Rice is also "heat stroke"?Dr. Chuannong University to reveal the secret

With the big sun, one day is the day, is the rice in the field okay? "In the past few days, the rice in the Chengdu Plain began to pump flowers, which is the time to be sensitive to temperature." Deng Fei, a doctor of crop training and farming from Sichuan Agricultural University Agricultural College, said that continuous high temperature may cause rice production to reduce production, "summer avoidance" especially important.

Is rice "heat stroke"?

August 8th

The reporter followed Deng Fei and walked in

A paddy field in Dayi, Chengdu, Sichuan

Learn about the situation of rice at high temperature

Continuous high temperature or reduce pollen vitality reduction

The nature of rice is hot and wet, and there are certain requirements for temperature. To a certain extent, high -temperature weather will accelerate its growth. But the temperature is too high, and there will be side effects. "Occasionally a day or two high temperatures, rice is generally resistant; but the high temperature continues, such as three or four days or a week, rice will also be affected, especially when the rice dumping is particularly sensitive to temperature." Raise a rice, remove the rice grain -like ears, and find the flower medicine that looks like a small flower. "The temperature is too high, and the flower medicine is blocked, and the pollen in it will not come out." Deng Fei said.

Pre -judgment in advance, delay the sowing time "summer avoidance"

Deng Fei pointed at the white flower medicine that white is normal. If it is yellow, it means that the pollen is not out of the flower medicine. The output of rice is determined by 4 major indicators, including effective ears, the number of flowers per ear, strong rate, and weight. Popularly speaking, how many rice ears are there on the acre of the land, how many flowers are available on each spike, and how many Yinghua can form rice, and the weight of each rice. Deng Fei said that if continuous high temperature may inhibit the processing process of rice pollination, the fertilization rate will decrease; the fertilization rate decreases, and the strong rate will decrease; the decrease in the strong rate means reduction of production. The above process is intertwined, with obvious impact. For example, the vitality of pollen is reduced by 50%, and the final reduction may reach 50%.

"This rice delayed the sowing time for 'avoiding summer". " Deng Fei pointed to the rice fields around him that before sowing, he would make a prediction according to the temperature laws of previous years, and try to avoid the hottest time period. Occasionally a day or two during other time periods, which affects the controlled range. The heat waves are coming again in the past few days, and the temperature is around 35 ° C. For rice, it is still available. If the temperature is soaring to 37 ° C and 38 ° C, the fertilization of powder will be affected.

Water is the best "heatfall medicine"

If the temperature continues to rise, how can rice "avoid summer"? Deng Fei said, "For rice, the most effective and cheapest 'lower summer medicine' is water."

"Water can heat in winter, water can be dissipated in summer, and it is not expensive." Deng Fei said that there is sufficient water resources in the plain, even if the temperature is higher, you don't have to worry about it. In the face of high -level and water -deficient hills, in the face of continuous high temperature, the idea will change from "summer" to "heat -resistant", such as spraying of leaf surface fertilizer, including potassium dihydrogen phosphate, mossisin, and a large number of elements Water -soluble fertilizer, etc., improve high temperature resistance. At the same time, the above fertilizers can supplement the moisture and nutrition necessary for crop growth, increase resistance to high temperature, and cool down and humidify and reduce the impact of high temperature. It should be noted that the flowering period is to avoid the operation of plant protection and leaf surface fertilizer at high temperature. It is best to carry out in the early morning.

Source: Chuanguan News, Chengdu Agriculture

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