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 the "control" strategy. Former crops are corn, early rice and other fertilizer-consuming crops, then the late rice to ensure appropriate nitrogen levels, acres of topdressing nitrogen fertilizer 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 rice straw to the field, we must pay particular attention 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 control of the open field, 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 and urea 250 grams, 50 kilograms of water spray on the foliage.
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