At present, there are many vegetable varieties that can adopt the hydroponic model. How do we cultivate the hydroponic lettuce today? Compared with the general lettuce cultivation mode, hydroponic lettuce has less pests and diseases and higher commercial value. The method of static hydroponic lettuce is the easiest to operate. Let's learn the key points together. First, the choice of nutrient solution preparation and cultivation container The cultivation vessel may be a cultivation pond or a cultivation tank. For home cultivation, you can choose pots, pots, etc., without leaking. The nutrient solution formula generally adds 350 grams of magnesium sulfate per ton of water, 150 grams of ammonium dihydrogen phosphate, 600 grams of calcium nitrate, 600 grams of potassium nitrate, and micro-fertilizer. Second, variety selection and seasonal arrangements Generally, in winter and spring, when the temperature is not high, the optimum growth temperature of lettuce is 15 to 25 degrees Celsius. If it is higher than 30 degrees, it will grow poorly. The varieties of hydroponic lettuce are generally selected from loose leaf lettuce. Third, nursery The seedling tray is made of vermiculite as the seedling substrate. Before sowing, the vermiculite is soaked with water, the seeds are evenly spread on the vermiculite, and then covered with a layer of vermiculite equivalent to twice the seed, watered, at a temperature of 20 ° C. Next, 5 to 7 days can be emerged. After emergence, the nutrient solution with an EC value (the main indicator of the water quality standard) 1.6 to 1.8 is watered. Fourth, colonization Take the foam board, make a hole every 20 cm, the hole diameter is 2.5 cm, and seal the mouth of the hydroponic container. The nutrient solution is placed in the container, and the EC value is 1.6 to 1.8. When the lettuce seedlings grow to 2 true leaves, the seedlings are planted. First, the roots of the seedlings are washed, the sponge strips are wrapped around the stem base, and the seedlings are then inserted into the foam plate holes. Keeping the stem base dry and ventilated can greatly reduce the occurrence of root disease. V. Management and harvesting The management process of hydroponic lettuce is very simple. After the planting, in order to keep the liquid level of the nutrient solution stable, the nutrient solution can be added once every 2 to 3 days, the water temperature is 20 ° C ~ 22 ° C, and the pH value is 6 ~ 6.5. When the seedlings are 3 to 4 true leaves, adjust the EC value to 1.8 to 2, and continue to add nutrient solution as appropriate, and grow into a commercial dish in about 20 to 25 days. When the family is cultivated, it can be eaten with the leaves and kept fresh. Production is generally a one-time harvest. In order to visually express the characteristics of hydroponic dishes, it is better to bring some of the white roots. In order to reduce the nitrate content in the lettuce, one week before the harvest, there is no need to supplement the nutrients, and only the water is continuously added. Sixth, pest control Hydroponic lettuce has few pests and diseases. In nutrient hydroponics, it is important to keep the nutrient solution clean, because once the root disease occurs, it will spread quickly, causing irreparable damage. In addition to disinfecting the nutrient solution, the nutrient solution should be thoroughly updated once a month. In summer, aphids, red spiders and other pests sometimes occur, and the high-efficiency and low-toxic biological pesticide, Averm, can be used for prevention and treatment. The above is all the cultivation techniques of hydroponic lettuce. Interested farmers can first collect spare food, but also want to learn the cultivation methods of other hydroponic vegetables? Then pay close attention to Huinongwang bear palm number! Head Massage,Head Massage Spa,Best Head Massager,Relaxing Head Massage Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizons.com
