In the fruit consumption market, strawberries with large and beautiful fruit shape and beautiful red color are often favored by consumers. How to promote the expansion of fruit and increase the yield and uniform color during the strawberry planting process has become the focus of growers.

The expansion of strawberry fruit is mainly determined by the increase in the number of fruit cells (flower bud differentiation stage) and the expansion of cell volume. What are the factors that affect the expansion of strawberries? Summarize the following points:
1. Strawberry flower organs
During the strawberry flower bud differentiation stage, the number of strawberry cells is regulated, and the number and quality of flowers are improved. Secondly, to ensure the quality of flowers, strawberry flowering requires high temperature and low humidity management, the temperature is controlled at 22-25 °C, and the soil water content is controlled at 40-50%, which is conducive to fruit expansion.

Second, fruit thinning and fruit enlargement
In the process of planting, there is a saying that early fruit thinning without flower thinning, fruit thinning and depotting can reduce the "fruit setting fatigue" of plants. In the process of planting, timely removal of deformed and bad fruits is beneficial to reduce nutrient loss. Generally speaking, the necrotic picking of the first-grade top fruit is beneficial to increase the weight of the second-grade fruit.
3. Temperature and humidity management and fruit expansion
During fruit expansion period, day temperature: 20-25℃; night temperature: 5-10℃. The field water capacity is maintained at 50-60%.
(1) Low temperature, the night temperature is lower than 5°C for 3-5 days, the plant is dormant and the expansion is slow.
(2) High temperature, night temperature is higher than 10 ℃, the fruit ripens early, and the expansion is hindered.
Fourth, nutrition and regulator regulation
During the strawberry fruit expansion stage, cytokinin and brassin lactone regulators are used and potassium, calcium, boron, zinc and other elements are supplemented in time to promote strawberry expansion and sweetening, and increase fruit brightness and hardness.
Jiangxi Xinruifeng focuses on solving the difficulties in crop planting, and has carried out experiments and demonstrations on strawberry fruit expansion. The situation is as follows:
Experiment and demonstration product: New Ruifeng Strawberry Puffing Package(Mengdi + Zhaojiaguo + Ruizhaofeng)
Experiment Demonstration Variety: Hongyan
Experiment and demonstration use technology: spray the whole plant when most of strawberries begin to turn white (the fruit transverse diameter is 1.5-2.0cm).
Trial medication time: December 17, 2021 Trial return visit time: December 22, 2021
Demonstration location: Strawberry Planting Demonstration Base, Shiguan Road, Shifang City, Deyang City, Sichuan Province

On the left is the photo record before the medication on December 17, 2021, and on the right is the photo record 5 days after the medication on December 22, 2021
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Table 1 Influence of Xinruifeng Quality Improvement and Yield Increase Package on Fruit Diameter Enlargement of Strawberry

Through the effect return visit and data analysis, it can be seen that the strawberry fruit puffing effect under the new Ruifeng fruit enhancement package treatment is good, and the average fruit diameter is 3.61mm larger than that of the control treatment after 5 days of treatment; The puffed fruit is used by farmers, and the performance is more obvious on medium and small fruit. In addition, from the comparison chart before and after the test, it can be seen that the strawberries treated by Xinruifeng have large fruit size, fast color change and red color, which can promote early ripening and marketing.
Suggestion:At present, strawberry cultivation is mainly in greenhouses. As a mixed flower and fruit crop, strawberry can be picked multiple times, so it can be 10- Use 2 times in 15 days to improve the puffed fruit package. (Strawberry is affected by factors such as variety, local microclimate, and cultivation and management techniques, and the specific drug regimen should be adapted to local conditions.)
Notes:
①The strawberry fruit enhancement package needs to be used with fertilizers for better effect, and try to avoid the use of pesticides and alkaline pesticides.
②For users and areas with no experience in using the conditioner, it is recommended to test on a small area first, and then use it on a large area if the effect is good.