Key Techniques for Increasing Fruit Setting Rate in Greenhouse Peach

How to increase the fruit setting rate in greenhouse peach production is the key to ensure high yield and increase income. For the fruit growers, they should focus on five key issues such as temperature, humidity, fertilizer, water thinning, and pollination. If problems arise in the management of these links, they will often cause great losses. Therefore, fruit growers should pay enough attention to the production process.

1. Temperature Management Heat management is performed from mid-December to early January. At the beginning, the grasshopper can be uncovered by one-third. After three days, it will be uncovered by one-half. After six days, it will be uncovered. After sunset, it will be covered with insulation. If the temperature rises too fast and the temperature is too high, the peach sprouts quickly and there is often a reverse order phenomenon of "flowers after the first leaves." Mr. Ye Xichang competed for tree storage nutrients, resulting in malnutrition of flowers, so that flowers did not open before the decline, resulting in reduced fruit setting rate. Some of them are too slow to warm up and the temperature is too low, delaying the flowering time, postponing the maturity period and reducing the economic benefits. The temperature control should master the following standards: the first 10 days during daytime control at 13-15°C, nighttime at 2-4°C; the second 10 days at daytime at 16-20°C, nighttime at 3-5°C; the third 10 days Daytime control at 18-20°C, nighttime 4-6°C; 4th day before flowering, 20-24°C during daytime, 5-7°C at night, 19-21°C during daylight flowering, 6-8°C at night; Flowering during the day 21-23 °C, 8-100C at night; during the flowering period 24-26 °C, 8-10 °C at night.

2. Humidity management Before the flower sprouts after warming, the relative humidity of the air is controlled at 80%. After the buds germinate and before flowering, the relative humidity of the air is controlled at 60%-70%. At the flowering stage, the relative humidity of the air is controlled at 50%-60%. Especially when flowering, too much or too little humidity is unfavorable for pollination, and when the humidity is high, gray mold and flower rot become popular. In order to prevent excessive humidity, black plastic film may be laid after the second irrigation. If the humidity is lower than 50%, water can be sprayed on the ground to increase the humidity for pollination. In order to accurately grasp the relative humidity, the fruit grower can prepare a relative humidity table.

3. Fertilizer management After 5 days of warming, the top dressing is combined with irrigation for 5 days. 0.2 kg of compound fertilizer is applied to each plant, and the temperature is increased for 20 to 25 days before irrigation. After the second irrigation, when the soil is slightly dry, cover the black mulch between the lines to increase the ground temperature and reduce the air humidity.

4. Thinning of flowers Due to the use of chemical control techniques in the early stage of flower bud differentiation, generally more flowers are produced. When the flowers are sparse, the buds at the base and top of the result branches can be removed. The double flowers on the back buds and back buds are only Leave a bud. Sparse flower buds or sparsely flowered flowers are often unattainable for many fruit growers. They fear that they cannot bear fruit. This results in the opening of a large number of flower buds, and the excessive consumption of nutrients has affected fruit growth and fruit growth.

5. Pollination For complete flowering and self-cultivation varieties, pollen need not be collected. Just use a simple pollinator to align the flower's heart, or use a feather duster to roll it over the flower several times. Pollination is suitable from 9:00 am to 3:00 pm. For pollen-free varieties, artificial pollination must be carried out. In the first 2-3 days before pollination, the buds to be planted are collected, the calyx is torn, and the anthers or two flowers are rubbed with a small forceps to remove the debris and the anthers are removed. Dilution layer on paper, temperature maintained at 20-25°C, air wet building maintained at 50%-70%, anthers cracked after 24-48 hours, pollen was dispersed, pollen and anther were collected and placed in dry vials Keep away from light. Pollination can be used point method, pollination can not only improve the fruit setting rate, but also promote the development of the fruit, increase fruit, increase production.

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