1, pay attention to the application of CO2 gas fertilizer
Appropriate application of CO2 gas fertilizer can make the plant grow robust and improve product quality and yield.
2, pay attention to the fertilizer characteristics of vegetables
The general fertilization principle of vegetables is that leafy vegetables pay attention to nitrogen fertilizer, fruit vegetables pay attention to phosphate fertilizer, roots and stems focus on potassium fertilizer, and balanced fertilization should be carried out.
3, note that phosphate fertilizer and zinc fertilizer can not be mixed
Antagonism between phosphorus and zinc often occurs, and excessive use of phosphate can inhibit the absorption of zinc. Greenhouse greenhouses have high temperature and high humidity, and the effectiveness of phosphorus is 2 to 3 times higher than that of open fields. Therefore, pay attention to reducing the amount of phosphorus in order to prevent the effectiveness of zinc. If zinc deficiency occurs, it can be sprayed with 0.05% to 0.2% zinc sulfate.
4, pay attention to the antagonistic relationship between potassium and magnesium
Potassium and magnesium often have antagonism, so when applying potassium fertilizer to vegetables, it must be fertilized by soil and crops. For example, after the application of potassium fertilizer, the yellow and white veins of the cucumber veins and the veins are still green; yellow plaques are first found in the middle leaves of the tomatoes. Magnesium sulfate or calcium magnesium phosphate leachate can be sprayed in the absence of magnesium.
5, pay attention to the appropriate amount of nitrogen fertilizer
Excessive nitrogen fertilizer not only has high nitrate content in vegetables, it does not reach the pollution-free standard, but also inhibits the absorption of some other elements. Excessive application of nitrogen fertilizer will affect the absorption of calcium, causing the longitudinal splitting of the eggplant slices, the cork of the flesh, the browning and rot of the cabbage, and the symptoms of boron deficiency in vegetables, such as the baldness of vegetable seedlings.
6, pay attention to the application of ammonium chloride or potassium chloride
Because chloride ions can reduce vegetable starch and sugar, deteriorate quality, reduce yield, and still remain in the soil, poisoning roots or causing soil compaction and increasing soil salinity.
7, pay attention to greenhouse vegetables should not be applied to ammonium bicarbonate
Ammonium is extremely volatile to ammonia, especially in greenhouses where the temperature in the greenhouse is high and the volatilization is even worse. Even if the wind is ventilated during the day, it can't be applied with water or caves to prevent the vegetables from being smothered by ammonia and causing death.
8, pay attention to the use of phosphorus fertilizer effectiveness
Phosphate fertilizer is not easy to move in the soil, and is easily absorbed and fixed by the soil after contact with the soil. Therefore, the phosphate fertilizer should be granulated or dispersed and concentrated.
9, pay attention to the use of potash effectiveness
Vegetables with short growth period can be applied at one time, and the long growing period can be traced to half. It is best to apply potassium fertilizer before flowering, and the late potassium deficiency should be sprayed on the foliage.
10, iron is easily converted into poorly soluble compounds by the soil and loses fertilizer efficiency, and can not be recycled in vegetable leaves, sprayed with 0.1% ~ 0.3% aqueous solution of ferrous sulfate, sprayed fine, and every 5 ~ Spray continuously for 2 to 3 times in 7 days. If iron fertilizer is applied or applied, it should be mixed with organic fertilizer and mixed.
Appropriate application of CO2 gas fertilizer can make the plant grow robust and improve product quality and yield.
2, pay attention to the fertilizer characteristics of vegetables
The general fertilization principle of vegetables is that leafy vegetables pay attention to nitrogen fertilizer, fruit vegetables pay attention to phosphate fertilizer, roots and stems focus on potassium fertilizer, and balanced fertilization should be carried out.
3, note that phosphate fertilizer and zinc fertilizer can not be mixed
Antagonism between phosphorus and zinc often occurs, and excessive use of phosphate can inhibit the absorption of zinc. Greenhouse greenhouses have high temperature and high humidity, and the effectiveness of phosphorus is 2 to 3 times higher than that of open fields. Therefore, pay attention to reducing the amount of phosphorus in order to prevent the effectiveness of zinc. If zinc deficiency occurs, it can be sprayed with 0.05% to 0.2% zinc sulfate.
4, pay attention to the antagonistic relationship between potassium and magnesium
Potassium and magnesium often have antagonism, so when applying potassium fertilizer to vegetables, it must be fertilized by soil and crops. For example, after the application of potassium fertilizer, the yellow and white veins of the cucumber veins and the veins are still green; yellow plaques are first found in the middle leaves of the tomatoes. Magnesium sulfate or calcium magnesium phosphate leachate can be sprayed in the absence of magnesium.
5, pay attention to the appropriate amount of nitrogen fertilizer
Excessive nitrogen fertilizer not only has high nitrate content in vegetables, it does not reach the pollution-free standard, but also inhibits the absorption of some other elements. Excessive application of nitrogen fertilizer will affect the absorption of calcium, causing the longitudinal splitting of the eggplant slices, the cork of the flesh, the browning and rot of the cabbage, and the symptoms of boron deficiency in vegetables, such as the baldness of vegetable seedlings.
6, pay attention to the application of ammonium chloride or potassium chloride
Because chloride ions can reduce vegetable starch and sugar, deteriorate quality, reduce yield, and still remain in the soil, poisoning roots or causing soil compaction and increasing soil salinity.
7, pay attention to greenhouse vegetables should not be applied to ammonium bicarbonate
Ammonium is extremely volatile to ammonia, especially in greenhouses where the temperature in the greenhouse is high and the volatilization is even worse. Even if the wind is ventilated during the day, it can't be applied with water or caves to prevent the vegetables from being smothered by ammonia and causing death.
8, pay attention to the use of phosphorus fertilizer effectiveness
Phosphate fertilizer is not easy to move in the soil, and is easily absorbed and fixed by the soil after contact with the soil. Therefore, the phosphate fertilizer should be granulated or dispersed and concentrated.
9, pay attention to the use of potash effectiveness
Vegetables with short growth period can be applied at one time, and the long growing period can be traced to half. It is best to apply potassium fertilizer before flowering, and the late potassium deficiency should be sprayed on the foliage.
10, iron is easily converted into poorly soluble compounds by the soil and loses fertilizer efficiency, and can not be recycled in vegetable leaves, sprayed with 0.1% ~ 0.3% aqueous solution of ferrous sulfate, sprayed fine, and every 5 ~ Spray continuously for 2 to 3 times in 7 days. If iron fertilizer is applied or applied, it should be mixed with organic fertilizer and mixed.
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