New soilless lettuce cultivation model
At present, more than 60% of the lettuce sold in the supermarket is grown using hydroponics or aeroponics in soilless cultivation. Lettuce is very suitable for soilless cultivation mode. For planting and harvesting, lettuce is very clean without any soil, and can be directly harvested and packaged without cleaning. Today let's talk about growing lettuce.
⑴ Hydroponic lettuce
① Suitable for hydroponic lettuce facilities
To put it simply, the place where the lettuce is grown, as opposed to the soil. There are many types of soilless lettuce planting facilities seen in the greenhouse, such as the two most common floating plate planting modes and three-dimensional pipe cultivation modes. For floating board planting lettuce, it is relatively simple, that is, the lettuce is planted on the planting board and placed on the nutrient solution pool, the nutrient solution pool is not a large pool for storing nutrient solution, but a pool for floating the nutrient solution of the planting board, where the nutrient solution is recycled. Three-dimensional pipeline cultivation of lettuce, this is also to make full use of the greenhouse planting space, increase the number of planting, lettuce for light needs are relatively small, can achieve more intensive planting, in vegetables is several times the traditional soil planting.
② Problems that need attention
Here about the management of the planting process, mainly talk about some problems of hydroponic facilities. In terms of commonly used hydroponic planting tanks or hydroponic pipes, the use of harmless PVC materials is more than 10 years, in the case of no human damage. For example, the hydroponic tank, you need to pay attention to the bottom of the sediment situation, if there is a large number of impurities, indicating that some nutrients have reacted, need to be adjusted, otherwise it will cause crop malnutrition. Three-dimensional cultivation pipes need to pay attention to the pipes at the upper and lower two joints, because this is relatively thin and easy to be blocked by the lettuce's shed roots.
(2) Aeroponics lettuce
① aeroponics facilities
There are relatively few facilities for aeroponics, and the more common hydroponics facilities can not be two forms, but it is still very similar. Triangular and trapezoidal structure of the mist chamber, why say similar? The trapezoidal structure of the aeroponics box is evolved from the triangular aeroponics box, that is, the top of the triangle is cut flat, and there is more than one planting area. In the aeroponics box, lettuce is planted on several planting surfaces of the aeroponics box. When the aeroponics equipment sprays, there will be a large amount of water droplets in the entire aeroponics box, and the roots of lettuce will also get a large amount of water droplets (nutrient solution), so as to achieve the nutrients required for crop growth
Trapezoidal aeroponics lettuce facilities
② Things to pay attention to
In the entire aeroponics facility, the first thing is to ensure the tightness between the aeroponics planting plate and the installation structure, to ensure that there will be no water leakage (nutrient solution) when spraying, which will greatly consume the nutrient solution and seriously increase the planting cost. There is another point to note is the atomizing nozzle, because it is the atomizing nozzle, its spray nozzle will be very small, easy to clog. In particular, some reactions may occur between the components of various nutrient solutions to form some particles. There are many cases of atomizing nozzle blockage, and it is recommended to check it from time to time. In particular, there was a significant difference in the size of lettuce growth on the aeroponics planting board, indicating that there must be a blockage of the atomizing nozzle.
