In the next 10 days, the southern stage of low temperature and rain will be unfavorable for early rice planting
2023-01-01 10:09:04
Since the early rice planting in South China in late February, agro-meteorological conditions have benefited most of southern China. The early rice planting period in the central and southern regions is close to normal or early in the year. However, due to the low temperature and rainy weather in the western region, the early rice planting progress is slightly affected. . Most of the early rice in the south of the Yangtze River will be planted in large areas from the middle of March to the beginning of April. The future weather conditions will have a certain adverse impact on early rice planting.
Early rice planting should pay attention to the weather impact information picture
Early rice in South China will enter the regreening period to the tillering stage. Early rice in South China began to be planted in late February, and Hainan early rice entered the greening till tillering stage. As of the end of March, the area of ​​early rice planting in Guangdong was 562.0 thousand hectares, 60% of the planting plan was completed, which was faster than the same period of last year. It has been transplanted 2.8 thousand hectares, less than the same period of last year; Guangxi has soaked up 10.256 million kilograms of early rice seeds. It accounted for 41% of the amount of broadcast, which was 2.3% higher than the same period of last year; the amount of early rice planted in Fujian was 3.953 million kilograms, and the area of ​​dissolved land was 132.1 thousand hectares. The progress was slightly slower than the same period last year.
Jiangnan early rice will continue to enter the sowing period. Most of the early rice in the south of the Yangtze River has not yet started planting, and will generally enter the suitable sowing period from the middle of March to the beginning of April. Jiangxi plans to plant 1516.5 thousand hectares of early rice, the largest area since 2001; Hunan early rice plan to plant 1800.0 thousand hectares, an increase of about 3.5% over last year, the current broadcast area is less than 3% of the planned area; Zhejiang only south of Wenzhou area began to sporadic Sowing early rice.
Figure 1 Average temperature anomaly from March 1 to 15, 2011 Figure 2 Rainfall days from March 1 to 15, 2011 Co.,
Analysis of agro-meteorological conditions during the sowing period of southern early rice in 2011. In late February, the temperature in most parts of South China was obviously high, and there was no continuous rainy weather. The weather conditions were conducive to early rice planting. Since March, the low-temperature and rainy weather in central and eastern China has been relatively short-lived, especially in the absence of continuous low-temperature weather with a daily average temperature of ≤12 °C, and due to the use of thin-film breeding in most areas, low-temperature weather has not caused the growth of early rice seedlings. Significant impact. The temperature in western South China has been low by 2 to 4 °C since March (Fig. 1), and the rainy day is 7 to 15 days (Fig. 2), and the sunshine is seriously insufficient. The low temperature, rainy and rainy weather has caused some delays in the early rice infiltration. In the late part of the first half of the month to the beginning of the first half of the month, the temperature in some areas has rebounded, the number of sunshine has increased, and the progress of early rice planting has accelerated significantly.
The impact of future weather conditions on early rice planting. It is expected that in the next 10 days, the weather in Jiangnan and South China will be gradually rainy, and the temperature will gradually drop. There will be 3 to 4 days of low temperature and rainy weather with an average daily temperature below 12 °C. The main rainfall period is 17 to 20 days. In addition, late March By the end of April, there will be staged low-temperature and rainy weather in the early rice planting area in the south of the Yangtze River, which will have certain adverse effects on early rice planting.
The agricultural production proposal is as follows:
1. The early rice in the south of the Yangtze River and the northern part of South China will enter the sowing period. All localities should actively prepare for the early rice planting, avoid the low temperature period, wait for the temperature to rise, then plough the grass, and adopt the method of dry breeding, throwing, etc. Effectively protect against low temperature hazards.
2. The early rice in the south and south of South China should be sown in time; the cultivated areas should strengthen the management of the sloping fields, and adopt measures such as adding film and adding hot fertilizer to improve the cold resistance of the seedlings and prevent rotten rot. After the temperature rises, the film nursery field should pay attention to ventilation and refining and timely irrigation to prevent the temperature from being too high and burn the seedlings.
3. All localities should do a good job of storing water in Kutang, save water, plan water, and allocate water resources to ensure smooth transplanting of early rice.
Knowledge about rice planting:
To determine the rice planting period should pay attention to three points: First, the climatic conditions are appropriate, second, according to the characteristics of the variety, and third, it is conducive to the convergence of the front and back. Generally speaking, the average temperature for three consecutive days can be stabilized when passing through 12 °C, and the temperature can be stabilized. When the temperature is stable, the drought can be spread by drowning or dry breeding at 10 °C, and the cold tail warmth is used to sow.
In the sowing and seedling stage of rice, low temperature freezing damage is likely to cause extensive damage to rice. Rice seedlings will be yellowed, withered and dead in different degrees due to freezing damage. The field is lacking in seedlings. The weather forecast is closely monitored before and after the occurrence of freezing damage. The spraying of Tianda 2116 drought-resistant seedlings is carried out 2-4 days before the onset of low temperature. After freezing, use Tianda 2116 and carbendazim to repair the frozen seedlings, and also take time to replenish the seedlings.
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