Figure 1 Early-season cropping agricultural weather forecast for March 19-21, 2011 Early rice planting three "most afraid" Horizontal Spiral Wing Water Meter Horizontal Spiral Wing Water Meter,Intelligent Water Meter,Brass Prepay Water Meter,Multijet Water Meter Shandong xuheng instrument co., ltd , https://www.xuhengmeter.com
Rice is one of the important food crops in China, with a planting area of ​​27% of the country's total grain area. The Chinese rice area can be divided into 6 rice-growing areas and 16 rice-based sub-regions. South China is a double-season rice-growing area. From February to March each year, it is the sowing and breeding period of early rice in South China.
At present, the early rice in the south-central South China has been planted, and the early rice in Hainan has entered the period of returning to the tillering stage. Some areas in the south of southern China and southern part of the south of the Yangtze River have entered the suitable sowing period, and the north-central part of the south of the Yangtze River has not yet been planted.
It is estimated that the average daily temperature in the south and south of the Yangtze River is above 12 °C on 19-21, and most of them are light rain or showery weather. The meteorological conditions in northwestern Guangxi, northern Fujian, southern Hunan and southwestern Jiangxi are suitable for early rice planting; however, northern Guangdong There will be 1 day of moderate rain, and the meteorological conditions are more suitable for early rice planting. 
1, low temperature and rain:
Temperature is an important meteorological factor for early rice, and low temperature is not suitable for sowing. In February and March, it was precisely the time when the cold air activity was very active. After the cold air goes south, if it is combined with the warm and humid airflow in the south, it will bring rainy weather and cool down.
Low temperature and rainy rain is the main agro-meteorological disaster in the early rice planting period in the southern region. The average temperature of the day is equal to or lower than 12 °C for 3 days or more (sometimes lasting 5-7 days or more), accompanied by rainy weather. Low temperature and rainy weather. This kind of weather is not conducive to the rooting and growth of the seedlings, and even the serious rotten seeds, rotten and dead seedlings.
2, the cold spring:
The cold spring is also a kind of severe weather that affects spring sowing. The cold spring refers to the temperature rises faster in the early spring, and then the temperature continues to be low for a while. The cold spring usually occurs in the second half of March to April, which will directly affect the normal growth of early rice and other seedlings.
3. Strong convective weather:
Since February and March, the weather in South China has begun to warm up. If you encounter cold air, it is easy to cause strong convective weather such as thunderstorms, strong winds and hail. Heavy rainfall is unfavorable for flowering pollination and affects early fruiting in early rice. Hail is also a great threat to the early rice that is still in the seedling stage, and it is easy to destroy the young wheat seedlings.
Concerns and suggestions:
1. In the south of the south of the Yangtze River and the northern part of southern China, it is necessary to seize the favorable weather in the near future to sow early rice; in the north and south of the Yangtze River, it is necessary to actively prepare for the early rice planting.
2, South China has planted areas to strengthen the management of the field, the film nursery field should pay attention to ventilation and refining and timely irrigation, to prevent the temperature is too high and burn the seedlings.
Total 1 | <First <Prev 1 Next> Last> |
share to: