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Second, the urine washing agent solution: has the two functions of nitrogen supply and cockroach. Weigh 0.5 to 1 kg of urea, 100 kg of water, and dissolve it into 70 to 100 g of washing powder. With the spray, do not put it for a long time.
Third, the superphosphate calcium leaching solution: has the effect of supplementing phosphorus and controlling cotton pests. Take 2 to 3 kg of high-quality powdered superphosphate, add 100 kg of water, stir well, place for 24 hours, filter, and take the filtrate spray.
4. Potassium dihydrogen phosphate solution: 300 g of potassium dihydrogen phosphate, sprayed on 100 kg of water.
5. Mixed solution of nitrogen, phosphorus and potassium: prepare 100 kg of calcium leaching solution of 2% to 3% concentration of calcium perphosphate, add 0.3 to 0.5 kg of urea and 1 to 1.5 kg of potassium sulfate.
6. Potassium sulphate solution: commonly used concentration of 1% to 1.5%, 100 kg of water, adding potassium sulfate 1 to 1.5 kg.
Seven, grass ash leaching liquid: take 5-7 kg of fresh grass ash without rain, 100 kg of water, stir for 14 hours, take the clarified liquid spray.
Eight, zinc sulfate solution: take 100 ~ 200 grams of zinc sulfate, add water 100 kg. If a small amount of lime aqueous solution is added to the prepared zinc sulfate aqueous solution, the spraying effect of the zinc fertilizer leaf surface can be improved.
Nine, borax solution: Take 200 ~ 300 grams of borax, 100 kilograms of water. Because borax dissolves slowly in cold water, it can be opened with 4 to 5 kg of warm water at 45 ° C, and then 95 to 96 kg of water.
X. Copper sulfate solution: 30 to 50 g of copper sulfate is added per 100 kg of clear water. To avoid poisoning, a small amount of lime water can be added.
11. Ferrous Sulfate Solution: Take 200-300 grams of ferrous sulfate and 100 kilograms of water. Because the iron fertilizer has poor fluidity in the leaves, it should be applied several times, and should be sprayed and sprayed finely. The front and back sides of the leaves should be sprayed. Add 50-70 grams of washing powder to 100 kg of iron fertilizer aqueous solution for better effect.
12. Manganese sulfate solution: Take 50-100 grams of manganese sulfate and spray 100 kilograms of water.
Thirteen, ammonium molybdate solution: take 50 ~ 100 grams of ammonium molybdate, add water 100 kg of foliar spray.
14. Biogas liquid dilution: The biogas slurry is rich in rapid nitrogen, and the leaves are easily absorbed, and the fertilizer efficiency is rapid. Take 10 kg of biogas slurry and spray 100 kg of water. Use immediately after dispensing to avoid nitrogen volatilization.
Fifteen, rare earth micro-fertilizer aqueous solution: foliar spray, can increase chlorophyll content and enhance photosynthesis. The spraying concentration of crops and fruit trees ranges from 0.08% to 0.10%. Add 80-100 ml of rare earth micro-fertilizer per 100 kg of clean water.
Fifteen methods for preparing crop foliar fertilizer
1. Urea solution: The commonly used concentration is 0.5% to 1%, 0.5 to 1 kg of urea, and 100 kg of clear water. The content of toxic diamine in urea is more than 1.5%, which cannot be used as foliar fertilizer.
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