Ginkgo biloba "four suitable" pollination results

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Timely observation is timely. Observe the development of female and male trees. Ginkgo is divided into dioecious plants, and "bisexual" flowers are mature according to changes in temperature. Males take the lead and females spend their lives. The "bisexual" flowering period is not met in ten years. Therefore, it is necessary to artificial pollination in order to improve the seed setting rate of Ginkgo biloba. Before the artificial pollination is performed, the male and female "inflorescences" and "flowers" must be carefully observed. The male inflorescence is generally seen in early April. The ear is cyan in color, and it is scaly. After that, it grows into a panicle and spike flower that is about 2 cm long. After the middle and first mature, after the top mature. After the mature oocysts open, pollen drifts with the wind. The "female" inflorescence is smaller, the stigma is angular, and the stem is about 1 to 1.2 cm long. When it emerges from the shoot, the inflorescence is smaller. As the temperature rises, the stigma and the stalk gradually grow and grow to a certain time. The stigma tipped out "sexual water". "Sexual water" is more obvious in the morning, and the general "sexual water" lasts 7 to 10 days. By observing the development of dioecious and dichotomous processes, artificial pollination should be done timely. Appropriate picking is timely picking. Picking "male", the male inflorescence from the order to mature, generally 15 to 20 days, if the temperature is high, the male flower sac opening in 15 to 18 days, anthers that can drift with the wind. The inflorescences are picked at the right time according to the color of the panicles. Generally, the ear is full, yellow-green, and the egg is used for crushing and powdery for picking. After harvesting, pollen is elicited, and artificial pollination is performed when the "male" inflorescence has "sexual water". Appropriate authorization is timely pollination. Pollination, according to a certain ratio of water, pollen, and add adhesives, reminders Huawang, Zhizuo Ling and other plant regulators mix, and with the spray, avoid pollen in the water for too long and lose vitality. When the powder is sprayed, "do not use four" or "three do not spray." "Four no use": no dirty water, no standing water, no tap water (with bleaching powder), no red powder sprayer. Use live water, clean water in the river and a special duster to spray the powder. “Three Noes”: Do not spray when there is dew in the morning or in the evening, do not spray in the rain, and do not spray in the windy day. Six hours after spraying, it rains again. The right amount is the right amount of powder. With the number of flowers, it can control the occurrence of large-scale phenomena. It is generally necessary to master "more than four more." That is, strong tree vigor and pollen amount should be used; tree vigor should be weak, and pollen amount should be less; trees with less inflorescences should be used, and flowers should be used more; inflorescences should be more, flowers should be used less, and young trees should use more flowers. Older trees use less flowers; trees bearing young trees use more flowers, and fewer flowers are used in the year of fruiting. In short, it is necessary to adapt to the conditions of trees, because of the amount of flowers, scientifically do a good job of artificial pollination, to avoid the occurrence of large and small phenomena.

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