Can Huaihua grow lychees?

Can be planted but not suitable for planting.

Litchi is a tropical and subtropical fruit, which is mainly planted in tropical and subtropical areas with north latitude18 30. Litchi in China is mainly planted in Guangdong, Guangxi, Fujian, Sichuan, Yunnan, Taiwan Province and other provinces. At present, the planting area in Guangxi is about 365,438+10,000 mu, mainly distributed in Qinzhou, Yulin, Guigang, Wuzhou and Nandi.

1. Requirements of litchi growth and development on temperature conditions

When the ground temperature is 2326℃, the root system of litchi grows fastest. The lowest temperature of tree top growth is 16 18.5℃, and the fastest temperature is 2429℃. The lowest temperature of flower bud differentiation is 0.2℃. When the lowest temperature is lower than -2℃, the floral organ is easy to freeze to death. When the temperature was stable over 65438 03℃, litchi began to blossom, and the pollen germination rate was the highest at 2024℃. When the temperature is higher than 2627℃, flower bud differentiation and germination are inhibited.

Second, litchi's requirements for water conditions

It grows well in the area with annual rainfall 1000 1800 mm, and the growth of branches needs sufficient water. If it rains once every 57 days or there is enough water for irrigation, the branches will germinate quickly and grow vigorously, which is conducive to the formation of mature and fruitful mother branches. The flower bud differentiation period needs relatively dry weather. However, after the miscellaneous ear is pulled out, a proper amount of water is needed to facilitate the growth of the ear; Fruit needs water most during the expansion period, but heavy rain or continuous rain will cause downy mildew of fruit, resulting in a large number of fruit drop.

Third, the requirements of litchi for sunshine conditions

Litchi branch growth and flower bud differentiation need some sunshine, but too strong sunshine and a large amount of evaporation of water are easy to cause filament withering, stigma consolidation and pollination difficulties. When the fruit is ripe, it needs enough sunlight to improve its color and taste. Four, the adverse weather types of flowering and fruiting

1, low temperature and rainy type. Low temperature and rainy for more than 5 10 days (the daily average temperature is lower than 16℃ and the daily rainfall is 2 10 mm). The anthers of male flowers do not crack and loose powder, pollen loses its germination ability, and insects such as bees stop moving because of low temperature and rainy weather.

2. The shower cools quickly. The northeast wind is 5 10 m/s, moderate to heavy rain, even heavy rain, the temperature drops by more than 5℃, and a large number of female flowers fall off.

3. Strong wind and dry cooling type. When there is a 67-level gale, the temperature drops by more than 5℃ and the relative humidity is less than 60%, it will cause a large number of falling flowers.

Five, the relationship between fresh fruit storage and meteorological conditions

Litchi ripens at high temperature and humidity, with high water content and sugar content. Not resistant to long-distance transportation and storage after harvest. At the room temperature of 28℃, it will generally deteriorate and rot in a week or so. Cold storage or spontaneous modified atmosphere can keep fresh and prevent decay. Generally, spontaneous controlled atmosphere storage is adopted, that is, litchi is bagged and sealed. At the low temperature of 15℃, the spontaneous preservation of litchi in low oxygen and high carbon dioxide storage environment is caused by its own respiration, and it can be kept fresh for 3040 days.

Determination of the northern boundary of tropical and subtropical fruits such as litchi and longan

Division index: the frequency of annual extreme minimum temperature ≤0℃ ≤20% is used to divide the northern boundary of litchi and longan planting in Guangxi.

North boundary: south of Wuxuan New City in Pingnan, Rong County, south of Du 'anchang, northeast of Baise and north of Xilin. The area south of the boundary has good wintering conditions and is a suitable cultivation area for litchi and longan. The counties and cities north of this limit have poor wintering conditions, and litchi and longan are generally not suitable for large-scale planting because of their high probability and high risk. Wuzhou, Cenxi and tengxian are one of the litchi and longan producing areas in our region, but the wintering conditions in this area are not ideal. Mainly the mountains in western Guangdong are in the east, and there are clouds and mountains in the southeast. It is difficult to discharge the cold runoff formed after the cold wave sinks into valleys and low-lying areas. It is the most severely damaged area of litchi and longan in southern Guangxi over the years.

Key factors affecting litchi yield

1, the relative low temperature during the wintering period is beneficial to inhibit the occurrence of winter shoots.

Specific indicators:

(1) Under the premise of not being damaged by freezing, the high-yield year is when the average daily temperature in winter is lower than 10℃ and the low-temperature cold storage is between 50 120℃. Below 25℃ is the year of labor shortage.

(2) Under the premise of not being damaged by freezing, it is a high-yield year when the average daily temperature in winter is below 10℃ and the highest low temperature is between 4072℃; Below 20℃ is the year of labor shortage.

(3) When the extreme minimum temperature in winter is 0.52.0℃, it is mostly a high-yield year; Less than or equal to -2.5℃ or greater than or equal to 4.5℃ is the year of labor shortage.

2. There are few rainy days, heavy rains and strong winds in April.

Litchi fruit trees are particularly sensitive to water and light conditions during flower bud differentiation, flowering and pollination. If there is no long-term rainy day or long-term high temperature and drought in April, the temperature is normally high and the sunshine is sufficient, which will be beneficial to the flowering and pollination of litchi fruit trees and improve the fruit setting rate. On the contrary, it is not only not conducive to the improvement of flowering, pollination and fruit setting rate of fruit trees, but also easy to cause a large number of physiological flowers and fruits. In addition, the occurrence of strong convective weather, such as hail, thunderstorm and strong wind, is also easy to cause mechanical damage to fruit ears and young fruits, leading to falling flowers and fruits. bale