How to Ginkgo artificial pollination

Ginkgo biloba, also known as ginkgo, is famous for its dried fruit. "Ginkgo" is rich in nutrients, in addition to starch, protein, fat, carbohydrates, but also contains vitamin C, riboflavin, carotene, calcium, phosphorus, potassium, magnesium and other trace elements, and other ingredients. It has benefits of lung qi, relieving cough, stopping (white) turbidity, reducing diarrhea, flattening wrinkles, expanding microvessels, increasing blood flow, medical effects, and therapeutic effects. Ginkgo biloba is a dioecious plant. There are many phenomena in this area. The trees and perennial grafted trees in decades have only bloomed without result. This is mainly due to the lack of pollination by male flowers. Even where there are male trees, female flowers mature 2-3 days later than the male flowering stage, and male flowers have a short maturation period and fast powder. They are often affected by rain, wind, and wind. Such as the impact of pollination, resulting in ginkgo fruit tree fruit production rarely or even no results. Therefore, in order to give full play to the results of ginkgo application ability and promote high yield, Ginkgo must be artificially assisted pollination. The methods are as follows: I. Identification of male and female plants (1) Female plants of the same age are dwarf, but stems are thicker; female plants germinate later than male plants, and defoliation is earlier than male plants; (b) Female plants are more than male plants. Small and serrated short; (three) female main branch and main stem angle up to 50 degrees, to the Quartet transverse development; male main branch and main stem included angle is about 30 degrees, straight up vertical, strong and powerful; ( (4) Female trees have early crown formation, irregular branch distribution, and large lower branches. The canopy is generally oval-ovoid. Male trees form the crown late, branches are evenly distributed, the layers are clear, and most of the crowns are tower-shaped; Female flower buds are lean and slightly pointed, male flower buds are large and plump, and the top is slightly flat. (6) Female flowers grow at the top of the pedicels and are divided into two forks with two flowers on top, like matchsticks. Second, male flowers are collected. It is generally mature on April 15 in this city. Male flowers are immature green and resemble mulberries. Since the male flower of Ginkgo biloba matures, the pollen period is only about one day after the pollen matures. If it is not grasped in time and collected in due time, it will be scattered and empty, leading to male pollen-free pollination, but not pollination; but collection is premature and the pollen is immature. Poor sperm viability or lack of vitality affects pollination quality. When the male flower was collected for the appropriate period, when the pollen sac in the middle of the flower cone was changed from green to yellow, the hand pollen had pale yellow pollen, which was the best picking period. However, it should be noted that because the male flower meets the weather well and the temperature is high, it will be opened early. When the weather is cold and rainy, it will be opened later. Therefore, it is generally necessary to observe the male flower inflorescence changes within one week before and after the rain and find that the ripening is immediately and timely. Male flowers collected must not be packed in opaque plastic bags and should be packed in ventilated cloth so as to avoid heating and deterioration of the inflorescence and affect pollen viability. Third, the pollination time The city is generally 2-3 days before and after the rain valley for the best period of ginkgo pollination, the specific time and temperature depending on the weather, ginkgo pollination this year the best period in April 18 - 20 days. When the ovule of the female flower matures, the liquid secreted by the pollination chamber also increases. The ovule has a phenomenon of water spewing outside the orifice (commonly known as water). The diameter of the water droplet outside the orifice is larger than the opening degree of the orifice and becomes a full round of water droplets. That is, when the ovules are fully mature, pollination is started at this time, and the pollination is optimal in these five days (that is, timely pollination when the pistil stigma sees water droplets). Pollination should be selected on a sunny day, after the dew has dried. If pollen is no longer spiting “sexual water” on the second day after pollination, it means that pollination has been completed. Otherwise, pollination should be performed on the next day. V. Pollination amount and pollination method When pollinating, we must strive to achieve even, full, and appropriate amount of canopy up and down, inside and outside. In general, less flowering trees pollinate less pollinated trees pollinate; saplings, aging trees less pollination, young trees, Wangling trees more pollination; poor fertilizer and water management, weak tree pollination, adequate fertilizer, trees Strong pollination. The trees that are generally more than 30 years old will produce 50 kilograms, only 5 grams of pollen, and 5-7 years old will graft 3-5 trees, only 1 gram of pollen. There are many methods of pollination, but the most economical and effective method is spraying. Add water to the pollen (note that the water used should be clean; generally 1 gram of pollen plus 0.5 kg of water, preferably 0.5% sugar), stir well, filter the slag shell with a cloth, and pour into the sprayer (note that the sprayer used must be repeated Rinse clean, non-toxic, alkali-free and pesticide-free to prevent death from pollen. The pollen must be sprayed with the spray. Do not spray the pollen for a long time before it is sprayed. This is because the pollen in the water easily swells and breaks. Sixth, pay attention to the point of artificial pollination First, the choice of pollen is better in the sunny days, cloudy or rainy days collection should be spread out in time to prevent heat failure. The second is that the baking time after pollen baking is too long should be placed in a container with lime to prevent deterioration by moisture. Third, the spray should be sprayed in time after pollen watering, in order to prevent the pollen from swelling due to water swelling and failure. Fourth, the sprayer should be washed to prevent the death of pollen polluted by pesticides. Fifth, the spray should be comprehensive and thoughtful. Sixth, the amount of pollination should not be less, to prevent man-made size.

[Composition]

The main component of this preparation is human immunoglobulin, which is prepared by cold ethanol fractionation of human plasma from healthy donors. The manufacturing process contains a step to remove anticomplementary activity and a dual viral inactivation process. It contains a suitable amount of glucose or maltose as stabilizer (see table below), but does not contain any antiseptic or antibiotic. The distribution of IgG subclasses is close to the serum level of normal subjects and maintains the bioactivity of Fc fragment of IgG.

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