Management methods and technical key points for the watermelon seedling stage
Watermelon can be said to be a "national fruit." Almost everyone likes to eat watermelon, and taking a bite of chilled watermelon on a hot summer day feels really wonderful. But now watermelon is no longer only eaten in summer; with greenhouse technology, it can be eaten in every season. Growing watermelon has also become a way for many people to make money, but management during the watermelon seedling stage is very important. Today the editor will talk with everyone about management methods for the watermelon seedling stage.
1. Water management
The watermelon seedling stage is a relatively important stage in watermelon growth, and throughout the entire seedling stage the water requirement is relatively high. Watering enough before sowing can meet the seeds' water needs for germination. If water shortage occurs, then we should choose a morning on a day with good light for watering. But do not do it in the afternoon, because by the afternoon the temperature has already gradually dropped, the air is relatively humid, and watering easily causes pests and diseases. Also, after watering we should pay attention to doing all kinds of ventilation well to prevent the seedbed humidity from being too high and reducing the seedlings' resistance.
2. Ventilation management
Proper ventilation is the key to ensuring robust seedling growth, and ventilation can effectively improve the seedbed environment. After emergence, ventilation work needs to be carried out every morning when the temperature gradually rises. When the temperature begins to drop, ventilation can be ended, and when ventilating, open the vents well according to the wind direction. The specifications of the vents and the specific duration are mainly determined by factors such as the surrounding weather and wind volume. The wind volume should not be too large, and when ending ventilation, the vent soil should not be closed completely, to prevent seedling discomfort. The vents cannot remain in the same place alone for a long time, to prevent affecting the growth of the seedlings at the vent.
3. Temperature management
When the watermelon seedling grows one true leaf, it is growing at its fastest, and at this time we need to control the temperature well and appropriately lower the temperature. Prevent the phenomenon of leggy seedlings caused by too low a temperature. The daytime temperature should be controlled at around 22 degrees, and at night it should be appropriately lowered and kept at around 16 degrees. When the hypocotyl stops growing, the temperature can be appropriately raised a little, and at this time the temperature can be appropriately increased by 3-5 degrees. Seven days before the seedlings are successfully cultivated and ready for transplanting, the temperature should be appropriately lowered to strengthen the seedlings' ability to adapt to the environment. Improve the survival rate and yield of the seedlings.
4. Light management
Light is an indispensable external factor for every crop, and watermelon is the same, because watermelon cannot carry out photosynthesis without light. If during the seedling stage there is not enough light duration and intensity, it is very unfavorable to seedling growth, and the seedlings will be listless during the seedling stage, or even die. So we must control the light of the seedbed well. Because everyone generally spreads a layer of straw on the seedbed to preserve fertilizer and water, when the sun comes out the straw should be lifted promptly to increase the seedlings' light duration.
The above is a brief introduction to management methods for the watermelon seedling stage. Everyone also needs to note that in rainy weather the straw should also be appropriately lifted; do not ignore it just because there is no sun. Because even due to the weather there will still be some scattered light, and scattered light can also enable the seedlings to carry out photosynthesis effectively. That is all for today's introduction. This article is for reference only, and I hope it is helpful to everyone.