Technique of promoting flowering in vitro of fresh cut flowers of Bitao

The technology of promoting blossom of fresh cut peach at high temperature is a technology that allows branches of green peach to blossom in advance in vitro and supply the market for the Spring Festival. After two years of experimental exploration, good benefits have been obtained, and the main points are introduced as follows.

Facilities require a plastic greenhouse, equipped with ventilation equipment, so that the indoor temperature and humidity can often be consistent, up and down, left and right can not be too different. The clean gravel is stable in nature and cannot be alkaline after being soaked in water for one month. The particles should not be too large. We can get fresh water in time. Clear water preheating pool. Spray moisturizing equipment. Flower branch treatment flower branch should be a little more than the length and number of flowers required by the contract buyer, leaving room for treatment in production. Immediately after collection to the greenhouse, generally do not stay overnight, to the greenhouse after the lower end cut into a horseshoe shape, a branch inserted into the flowering pool. If there is not enough manpower, you can first integrate the flower branches into bundles and insert them into clear water, and then cut and insert as you go. Care should be taken during the whole process from picking the tree to inserting it into the flowering pool to avoid shedding too many flower buds.

The technical requirements are to build a flowering pool in the greenhouse and cover it with gravel. The pool should have better water retention, but it does not have to be controlled too much, it is better to have a little leakage. Cut the flower branch to the desired length and insert it into the gravel according to 2 to 4 square centimeters per branch, with the depth of the flower branch not falling down. The gravel should be washed and moist before insertion, with a little water in the lower layer. After being plugged in, after a week's preheating period, the indoor temperature gradually rises to about 25 ℃ during the day, the highest is not more than 30 ℃, the night is about 15 ℃, and the lowest is not more than 10 ℃. Keep this temperature for 15 to 20 days to form flowers. During this period, keep the temperature not too low at night; when the sun comes out during the day, you should always be vigilant that the temperature rises too high and the humidity is too low, causing buds and branches to dry up. Regular ventilation and cooling, spray moisturizing, so that the air humidity is generally not less than 40%; the air temperature is not much different, so as to avoid uneven flowering. The gravel in the flowering pond should be kept moist at all times and preheated water should be added when dry. In order to blossom ahead of time and blossom neatly, gibberellin solution can be sprayed in the first week to break its dormancy quickly. in the middle and later stage, one or more kinds of dilatonin, dwarftin, promethamine and paclobutrazol can be poured into the flowering pond. when pouring, it should be able to evenly wet gravel. During the flowering period, micro-fertilizer potassium dihydrogen, potassium nitrate, ammonium nitrate and sugars can also be added, but after adding sugar, 8-hydroxyquinoline citrate should be used to sterilize, and other fungicides can also be used. the choices are 2000 times of Sukeling, 1000 times of methyl topzine, 1000 times of alum, 1000 times of bacilli, 1000 times of Ruiduomi and 1000 times of thiram. These agents have been proved to have no side effects on flowering itself.

The accumulated temperature of flower bud germination, dew red, bud formation and flowering time of Bitao were 229.3 ℃, 286 ℃, 306.75 ℃ and 494.25 ℃ respectively. The accumulated temperature of Wushi peach is 516.5 ℃ at the first flowering and 584.5 ℃ at full flowering stage. The accumulated temperature of purple leaf peach was 424.5 ℃ at first flowering and 584.5 ℃ at full flowering stage. Note: 1. The matrix gravel must be clean and must not be alkaline after dissolving in water, so it is best to use siliceous ones and less calcareous ones. The size of the particles should be the size of beans, not sand. two。 The temperature during the day should not be higher than 30 ℃ for a long time, otherwise it will inevitably cause too low humidity and easily cause flowers and branches to dry up, so we should pay close attention to it. Don't be less than 10 ℃ at night. 3. Flower branch density can not be large, air closure will make the leaf bud growth too fast, affecting the flower bud growth. 4. In the first week after entering the house, the temperature should not be raised too high and too fast. 5. Use water to draw fresh water, and there shall be no pollution. Distilled water can not be used, the latter is not good.