Blueberries are heat-resistant, light-loving, cold-resistant and wet-loving. It can tolerate the temperature of 40℃ in summer and the high temperature of 40 ~ 50℃ in the surrounding environment during the growing season, but it is extremely important to keep sufficient sunshine, because if the sunshine is insufficient or even insufficient, the growth of blueberry will be greatly affected, resulting in no flowering or no fruit, so suitable climatic conditions are an important factor to ensure the fruit of potted blueberry.
In summer, potted blueberries are easy to lack water under high temperature because of their shallow and underdeveloped roots. If the temperature is too high, they will burn leaves, shoots and buds. Therefore, in high temperature weather, they can be properly shaded and cooled to ensure the normal fruiting rate. In winter, potted blueberries must be dormant at a low temperature below 7.2℃ for vernalization to ensure the results in the coming year. Generally, it can be placed outdoors at 5~7℃. If they are used for flower viewing, low temperature restriction may be necessary.
Extended data
Due to the different climate and varieties, the flowering period of blueberries is obviously different. It blooms in the first half of March in the south of China, and from April to May in the north. The flowering period is generally 15~20 days, and the longest is 40 days. Flowers are planted on slender shafts to form racemes.
At the same time as the flowers bloom, the vegetative buds begin to develop into vegetative branches. Vegetative branches stop growing when they grow to a certain extent (different lengths). The last thin-pointed young leaf at the top turned black and turned into a black tip, and the "black tip" fell off after about 2 weeks. After 2-4 weeks, the vegetative buds under the black tip grow new branches, which has the advantage of the top, that is, the rotation axis of branches grows 3-5 times a year in the south.
In summer, the bud primordium next to the "black spot" on the last new shoot gradually expands and develops into a flower bud, occupying the top position. The flower buds at the top of the branches can form several flower buds, which will blossom and bear fruit in the next spring. The vegetative buds under it develop into vegetative branches, and the short branches that bear fruit gradually dry up and fall off after autumn.
Blueberries are mostly cross-pollinated plants, and high-cluster blueberries can get pregnant by self-pollination, but the pregnancy degree is obviously different among different varieties; However, rabbit-eye blueberry and dwarf blueberry are generally self-sterile, so it is necessary to consider multi-variety collocation in production to improve yield. After fertilization, the ovary of blueberry flower expands rapidly, and the growth tends to stop after about one month. After that, the berries remained green, and the volume increased only slightly.
When the berries enter the discoloration stage and coloring stage, the berries grow rapidly, which can increase the fruit diameter by 50%. After coloring, berries can grow by 20%, and the sweetness and flavor become moderate. The ripening time of fruits on the same ear is different, and the fruits at the top and middle of the ear ripen first, and the ripening time is generally from June to August.
The fruit maturity of the same variety and tree is generally about 30 days; Early-maturing blueberry varieties in southern Zhejiang began to mature in early June, and late-maturing blueberry varieties began to mature in the first half of July.
Baidu encyclopedia-blueberry
Baidu encyclopedia-blueberry