Affected by the cold air, there will be a strong cooling weather process in Chengdu from the evening of the 14th to the 17th, and the minimum temperature will drop to about -3 °C.
Low temperature frost injury can cause frostbite of late-maturing citrus fruits or exacerbate overwintering fruit drop. Today, this reporter saw in the National Modern Agricultural Industrial Park of Pujiang County, Chengdu City, that patches of late-maturing citrus trees are scattered, and the round and full fruits are hanging all over the branches.
Under the guidance of agricultural technicians in Pujiang County, more than a dozen workers shuttled under the orange trees, skillfully stretching, covering and fixing the film, holding up a protective umbrella for the late-maturing citrus "Chunjian" that is about to ripen, and at the same time, extending the market supply period and seizing the Spring Festival sales period.
"I have planted more than 10 acres of 'spring see', and today I have covered almost 80% of the film, which can not only achieve the effect of anti-freezing, but also have the effect of preservation, which can prolong the market time of the fruit. Uncle Li, a fruit farmer, introduced.
"This cold wave may cause the minimum temperature in the basin to reach -3°C, and the air in the low-lying areas is not easy to circulate, and the cold air gathers, and the temperature may be lower. Once the temperature drops below -2.8°C and lasts for more than 6 hours, there is a risk of citrus frost damage. In response to this strong cooling weather, the person in charge of the Agricultural Technology Extension Center of the Pujiang County Agriculture and Rural Bureau suggested that qualified growers should cover the film in the appropriate area in time and take protective measures.
However, does the film have to be covered everywhere and how?
"The cover film has obvious anti-frost function, but it has different effects in different locations, and a poor cover may even exacerbate the frost and bring losses. According to reports, the landform of Pujiang River is dominated by shallow hills, no high mountains, and many flat dams. Among them, the top of the hill and the waist have good air circulation, good light, good cold air dispersion effect after cooling, and the temperature rises quickly. However, flat dams and low-lying areas are easy to cause cold air to accumulate, and if the film is covered for a long time, it is not conducive to the evacuation of cold air and the rise of temperature. Therefore, according to the topography and climatic conditions, the film should be covered in time, mainly in low-lying areas, and removed in time after the passage of the cold wave.
"Not only will this ensure that they can escape the frost, but it will also extend the harvest period, sell them at a high price in a healthy way, and increase the economic benefits for the growers." The relevant person in charge of the Pujiang County Agriculture and Rural Bureau said that there are about more than 100,000 acres of late-maturing citrus in the county, which needs to face a low temperature and cold wave. The bureau has sent agricultural technicians to towns and villages to guide farmers in the fields to cover the film in time so that citrus can safely overwinter.
Chengdu Daily Jinguan News Reporter Su Xinlin Editor-in-charge He Qitie Editor Wen Zhu Photo courtesy of Pujiang County Agriculture and Rural Bureau