Cucumbers are dioecious plants of the same sex and, in rare cases, bisexual flowers. Generally male flowers appear earlier than female flowers, and female flowers appear to be determined by species and external conditions. The female flowers appeared in the third to fourth quarters of the early maturing varieties, while the female flowers appeared only in the eighth to tenth.
First, the characteristics of flower bud differentiation
One of the characteristics of cucumber flower bud differentiation is early maturing, and the second is the sexual type plasticity. Cucumber generally begins flower bud differentiation when the first true leaf is unfolded, but the sexual type is undecided. When the second true leaf is unfolded, the flower bud has differentiated from section 14-16, and the flower bud type has been determined from the third to the fifth section. When the seventh true leaf is unfolded, the flower buds have differentiated into 26 sections, and the sex type within section 16 has been determined. The number and position of female flowers appear to be related to the influence of environmental conditions in addition to the variety. The early flower bud differentiation is bisexual flower. Afterwards, due to the change of conditions, there is a distinction between male and female. Where conditions are favorable to the development of female flowers, stamens degenerate and develop into female flowers; where conditions are not conducive to pistil development, the pistil degenerates and develops into male flowers. It can be seen that the number of female flowering at the seedling stage has become the basis for previous production.
Second, increase the number of female flowers and reduce the female flower node measures
1. Properly reducing the night temperature to 13-15 °C is conducive to the accumulation of nutrients in the cucumber body, can significantly increase the number of female flowers and reduce the node, while the night temperature is high, the temperature difference between day and night is small, and the seedlings are leggy and conducive to the formation of male flowers. .
2. Reduce the number of sunshine hours while reducing the night temperature, increase the number of female flowers and reduce the number of nodes. Lighting of 8 hours during nursery is most beneficial to the formation of female flowers. The daily illumination of 5-6 hours is beneficial to the development of female flowers, but it is not good for cucumber growth. More than 12 hours of light favor the formation of male flowers.
3. When the soil and air humidity are 80%, it is beneficial to the formation of female flowers, too high or too low will reduce the number of female flowers.
4. Increased application of phosphorus and potassium fertilizer is conducive to the formation of female flowers.
5. The use of dry ice or multi-organic fertilizer to increase the concentration of carbon dioxide in the air is beneficial to the formation of female flowers. When the carbon dioxide concentration reaches 1%, the female flower rate is 100%.
6. After spraying the first true leaves, spraying 150-200 mg/kg ethephon can also increase the number of female flowers and reduce the female flower nodes. This has a significant effect on the cultivation of autumn cucumber, but in winter and spring, The application of seedlings in greenhouses is often not effective, and there will be no long-lasting phenomenon. This is because winter cucumbers are beneficial to the formation of female flowers at low temperatures and short days during nursery, but ethephon has the effect of inhibiting growth, so that young calluses will appear.
In short, if we want to breed more female flowers during the nursery period and make them fall in order to lay a good foundation for early maturation and high yield, we must take corresponding supporting measures in accordance with the above conditions.
Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
Plastic Spot Welding Machine, mainly suitable for automotive sound insulation cotton, mask ear straps, plastic parts and other products that need spot welding, its principle is that the generator generates pressure, and the transducer produces the same frequency of alternating current, converted from piezoelectric ceramics into mechanical vibration, and mechanical vibration produces thermal friction. Friction melts the contact point between the two parts, allowing the part to bond quickly.
Plastic Spot Welding Machine ,Ultrasonic Plastic Spot Welding Machine,Handheld Ultrasonic Plastic Spot Welder
Wuxi DIZO Ultrasonic Technology Company , https://www.dizosonic.com