The function control system of a glass greenhouse is not only used for crop irrigation, but also for monitoring the temperature and humidity inside the greenhouse, timely ventilation of the greenhouse, and controlling the sunshades inside the greenhouse. By controlling these data, the growth environment of crops in the greenhouse has reached a good state. After the construction of the glass greenhouse is completed, attention should be paid to the correct method of fertilization. As for how to apply fertilizer correctly, we will tell you in detail below.
Improper application of chemical fertilizers and vegetable fertilizers in glass greenhouse vegetables not only leads to excessive levels of nitrate and nitrite in vegetables, but also affects human health and vegetable quality. Planted vegetables need to be decomposed when they can be fertilized with farmyard manure. Because we do not have a fully decomposed farm manure containing bacteria and insect eggs, it is easy to spread diseases to Chinese vegetables when applied to them. At the same time, do not decompose farm manure in a glass greenhouse, as it will produce a large amount of different ammonia gases, which is not good for vegetable seedlings. Excessive application of fertilizers can increase soil salinity and lead to soil salinization. Control the amount of nitrogen fertilizer, increase the amount of phosphorus and potassium fertilizers, and prohibit or reduce the use of nitrate nitrogen fertilizers, such as ammonium nitrate, potassium nitrate, and compound fertilizers containing nitrate.
In a glass greenhouse, increasing ventilation time and light intensity can reduce the nitrate content in vegetables. It is not recommended to use chlorine containing fertilizers because chloride ions can reduce the starch content in vegetables, thereby reducing quality. Residues in the soil can easily cause soil compaction. Reduce the use of magnesium sulfate and ammonium sulfate, as sulfate ions are not easily absorbed by vegetables and can remain in the soil after long-term application, endangering vegetable growth.
