What should I do if the peppers are floating and seedlings are poor? Four measures to increase emergence rate
In recent years, as a new technology, pepper floating seedlings have emerged in many planting areas. Although this method has unique effects, it has problems such as low emergence rate and poor seedling growth, which has a great impact on the cultivation of pepper and the yield of pepper farmers. Understand how to solve the problem of floating seedling emergence?
First, let's take a look at the principle of floating seedlings of pepper. Floating seedlings are used to spot the pepper seeds in a foam tray containing the seedling substrate, floating the trays on the water surface, and growing the pepper seedlings in the seedling substrate, from the substrate and water. A method of seedlings that absorbs water and nutrients in the bed. So where is the problem? Let's explore:
First, what are the reasons for the poor emergence of floating seedlings?
1, the seedbed temperature is too low
Early market price of peppers is better, so in order to promote the morning market of peppers, some farmers planted in advance time, affected by the low temperature weather conditions in early spring, but did not adopt temperature increase measures, resulting in low seedling bed temperature in the nursery shed, seeds are difficult to sprout, The emergence rate is greatly reduced.
2, the humidity is too high
Before the seed germination, the pool in the nursery shed has a deep water storage depth. If the humidity is too large, the greenhouse is not treated in time, resulting in high humidity of the seedling substrate soil, causing the seeds to breathe difficult, resulting in rotten seeds and unable to emerge.
3, pathogen infection
In most floating growers, most growers tend to neglect the disinfection of materials and environments involved in seedlings such as ponds, substrate soils, and seedling trays, resulting in the growth of multiple pathogens, directly infecting ungerminated seeds and Seedlings after unearthing cause diseases such as seed rot or seedling infections such as blight and stagnation.
4. Insufficient supply of nutrients
The seeds in the plugs sprout out to grow the first true leaves. During this period, the nutrients are mainly supplied by the organic nutrients stored by the embryos themselves. After the true leaves begin to appear, the nutrients needed for the continuous growth of the seedlings should be from the substrate or the surrounding environment. Obtaining, at this time, insufficient nutrients in the substrate or pool will cause the seedlings to yellow and grow weak and thus infect the disease.
Second, improve the management points of floating seedling emergence rate
1, reasonable temperature control
The optimum temperature for germination of pepper seeds is 25-30 ° C. It is not easy to germinate below 15 ° C. Above 30 ° C will seriously affect the emergence of pepper seedlings and normal growth of seedlings. The optimum temperature after emergence is 25-30 °C during the day and 15-18 °C during the night. The seedlings are not resistant to low temperature, so pay attention to cold protection.
Therefore, the temperature must be ensured in the nursery shed. If the temperature is too high, the membrane should be uncovered or the ventilator should be cooled down. In the low temperature period, the greenhouse film can be added in the greenhouse to increase the temperature and protect the seedlings.
2, open the shed in a timely manner
When the humidity in the floating nursery bed is too high, the ash can be sown. The amount of water before emergence should be determined according to the soil moisture of the substrate. See dry and wet; after watering, moderate water should be controlled to reduce the amount of watering. Otherwise, excessive humidity may cause stagnation, blight and gray mold. Open the shed to remove moisture and increase the light to facilitate the normal growth of the seedlings.
3, do a good job of disease prevention and control
Adhere to the principle of prevention, control of disease conditions, and reduce the number of pathogens. In order to avoid pollution and reduce the source of the disease, the seedlings must be disinfected before planting, and the seedlings can be selected by spraying the seedlings. The bottom of the nursery pond, film, water source, etc. should be disinfected to ensure clean water and shed film inside and outside. In addition, before the floating plate is put into the pool, 0.025% copper sulfate can be dissolved in warm water and added to the seedling pond to prevent the production of green algae in the pool.
4, suitable fertilizer, cultivate strong seedlings
After 80% of the seedlings in the seedling bed grow out of 1-2 true leaves, the whole plant can be sprayed with the plant growth regulator to promote the development of the root system, improve the nutrient absorption and utilization rate, enhance the photosynthesis of the leaves, and cultivate the strong seedlings.
Appropriate fertilizer, seedbed top dressing should be carried out in small quantities, and the application of seedlings and seedlings can be applied to the seedling pond. In addition, about 10 days before transplanting the seedlings, the leaves are sprayed with Youfeng+amino acid foliar fertilizer to water, and the nutrient seedlings are mixed in time.
The floating seedlings of peppers are not terrible. The most important thing is to find out the reasons. Finding ways to solve them can improve the emergence rate and cultivate strong pepper seedlings.
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