Affected by the continuous replenishment of many cold air, in the first half of January to the beginning of February, most of the northern and central parts of Hainan Province have experienced three low-temperature and rainy weather processes. The low-temperature and rainy weather from January 4 to 17 is the most Seriously, five cities and counties in Haikou, Lingao, Zhangzhou, Baisha and Qiongzhong reached severe standards. The duration of the rainy and rainy periods in Zhangzhou and Linzhou reached 14 days and 10 days respectively, ranking the third in the same period in the past 20 years. More, second only to 2008 and 1993.
In January, the number of sunshine hours was 96.8 to 198.3 hours, which was generally less than 30% compared with the same period of the previous year. Among them, the number of sunshine in the north, east and central regions was 8 to 90%. From January 2nd to February 4th, the illuminating weather of less than 2 hours per day in the northern half of the region lasted for 30 to 34 days, and the duration of the illuminating weather was second only to 2008.
Since mid-February, the cold air affecting the whole province is still active. Although the intensity is weak, it has not caused the process of low temperature and rainy weather in our province, but most cities and counties still have many days of rainy and idling weather. The illuminating weather in February mainly occurred in the middle of the year, and the number of sunshine hours in each place was 3 to 28 hours, which was generally 5 to 90% less than the normal period. In early March, there were still a lot of illuminating weather, and the sunshine hours were only 17 to 46 hours. The northern and central and eastern coastal areas were 4 to 60% less than normal, and the rest were 2 to 30%.
Cold and rainy, the impact of weather on few sun Hainan agricultural production in
The continuous low temperature and rainy weather and the illuminating sunshine have an impact on the early rice, fruit trees, winter melons and aquaculture in our province. In general, the disadvantages are greater than the benefits.
Early rice: Early rice in the eastern region was first transplanted and divided in the middle and late January. At present, the early rice in Hainan Province is in the jointing stage in the east, the tillering stage in the central and southern parts, and the emergence stage in the north. Due to the fact that the temperature of most areas in most areas has been low and the number of sunshine hours has been significantly low since January, the early rice planting period has been significantly delayed. The early rice that has emerged from seedlings, tillers and joints has been affected to varying degrees, with slow growth and poor seedlings.
Melon and vegetables: low temperature and rain, and low sunshine weather are not good for the growth of melons. The flowering, pollination and fruit setting of melon crops were affected to varying degrees, and the phenomenon of falling flowers and fruit was more obvious. At the same time, the roots of melons are poorly grown, and the plants are poorly resistant, which is easy to breed pests and diseases. In addition, some areas are foggy early and late, which is not good for the prevention and treatment of local melon diseases.
Rubber: Low temperature and rainy weather is more favorable for the leaves and leaves of rubber tree leaves. The leaves of rubber plantation in the area north of Wuzhi Mountain are more obvious. The daily illumination is less, the rubber is prone to disease, and the wet and dry branches on the ground are also prone to pests and diseases.
Fruit trees: The continuous low temperature weather is beneficial to the flower bud differentiation and control of the late-maturing lychee and longan in our province, but it is unfavorable for the early-ripening lychee and mango flowering and fruit-bearing of "Zizixiao", and the growth of the northern spring banana fruit is affected.
Aquaculture industry: affected by low temperature, the feeding and growth of all cultured species are slow. Long-term low temperature, low rain and illuminating weather affect the photosynthesis of algae and other organisms in the water. The water quality is affected to some extent. Diseases and other diseases.
In addition, due to the recent occurrence of more precipitation in most parts of the province, the soil moisture in the corresponding areas has improved, but precipitation in some areas in the south and west is still less, and the drought in the corresponding areas continues.
Future weather forecasts and agricultural production measures recommended
It is expected that in the next 10 days, there will be light rain in the northern, central and eastern parts of the island in the early and late stages, and the rest will be cloudy. In the mid-term, the province was cloudy to sunny, and the temperature rose significantly. The average temperature in each region is slightly higher than the average annual average, and the rainfall is close to the average annual average.
Agricultural production measures recommended
1. Increase efforts to manage the early rice fields and reduce the adverse effects caused by the early low temperature weather. After the mid-term weather has warmed up, the organic fertilizer will be added in time to promote normal emergence, tillering and jointing growth.
2. Due to the serious impact on the growth of melons and vegetables, all growers will make timely remedial measures to reduce losses. It is a good time to pick up the weather and timely warn the fertilizer to improve plant resistance. Recently, Hainan winter melons began to enter a new round of listing peaks. The majority of growers should strengthen field management and seize the opportunity to do the harvesting, transportation and sales of melons and vegetables.
3. At present, the deciduous leaves in the rubber gardens in the whole province are relatively complete, but the effects of long periods of rain and dew make the ground accumulate dry branches and leaves decay faster, and it is easy to breed diseases. The winter tube work should promptly eliminate the source of rubber anthracnose. When the temperature rises, the southern region should pay attention to the extraction of new rubber leaves and strengthen the prevention and control of the two diseases.
4. At present, there are droughts in parts of the western and southern parts of the province. In the orchards where the small fruit is inflated, attention should be paid to water management to ensure normal expansion of the fruit. In the second half of the next year, the weather will improve. The "Zizixiao" litchi garden should spray foliar fertilizer in time to reduce the damage caused by low temperature and rainy weather. In addition, attention should be paid to strengthening disease prevention.
5. Aquaculture can add vitamins and immune enhancers to the feed to enhance physical fitness and improve immunity. At the same time, it is necessary to promptly remove the residual bait of the table to prevent bacterial growth. Try to reduce the number of fish scraping to avoid fish injury and water mold.
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