Analysis of Water Retention Rate in Orchid Pot

Orchids grow best when the water retention rate of plants is 90% and 60%, and the humidity in the basin is in an ideal state. Dry plant material on the basin, orchids and pots weigh 1000 grams together, after fully watered, rest for a period of time, and so there is no gravity water flow out of the basin bottom, weigh again: 1400 grams, that is to say, the water absorption weight is 400g when the water retention is 100% (absorbing enough water). The ideal water weight in the orchid basin is 360g-240g, that is to say, the weight of the whole orchid is between 1360 g and 1240 g. More than 1360 grams are wet and less than 1240 grams are dry, so the orchids should be ventilated as soon as possible after watering, and the pot weight should be within 1360 grams as soon as possible, and then the basin surface should be moisturized by placing moist moss to prolong the time when the water is released to 1240 grams. When the basin weight is less than 1240 grams, it can be watered. This is the method I learned online. I managed a pot with this method, and the rest of the same plant materials are based on this time, and the effect is quite good so far. 1. Instead of using the saturated water content of 100% of the maximum water retention of the matrix as the experimental specimen, the thick water film formed by high water content for a long time prevents the root from contacting with oxygen, which will seriously affect the growth of the root system due to anaerobic respiration, which will eventually lead to root decay, so there is no need for experiment. 2. 90% of the maximum preservation rate of the substrate. Because the water film on the surface of the root system and the substrate is thick, the root system can absorb part of the water and maintain the aeration environment of the substrate, so the leaves grow rapidly, but the respiration is not sufficient, so the nutrient accumulation is not high. 3. 70% of the maximum water retention of the substrate, so that the root system has a good breathing environment, grows rapidly, accumulates rich nutrients, and enriches plant growth. 4. 50% of the maximum water retention of the substrate, the root system was difficult to absorb water, the growth was greatly inhibited, and the seedlings died after 60 days. 5. 30% of the maximum water retention of the matrix, there is only water slightly higher than the bound water in the matrix, which is very dry, and it is extremely difficult for the roots to absorb water, and even there is no water to be absorbed. The seedlings provide water because of the adult corms, and once the adult plants consume too much water, the seedlings die first, and eventually the adult plants run out of water and all die. From this, it can be judged that 90% of the maximum water retention of the matrix is 60%, which is the gradual adaptation stage of the national orchid growth from the gradually suitable →, while more than 90% of the maximum water retention and less than 60% are disadvantageous to the growth of the national orchid.