentage of Gram (−) bacilli was obtained along with increased percentages of soil organic matter (42%), cationic exchange capacity (6%), and enzymatic activity (47%) close to the anodes compared to results in the control soil.



中文翻译:

IrO 2 -Ta 2 O 5 | Ti阳极在Vertisol鹈鹕中电刺激黄瓜黄瓜的萌发和生长

在植物中施加电场,磁场和电流的效果仍然有限。一些研究对植物生长产生了有利的结果,但是一些研究发现对植物发育的抑制。可以通过使用二维电极阵列施加低强度电场来影响植物的生理,微生物和水文特性,该二维阵列的电极带有六个修饰的阳极,并带有过渡金属氧化物,例如IrO 2 -Ta 2 O 5 | Ti裸露的阳极阴极。如果是黄瓜(黄瓜))的发芽率,电耕显示的发芽率(50%)比常规耕作的发芽率(30%)高,并且还观察到黄瓜植株的其他生理特性发生变化。结果表明,暴露于电场(0.2 V cm -1)4 h后,茎粗(6%),子叶长度(5%),真叶大小(49%)和产生的生物量(53%)为定量改进;茎伸长率(20%)和根长等特性得到了定量的改善,暴露于电场下的效果与未暴露于电场后的效果显着不同(p  <0.05)。

在微生物学表征的情况下,暴露于电场后,与对照土壤相比,细菌和真菌获得的CFU数量更多,两种情况下均增加2倍。与对照土壤中的CFU相比,电场显着增加了靠近阳极区域的CFU。电耕还改善了其他性能;在细菌的微观表征中,获得了更高百分比的革兰氏细菌,同时增加了靠近阳极的土壤有机质的百分比(42%),阳离子交换容量(6%)和酶活性(47%)与对照土壤中的结果相比。

更新日期:2021-01-06
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