电肥科学家们观察发现，作物体内的电位同大气的电位差越大，作物的光合作用也就越强。科学家做了个有趣的实验：将西瓜种子浸泡在75伏电的稀盐酸溶液里，西瓜的含糖量增加了4％，产量提高10％。声肥不同频率的音调对植物有不同的刺激作用。如强烈、尖锐的噪声能抑制作物生长， Observations of electricity and fertilizer scientists found that the greater the potential difference between the body of the crop and the atmosphere, the stronger the photosynthesis of crops. Scientists made an interesting experiment: soaked watermelon seeds in 75 volt dilute hydrochloric acid solution, watermelon sugar content increased by 4%, the yield increased by 10%. Phonetic tone of different frequencies have different stimulating effects on plants. Such as strong, sharp noise can inhibit crop growth,