到了夏季,经常碰到水肥水瘦的问题,尤其是对基层养殖户,由于没有显微镜,大多数是用肉眼观察水色来判断。但是由于各人的辨色能力及视力不一样,就是对同一池塘的水各人的判断也不一致。再者,有时施肥能直 In the summer, water and fertilizer are often encountered thin and thin, especially for grassroots farmers, because there is no microscope, most of them are to observe the aqua with the naked eye to judge. However, due to their different ability to identify color and different eyesight, the judgment of each person in the same pond is inconsistent. Again, sometimes fertilizers can be straight