Key points of spraying gibberellin in watermelon and its application in watermelon production

Gibberellin is a kind of spectral plant growth regulator commonly used in agricultural production. Its physiological function is to promote cell growth and accelerate the growth and development of crops. It can also be used to induce and adjust the ratio of female and male flowers, increase the rate of fruit setting, break seed dormancy and so on. The function is quite extensive, how to use it in the agricultural production of watermelon? Let's talk about it next.

Prevention and treatment of stiff seedlings

In the first few days of watermelon planting, it is usually due to adverse factors such as low temperature or root damage. There are many factors causing rigid seedlings, such as lack of water and fertilizer and soil drought lead to the emergence of rigid seedlings in a large area. Nursery bed temperature is generally transplanted, the temperature below 15 degrees Celsius will be stiff seedlings. It is certainly not realistic to adjust the climate, and at this time you can use plant governor regulators to break the stiff seedlings. At this time, you can choose 50: 100 mg / L gibberellin solution foliar spraying seedlings, 3-5 days can be effective, although gibberellin can quickly improve the situation of rigid seedlings, but it will make the seedling cotyledon yellowing, lighter, so gibberellin can be sprayed while adding some potassium dihydrogen phosphate.

Promote the polygamous flowers of watermelon

Watermelon seedlings begin to elongate at the three-leaf stage and gradually begin to differentiate into female flowers. Generally speaking, there are few female flowers and too many male flowers in watermelon as a whole, so gibberellin can be sprayed in order to make the watermelon produce female flowers early. Dilute with 8000 times of 4% gibberellin EC and choose foliar spray.

Prevent fruit cracking

After the watermelon enters the ripening period, once the weather is overcast and rainy or the temperature changes suddenly, there will be fruit cracking in a large area. You can use:

15mg / L indoleacetic acid, 15mg / L gibberellin, 30mg / L naphthylacetic acid and 8mg / L cytokinin or its mixed solution

Spraying watermelon once a week after flowering can effectively reduce the occurrence of watermelon cracking in the later stage.

Extend the storage period

Foliar spraying with 2000-4000 times of gibberellin EC before watermelon harvest can also effectively prolong the storage life of watermelon.

Coming back to the question of whether gibberellin should be sprayed on watermelon or not, through the above analysis, we can see that no matter which purpose gibberellin is sprayed, it can be sprayed on the leaf. of course, since it is sprayed in the field, it is inevitable that the spray will fall on watermelon, which is harmless. Gibberellin is an endogenic auxin. No matter which part of the plant is absorbed, it will have the desired effect.

The above is a point of view shared by science to promote agriculture for your reference.

This article is originally created by science to develop agriculture, and will take you to grow knowledge together.