The function and injury of fertilizer

Fertilizer is the nutrient of cultivated plants, which can be divided into two categories: chemical fertilizer and organic fertilizer. Mixed with soybean cake, wheat husk, rice bran or other shell dregs, fish meal, bone meal, soaked in clear water, stirred and left to be fermented, or animal excreta, commonly known as organic fertilizer.

Asphyxiate, phosphoric acid and Gary are generally called the three elements of chemical fertilizers. Because it is made by chemical method, it is called chemical fertilizer. Both organic fertilizer and chemical fertilizer can stimulate plants and promote their rapid development and growth at the same time. Due to excessive fertilization, the stimulation to the plant is too great, so the situation of slander occurs, which is called fertilizer injury, also known as fertilizer injury. If the plants are too fat-injured, the whole plant will die in serious cases, and the slight ones will linger after being injured and lose their normal growth and reproduction.

National orchid-its individual structure and its living function are different from other plants. Its resistance to fertilizer stimulation is particularly fragile. Therefore, when applying fertilizer, we must pay special attention to the weight of fertilizer. The amount of fertilizer would rather be insufficient than excessive. Insufficient can also receive the considerable effect of fertilization, excessive is the calamity of slander!

Once the orchid plant has been injured by fat, it is difficult to return to normal development. Often for a moment of negligence, due to excessive fertilization, the sacrifice of rare and valuable products in vain. Therefore, do not use casually heard methods, to make hasty imitation, in order to avoid painful failure!

If you start to use some kind of fertilizer that has not been used before, do not use enough fertilizer at once. It should be tried out first according to the general quantitative concentration of 60% to 80%. The reaction of the orchid plant must be carefully observed within a week after fertilization.

After fertilization, if the leaf color becomes dark green and there is no other anomaly, it is the phenomenon that the fertilizer works. If the leaf tip is burned after fertilization, or the leaf trousers that should not be dried up suddenly dry up, or the young leaves that are growing show focus or strange spots as a result of fertilization, that is, they have suffered large or small fat injuries.

For those with mild symptoms of vilification, immediately replace the aquatic plants covered in the basin and rinse the material in the basin. If the situation is serious, it must be uprooted immediately, the whole plant must be washed clean, the original pots and culture materials should be replaced, and it should be replanted and transferred to the orchid room in a cool and ventilated position. Avoid sunlight, only water, stop fertilizing or spraying pesticides.

If the leaf color remains unchanged after fertilization, or without any abnormality, the concentration can be slightly increased in the next fertilization, but it is best not to increase to the maximum height of the general quantity. (Wu Anlu)