Q: In the South, there is both single-season rice and double-season rice.
Experts: The single-season rice has a long growing period and high yield. Generally, it will grow for 90 to 120 days, and produce more than 500 kg per mu. Therefore, the amount of fertilizer is relatively high, but the proportion of basal nitrogen is relatively low, accounting for about 50%, and both tiller and panicle fertilizer are equal.
The specific fertilization plan is: basal fertilizer Mushi urea 8 to 12 kg or ammonium bicarbonate 20 to 30 kg, potassium chloride 8 to 10 kg. You can also apply compound fertilizer, Mushi 30 to 40 kg. Base fertilizer is applied when planting before transplanting. Top dressing twice, after transplanting 10 to 15 days into the tiller, Mushi urea 8 ~ 10 kg, 35 ~ 40 days after transplanting panicle panicle fertilizer, Mushi urea 10 ~ 12 kg or ammonium bicarbonate 25 ~ 35 kg.
Question: Single-crop rice refers to rice that is grown only once a year. How should fertilization be used for double-season rice?
Experts: Two-season rice is divided into early rice and late rice. There are two points to pay attention to in fertilizing: First, the two pods as a whole, the main phosphorus fertilizer to the former wolfberry, potassium fertilizer is mainly to rake. Second, compared with single-crop rice, the double-cropping rice has a short growing period, generally less than 90 days, and the yield is relatively low. The yield per mu is 400 to 500 kg. Therefore, the amount of fertilizer is less than that of single-season rice. Due to the short growing period, the peak of nutrient absorption is relatively concentrated and advanced, so we must re-supply basal fertilizer and top-dressing fertilizer. Fertilizer can be applied sparingly, or only some foliar fertilizers. The specific plan is: basal fertilizer Mushi urea 10 to 15 kilograms, or ammonium bicarbonate 30 to 40 kilograms, superphosphate or calcium magnesium phosphate fertilizer 20 to 25 kilograms, potassium chloride 8 to 12 kilograms. 10 to 15 days after transplanting, applying fertilizer, Mushi urea 5 ~ 10 kg or ammonium bicarbonate 15 ~ 25 kg. 30 to 35 days after transplanting, fertilize as appropriate, Mushi urea 3 ~ 5 kg, or spray two foliar fertilizer, foliar fertilizer concentration: urea 0.5% to 1%, potassium dihydrogen phosphate 0.2% ~ 0.3% .
Q: In July and August in southern and coastal areas of China, high temperatures and heavy rainfall coincide with rice grain formation. Does it have an impact on rice growth and fertilization?
Experts: Continuous high temperature and heavy rain affect the grouting of rice, and the grain is not full, resulting in the phenomenon of “high temperature ripeningâ€. This will not only reduce production, but also reduce the quality of rice. Overcast and rainy days may also wash away fertilizers and pests and diseases from rice fields. Four countermeasures are suggested for this: First, spraying several foliar fertilizers successively, one can cool the rice, and the other can supplement the lost nutrients. The second is to intensify water management, and to prevent the running of paddy fields that have just been fertilized; to drain the blocks where rice may be submerged in time, and to clear the ditch to prevent the accumulation of water in the fields where the rice is changed to dry land after harvest. The third is to strengthen the control of pests and diseases. The fourth is to select rice varieties suitable for growth period. In the double-cropping area, early-maturing or early-maturing varieties should be selected for early rice, and late-season rice varieties should be selected based on timely early sowing of early japonica rice in order to control the heading date of early and late rice at six. At the end of the month and early September, it escaped high temperatures and rainy weather in July and August.
Experts: The single-season rice has a long growing period and high yield. Generally, it will grow for 90 to 120 days, and produce more than 500 kg per mu. Therefore, the amount of fertilizer is relatively high, but the proportion of basal nitrogen is relatively low, accounting for about 50%, and both tiller and panicle fertilizer are equal.
The specific fertilization plan is: basal fertilizer Mushi urea 8 to 12 kg or ammonium bicarbonate 20 to 30 kg, potassium chloride 8 to 10 kg. You can also apply compound fertilizer, Mushi 30 to 40 kg. Base fertilizer is applied when planting before transplanting. Top dressing twice, after transplanting 10 to 15 days into the tiller, Mushi urea 8 ~ 10 kg, 35 ~ 40 days after transplanting panicle panicle fertilizer, Mushi urea 10 ~ 12 kg or ammonium bicarbonate 25 ~ 35 kg.
Question: Single-crop rice refers to rice that is grown only once a year. How should fertilization be used for double-season rice?
Experts: Two-season rice is divided into early rice and late rice. There are two points to pay attention to in fertilizing: First, the two pods as a whole, the main phosphorus fertilizer to the former wolfberry, potassium fertilizer is mainly to rake. Second, compared with single-crop rice, the double-cropping rice has a short growing period, generally less than 90 days, and the yield is relatively low. The yield per mu is 400 to 500 kg. Therefore, the amount of fertilizer is less than that of single-season rice. Due to the short growing period, the peak of nutrient absorption is relatively concentrated and advanced, so we must re-supply basal fertilizer and top-dressing fertilizer. Fertilizer can be applied sparingly, or only some foliar fertilizers. The specific plan is: basal fertilizer Mushi urea 10 to 15 kilograms, or ammonium bicarbonate 30 to 40 kilograms, superphosphate or calcium magnesium phosphate fertilizer 20 to 25 kilograms, potassium chloride 8 to 12 kilograms. 10 to 15 days after transplanting, applying fertilizer, Mushi urea 5 ~ 10 kg or ammonium bicarbonate 15 ~ 25 kg. 30 to 35 days after transplanting, fertilize as appropriate, Mushi urea 3 ~ 5 kg, or spray two foliar fertilizer, foliar fertilizer concentration: urea 0.5% to 1%, potassium dihydrogen phosphate 0.2% ~ 0.3% .
Q: In July and August in southern and coastal areas of China, high temperatures and heavy rainfall coincide with rice grain formation. Does it have an impact on rice growth and fertilization?
Experts: Continuous high temperature and heavy rain affect the grouting of rice, and the grain is not full, resulting in the phenomenon of “high temperature ripeningâ€. This will not only reduce production, but also reduce the quality of rice. Overcast and rainy days may also wash away fertilizers and pests and diseases from rice fields. Four countermeasures are suggested for this: First, spraying several foliar fertilizers successively, one can cool the rice, and the other can supplement the lost nutrients. The second is to intensify water management, and to prevent the running of paddy fields that have just been fertilized; to drain the blocks where rice may be submerged in time, and to clear the ditch to prevent the accumulation of water in the fields where the rice is changed to dry land after harvest. The third is to strengthen the control of pests and diseases. The fourth is to select rice varieties suitable for growth period. In the double-cropping area, early-maturing or early-maturing varieties should be selected for early rice, and late-season rice varieties should be selected based on timely early sowing of early japonica rice in order to control the heading date of early and late rice at six. At the end of the month and early September, it escaped high temperatures and rainy weather in July and August.
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