Late rice fertilization addition and subtraction

Potassium-reducing phosphorus can be used as a phosphorus fertilizer in early rice, and late-season rice can be treated with less or no phosphorus fertilizer. If compound fertilizer is used as top dressing, nitrogen and potassium binary compound fertilizers can be used. This way, fertilizer costs are relatively low. For late rice, Mu 25% compound fertilizer 25 to 30 kilograms plus potassium chloride 5 kilograms, its fertilizer efficiency is close to 20 to 25 kilograms of 45% compound fertilizer, while the former fertilization costs lower than the latter by more than 1/3 . For 20% potassium-nitrogen compound fertilizer, 30-35 kg can be applied in Mushi. Can also use urea 15 to 20 kg, potassium chloride 10 to 15 kg topdressing. If the base fertilizer is applied with ammonium bicarbonate or compound fertilizer, the single fertilizer is generally used for top dressing, 10-15 kg of mu for urea, and 5-15 kg for potash fertilizer.

Nitrogen control and early application of nitrogen in late rice should adopt a "control" strategy. Former crops are corn, early rice and other fertilizer-consuming crops, the late rice to ensure appropriate nitrogen levels, acres of nitrogen topdressing urea 15 to 20 kg, do not blindly reduce nitrogen; before the work is watermelon, pepper and other vegetables, generally mu urea 7.5 ~ About 10 kilograms; the former is soybeans, peanuts and other legumes of the late rice can be less nitrogen fertilizer, the general application of urea 5 ~ 7.5 kg. For returning straw to the field, special attention should be paid to early application of available nitrogen fertilizer to prevent nitrogen deficiency caused by microbial uptake of nitrogen. Normally, topdressing nitrogen fertilizer is applied about 5 days after late rice cutting (throwing), and it is applied together with potash fertilizer.

The advantage of middle-season spiker hybrid late-season rice production is that the panicles are large, and the yield depends on big spikes to win. Therefore, in the middle of late rice, it is necessary to make up for the fat: For the yellowing of the leaves, and the lack of fertilizer in the Qiu block, after the late rice field or the field control, combined with rehydration, Mushi urea 2 ~ 3 kg, but to strictly control the dosage, Strictly prevent late marriage.

Late grain fertilizer in the heading stage, mu grain full 50 grams, 250 grams of urea, can also be used 300 grams of potassium dihydrogen phosphate plus urea 250 grams, 50 kilograms of water spray on the foliage.

Author: Long Vanves

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