Field management measures for tomato planting

The temperature is very low in winter. How to better adjust the management of tomato fields? Let's talk about it below:

Application of growth hormone to protect flowers and fruits

Tomato fruit drop often occurs in greenhouses, which is a very important and difficult problem to solve in production. It is mainly caused by environmental reasons. Too high or too low temperature, insufficient light, lack of water, insufficient organic nutrition, etc. can all cause fruit drop. When the night temperature is lower than 15℃ during the seedling stage, the flower buds are poorly divided, which can also cause flower drop and fruit deformity. When tomatoes are cultivated under cover, the plants grow vigorously in the early stage, making it easier for flowers and fruits to drop. Applying growth hormones such as tomato spirit to preserve fruit and increase production is one of the feasible measures in cultivation. For leggy seedlings with dense branches and leaves, dwarfing or potassium dihydrogen phosphate can be sprayed to inhibit growth and promote fruit setting.

When using the high-yield agent No. 2, you should try to concentrate it moderately in each ear of flowers as much as possible, and do not apply it one by one. For flower buds that are too small or too large, you can not apply it. You can also pinch off the first flower in each ear, or immediately soak the inflorescence with about 3 flowers in bloom with 30ppm of tomato spirit. If necessary, pinch the tops early, and generally all the flowers and fruits will be set after 5 days. After the fruits are set, the nutritional growth can be regulated, and the enlarged leaves will also make the set fruits grow larger and obtain a high yield. It is particularly important to note that this variety is sensitive to hormones, and the concentration must not be increased without authorization. It is best to use two-thirds of the concentration recommended in the instructions. It is recommended to add 0.5% of cyproconazole to the hormone to prevent gray mold.

Plant adjustment

The vines are hung when the first sequence of flowers bloom. Pruning and branch cutting are carried out at the same time. Single-trunk pruning is used, and all side branches are removed to facilitate ventilation and light transmission and reduce unnecessary consumption of nutrients. The main trunk is topped when there are 5 to 7 bunches of fruits, and 4 fruits are left in each bunch. When the harvest is about to be completed, a side branch is cultivated to continue growing and bearing fruit, and the old leaves on the lower part of the main trunk are removed. The stems and vines are placed downward, and the side branches are topped with 2-3 bunches of fruits. The side branches are then cultivated again to continue growing and bearing fruit, and so on. However, it should be noted that, first, only one side branch can be left at a time, and second, the side branches cannot be left too early, so as not to affect the expansion of the fruit.

Timely thinning of flowers and fruits

The "Bei Ying" tomato we introduced before has many flowers and is easy to set fruit. Each inflorescence usually has more than a dozen flowers and sets more than 6 fruits. In production, it is generally required to keep 3-4 fruits in the first inflorescence, 4-5 in the second inflorescence, and about 5-6 in other inflorescences. The excess flowers and fruits are removed in time to promote uniform fruit growth and increase the commercial rate.

Water and fertilizer management

"Bei Ying" tomatoes are sensitive to "magnesium", so you should pay attention to the application of "magnesium" fertilizer. After watering for rooting, do not water before the first bunch of fruits are set, "squat" to promote the root system to grow downward, promote the bottom and control the top to lay a good foundation for high yield. When the first sequence of fruits is as big as walnuts, the second sequence of fruits is as big as broad beans, and the third sequence of fruits has just bloomed, stop "squatting" and start watering once every 10-15 days, and combine watering with potassium nitrate compound fertilizer 10 kg per 667 square meters each time, and 20 kg per 667 square meters each time after the fruit harvest begins. Other tomato varieties should also pay special attention to not using large amounts of water and fertilizer during the entire growth period.

Reasonable use of ethephon to accelerate ripening

The main reason for tomato fruit to ripen is the enhanced respiration and the production of ethylene. Before the beginning of spring, the temperature is low and the fruit ripens slowly. Spraying 500-1000ppm of ethephon can promote the fruit to ripen.