Tomato hollow fruit prevention method

In recent years, tomato "open fruit" occurs at low temperatures. According to the forecast of the relevant meteorological department, this year's autumn and winter are more cold and rainy, and will be mainly wet and cold, which is extremely unfavorable for the growth of various vegetables. In particular, tomato production may have a large number of empty fruits. In order to improve the quality of tomato production, the causes and preventive measures of tomato "open fruit" are introduced as follows:

First, the cause

The direct cause of tomato "open fruit" in autumn and winter season is that the temperature is lowered due to watering in the greenhouse. At low temperature, the roots of tomatoes are cold-shrinked, the root activity is reduced, and the water absorption is poor. At this time, the young fruit of the plant is in the expansion period. In the case of short-term lack of water supply, it is prone to local fruit and less meat.

Second, preventive measures

1. Scientific operation of fertilizer water: watering greenhouse tomatoes in late autumn and winter, the water temperature must be increased by 10 °C or more in advance, and the water can be temporarily stored in the corner of the greenhouse to facilitate warming. Under the premise of ensuring normal growth, water control is the main. Before flowering, the water content maintains the degree of humidity, and the soil water content is 65-75%. In the result period, the soil should be kept moist, and the soil water content is between 75 and 85%. Generally, when the tomato grows to the size of the walnut, the watering and fertilization are started, and the application of the organic fertilizer or the compound fertilizer with the water is strictly prohibited. In the future, depending on the growth of the plant and the weather conditions, pick a tomato and pour a fertilizer.

2. Strengthen ventilation and light transmission: appropriate snoring and leaf picking in the middle and late growth period to enhance light and promote ventilation. Usually, after harvesting the fruit on the branch, the side branches located below it should be destroyed in time to ensure the nutrient supply of the fruit branch, and the leaves under the result branch are all removed. The leaves on the ears are not removed to ensure that the upper layer is well developed. If the lighting is insufficient, the lighting can be supplemented manually.

3. Strict temperature control: During the autumn and winter seasons, the temperature is controlled at 25~30°C, and the temperature at night is controlled at 15~20°C to prevent the seedlings from growing. The flowering period of tomatoes is sensitive to temperature, especially 5 days before flowering and 3 days after flowering. Below 15 °C or above 30 °C is not conducive to flowering and pollination. In the result period, the temperature is controlled at around 25 °C during the day and around 15 °C during the night.

4. Reasonable administration of hormones: When flowering results, it is necessary to increase the ability of pollination and fertilization as much as possible to form seeds , and artificial pollination can be carried out under conditions. On the day of flowering or 1 to 2 days before and after flowering, according to the temperature conditions, generally 15 to 20 mg / kg of anti-falling agent is sprayed to prevent fruit drop.