Prevention of Fertilizer damage of Orchid

The normal growth of orchids requires constant absorption of nutrients from plants or extra-root environments. When the nutrient elements in the plant are continuously absorbed, the nutrients will be gradually insufficient and must be replenished in order to maintain the nutrients in the plant. In particular, the use of non-soil plant materials is even more necessary to constantly supplement the nutrients in the plant materials. The supplement of nutrient elements is mainly achieved by fertilization. However, when fertilizing too much, it will do great harm to orchids, especially some weak or old plants are more vulnerable.

In order to prevent fertilizer damage, the effective method is to use conservative fertilization method to dilute all kinds of commercial fertilizers sold in the market by 0.5 times as much as the required concentration. For the newly adopted fertilizer, whether it is inorganic fertilizer or self-made organic fertilizer, the early adaptability test (generally using the same kind of low-grade flowers) must be carried out before it is used in large quantities, and it must be observed for about 2 weeks. If there are no problems, it can be used in a large area. It is not suitable to fertilize orchids in overcast and rainy weather or high temperature and humidity weather, because the air humidity is high, water is difficult to evaporate, and the roots are not easy to absorb nutrients. Orchid fertilization is best done in the sunny morning (in order to make photosynthesis function). Water is poured again 5-6 hours after fertilization to wash the fertilizer.

Once the orchid is damaged by fertilizer, the main manifestation is that the root system is destroyed and it is difficult to absorb water and wilt. After this situation occurs, the more feasible remedy is: the orchid must be poured out immediately, the root must be soaked in clean water for 1 hour or 2 hours, and after being cool-dried, put on the new plant material, and then soak the orchid plant in flowing water for 5 hours for 6 hours. In this way, a considerable part of the nutrients in the orchid plant can be washed away and its growth can be restored. If it is not suitable to turn the basin in the high temperature season, the original basin can be soaked in flowing water for 10 hours.

In addition, when nitrogen fertilizer is used too much, orchids will grow too much, which can restrain absorption by controlling water, improve light conditions, increase photosynthate, and accelerate dry matter accumulation. (Xinyuanxuan)