How to spray rice foliar fertilizer
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First, grasp the timing Generally, it is most suitable for spraying in early rice, early spike, grouting and heading, and it takes more than one hour to spray per acre. If the spraying is at the time of the heading and flowering, it should be sprayed before the morning and after 4:00 in the morning; if it is in the big breast and the filling period, it will be sprayed before 11 am or after 4 pm on a sunny day.
Second, processing liquid fertilizer A variety of quick-acting NPK fertilizer, potassium dihydrogen phosphate, triacontanol, borax, silkworm manure, human and animal urine can be used as foliar fertilizer, not much per acre, but must be processed into liquid fertilizer. The day before the spraying of the quick-acting fertilizer is dissolved by 5 to 10 times of water to prevent the burning of the leaves. The human and animal urine should be firstly decomposed in the pool. The silkworm feces should be dissolved in 10 times of water first, filtered after 24 hours, and then sprayed with sufficient water; the borax is first broken, and the mixture is stirred with a small amount of water to form a concentrated liquid. Shi.
Third, according to the growth of the seedlings symptomatic spray fertilizer 1 leaf color green, heading neatly sprayed with phosphorus and potassium mixed fertilizer. 0.25 grams per mu of urea, 0.5 kilograms of superphosphate, 0.25 kilograms of potassium chloride plus 60 kilograms of water; or 2.5 to 3.7 kilograms of fermented cow urine per acre 1 kg of water 60 kg; or urea 0.5 kg, potassium dihydrogen phosphate 100 g water 60 kg spray. 2 The leaves are green and yellow, the fields are not well-growth, the fields are thin and the fields are thin, the nitrogenous fertilizer is the main, and the nitrogen and phosphorus are combined. 0.8 kg of urea per acre, 60 kg of superphosphate with 0.5 kg of water; or 5 kg of decomposed human urine, 0.5 kg of superphosphate, not 60 kg; or 0.5 kg of urea, phosphoric acid 100 grams of potassium hydrogen was sprayed with 60 kilograms of water. This field should be sprayed 1 or 2 times. 3 The seedlings grow well, the leaves are dark green on the upper or middle and upper fields, sprayed with potassium dihydrogen phosphate, 100 grams of phosphorus potassium per acre, or fresh grass ash 1. 5 to 2 kg (first 5 to 8 kg of hot water for 2 to 3 hours), or 0.5 kg of potassium chloride and calcium superphosphate, and 75 g of borax to 50 to 60 kg of water.