Effect of Intermittent Illumination Culture on Banana Growth

Effect of Intermittent Illumination Culture on Banana Growth

In the process of industrial tissue culture and production of banana seedlings, the room temperature is required to be maintained between 25 and 30°C, and the light intensity requirement is maintained between 1500 and 2000 lx. Among them, the room temperature is usually controlled by an air conditioner, the light source is usually provided by a fluorescent lamp, and the light and the temperature are all using clean electric energy as an energy source, and the electricity expenses become an important part of the production cost of the tissue culture industry. Of course, the progress of science and technology, has successfully developed a light incubator that can control the temperature and illuminance, light incubator fully controlled by the microcomputer, touch switches to control the various operating time, temperature, light, so sometimes known as intelligent lighting Incubator. Leizhou Peninsula is located in the transition zone between tropical and subtropical regions. The annual sunshine duration is 1 817-2106 h, the cumulative temperature is ≥10°C, and the accumulated temperature is 8 309-8 519°C. The average annual temperature is 23°C, and the hottest month (July) is the average temperature. 28.7°C, extreme high temperature 38°C, coldest month (January) average temperature 16°C, extreme low temperature 5°C, sufficient photothermal resources. In the spring, summer, autumn and Mengdong periods of each year, the tissue culture plant uses daylight lighting to cultivate. On the one hand, the ballasts on the fluorescent lamp brackets generate a lot of heat. On the other hand, the air conditioner cooling is used to reduce the indoor temperature, wasting a lot of Electric energy.

In the process of banana tissue culture, there are certain differences in the morphology between the intermittent light culture and the continuous light culture materials, and each has advantages and disadvantages. In the differentiation phase, the light cultured materials had high proliferation rate but weak buds. Continuous light culture materials had low proliferation rate but were robust. In the rooting stage, the rooting shoots were not weak in the intermittent light culture before being used in the outdoor cultivation. The rooting shoots in the continuous light culture were relatively strong, but the rooting shoots in the intermittent light culture were moved to the outdoor hardening seedlings and finally cultivated into commercial banana seedlings. The morphology was normal. There was no significant difference from commercial seedlings that had been continuously lighted. During the production of banana tissue culture seedlings, we are trying to rapidly multiply and produce more qualified seedlings while trying to control production costs. Sunlight lighting has a large area of ​​illumination, occupies less space for cultivation, is easy to maintain, and is easy to control. It is currently the most commonly used culturing light source for plant tissue culture. However, the light and heat in Zhanjiang area is sufficient, and the heat of the fluorescent lamp is relatively large. When the temperature of the culture room is too high, the use of air-conditioning cooling is also required to reduce the temperature, and the internal consumption causes an increase in the cost. In fact, the illumination time of the fluorescent lamp in the tissue culture process of the banana can be appropriately reduced, not only reducing the production cost, but also facilitating proliferation. The light box can provide the intermittent light mentioned above. At this time, as long as you set the time of day and night separately, you can get intermittent light. In this way, on the one hand, the growth of bananas can be promoted. On the other hand, it can also save energy.