Planting tomatoes in greenhouses in winter and spring, when tomatoes enter the fruiting period, they also enter a critical period of management. Therefore, it is necessary to take some management measures when the tomatoes are in fruit:
The tomato is before the fruit set. Mainly based on vegetative growth, during this period, if the management measures are appropriate, it can win the initiative for the management of the middle and late period of the tomato, lay the foundation for high yield, and the main points of induction and management are as follows:
1 temperature controlled hardening seedlings as the basis
In the initial stage, the tomatoes were planted under conditions of high temperature and high humidity, combined with the use of basal fertilizer, which consumes less nutrients and can easily cause the growth of seedlings. The longevity of seedlings can bring a lot of ills, mainly due to nutritional imbalances that result in falling flowers and falling buds. Controlling seedlings after planting is an important measure to prevent leggy and prevent “three downsâ€.
2. Main measures: To strengthen ventilation and reduce temperature is the main method. Increase ventilation during the day and night, increase the air outlet at the top, and increase ventilation at the front of the shed. At the same time, the M-JFN (biological active factor) powder can be sprayed twice in 1000 times before the initial fruit stage. No matter how good the temperature control is, if you do not pay attention to the rational use of fertilizer, the seedlings will still appear prosperous. Commonly known as seedlings do not water, watering does not seedlings. Of course, at the flowering stage or early fruit stage, the water requirement of crops will be the critical period for fertilization. It is necessary to use 10 kg/mu of water for planting Shijinfu Nongken. The pruning crane must be timely, first, the pruning is not timely, to create obstacles for future management, and the plants shade each other, can easily cause field canopy; Second, the stem is easy to produce adventitious roots, further infected soil-borne diseases; Third, the lower blade easy Aging, yellowing, and rot; Fourth, it is easy to drop flowers. It is recommended that when the plant grows to about 20 cm, the vines are tied with slings. While hanging the vine, be sure to wipe off the axillary buds and vegetative branches. After the completion of the pruning, azoxystrobin (amisite) can be mixed with streptomycin for agricultural use and Ningnanmycin plus M-JFN to ensure simultaneous protection against fungal, bacterial, and viral diseases.
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