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The low temperature or late frost in early spring is an external factor that causes apricots to fail. Apricot sprouts and blossoms earlier, and the flowering period lasts from late March to early April, which coincides with the occurrence of early spring and late frost. The apricot tree flower and young fruit are sensitive to the low temperature of the night cream. If the frost is easily pollinated and fertilized, it will cause flowering and fruit setting. In case of low temperature, rainy weather or windy weather, it will also adversely affect the spread of pollen and affect the bees and other insects. Activities to reduce apricot flower pollination opportunities.
Artificial pollination is one of the effective measures to solve the problem of false apricot flowers. Artificial pollination should be pollinated pollen varieties and mixed pollen of main crops and pollen. Pollen should be collected during the bell period or the initial flowering period of the flower. After the flower is collected, the two flowers are used to remove the anther. Can also be anti-flowers, then screen out the anthers, the collected anthers go after the miscellaneous flat smooth clean paper, the temperature is maintained at 20-25 °C temperature maintained in 60% 80% of the indoor, overheating too dry will affect the anther cracking, after 24 After about one hour, the anthers are cracked, pollen is released, dried a little, collected pollen and stored in glassware, stored in dry, used as a dryer, and a paper dryer or iron tube is used. Put some quicklime on the bottom of the tube, lime on the paper (paper is loaded with pollen ), made by capping.
Second, from the early flowering period to the late flowering period, pollination twice, and flowering only for 1-3 blossoming flowers in the center of the inflorescence. When the flower is low, all newly opened flowers must be pollinated. When pollinating, the pollen is placed in a glass bottle ( Not too much). Use hand, pen, hair or paper to take pollen, apply lightly to the stigma of the pollinated flower, and pollinate the pollen once to pollinate 4 to 5 flowers. Determine the number of flowers pollinated by each tree according to age, tree potential, and management status. Quantity, flowering trees with poor fertilizer and water conditions, pollinating flowers may be less, on the contrary, may be more, pollen remaining after each pollination, pour it out through the ventilation and drying (without heating), then use glass bottles (sticks) in the glass The plate is crushed into powder and can be reused once. The best time for apricot flower pollination is about half an hour after flowering. At this time, the fruit setting rate of pollination can be as high as 86.42%. Pollination within 48 hours after flowering also has a certain fruit setting rate.
In order to solve the apricot flower natural pollination ability can also take the following methods.
The main cultivars should choose varieties with low rate of abortive flowering and natural pollination and fruit setting rate; varieties with good affinity for the main cultivars, consistent flowering period, large amount of pollen, and high pollen germination rate, (such as string and branch red) Pollination tree. In addition, irrigation in early spring, late apricot tree blossoms to avoid the hazard of late frost; smoke anti-frost; 1 month before flowering and flower buds before sprouting, each spray a 0.1-0.3% saline, reduce the extent of floral frost, and the apricot flower Artificial pollination can all play a role in promoting apricot pollination.
Fruit plasticity stems from flowering and fruiting, but flowering does not necessarily result. Only the pollen of stamens on the stigma of the pistil in the flowering plant undergoes insemination, the ovary enlarges and the young fruit grows and develops, but most of the apricot trees grow. There is a phenomenon of abortion of the pistil or self-incompatibility in the tadpoles, which results in inefficient flowering of the apricot trees.