1, greenhouse vegetables do not use large amounts of cooked cake fat. Because the ratio of carbon-nitrogen in the cake is small and the decomposition is fast, the high-temperature and high-concentration ammonia and organic acids are easily generated locally, and it is easy to burn the roots. The cake fat should be broken, soaked with human feces and urine for about 3 weeks, and then used after high-temperature fermentation.
2. Do not use ammonium sulfate in vegetable greenhouses in winter. Do not use ammonium bicarbonate. Ammonium sulfate is a physiological acid fertilizer that will increase the acidity of the soil and damage the soil structure after application. After the application of ammonium bicarbonate, a large amount of ammonia is volatilized, which is unfavorable for the growth of vegetables.
3, vegetable greenhouses do not use chemical fertilizers containing chlorine. Chloride ions can reduce the starch and sugar content of vegetables, make the quality of vegetables worse, the yield decreases, and chloride ions remain in the soil, can lead to acidification of the soil, easily lead to decalcification of the soil.
4, greenhouse vegetables do not apply fertilizer under drought conditions. Vegetables are hi-water crops. Fertilizing when the soil is dry, not only can the fertilizer effect not be fully exerted, but also the concentration of soil solution can suddenly increase, making it easier for the vegetables to burn their roots. Therefore, the fertilization of vegetables should be combined with irrigation, fertilization should be carried out, and the fertilizer should be irrigated afterwards, or the fertilizer should be applied along the water.
5. Do not use more diammonium phosphate in vegetable greenhouses in winter. Vegetables need a lot of nitrogen and potassium, and they need less phosphorus. In addition, it should be noted that diammonium phosphate should not be mixed with alkaline fertilizers such as grass ash to avoid ammonia volatilization and ammonia damage.
6, vegetable greenhouses are not suitable for topdressing potassium fertilizer in the later period. Vegetables generally require more potassium before and after flowering and gradually decrease thereafter.
7. It is not suitable to disperse phosphate fertilizers in vegetable greenhouses. Phosphorus is easily absorbed by the soil and loses its effectiveness. Therefore, phosphate fertilizers are suitable as basal fertilizers or concentrated in root-dense soil layers in the early stage of vegetables.
8. It is not appropriate to apply phosphate fertilizer and zinc fertilizer in vegetable greenhouses in winter. When zinc deficiency occurs in vegetables, 0.05%-0.2% zinc sulfate solution can be sprayed on the leaves.
9. Be careful not to apply iron fertilizer into the soil. Because iron is easily converted by the soil into poorly soluble compounds, it loses its effectiveness. Iron is not easy to flow on the leaves and it should be sprayed on the leaves. It can be sprayed on the leaves of vegetables with 0.1%-0.3% ferrous sulfate solution.
10. Do not apply Rare Earth Fertilizer directly to soil in vegetable greenhouses in winter. You can use 0.05%-0.07% of rare earth fertilizer solution sprayed on the leaves of vegetables, spraying 50-60 kg of solution per acre on it.
Ee Concentrates,Fish Oil Or Omega-3 Oil,Fish Oil 10/40 Ee,Fish Oil Ee Omega 3
ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com