Lettuce is rich in vitamins and minerals, lettuce roots are shallow, leaf area is large, drought is not tolerated, soil permeability is required, and organic matter is abundant. Lettuce is a semi-cold vegetable, hi cool and humid climate conditions, not resistant to heat, day and night temperature requirements for the ball significantly, practice has proved that the daily temperature of more than 25 °C in summer will significantly reduce the germination rate. Summer use of shade measures can avoid high temperature sunburn and cooling, so as not to convulsate lettuce, so that the market's annual supply. Expert of microbial fertilizer Jinbao summed up the high altitude summer lettuce sunshade cultivation techniques make the following recommendations:
1. Summer lettuce seedbeds are prepared for high temperatures in the summer and use open field nursery. Choose fertile sandy loam soil and deepen the soil for a week to prevent the growth of pathogenic bacteria. For each square meter, 15 kg of farmyard manure and 1 kg of potassium dihydrogen phosphate should be applied. The fertilizer should be fully mixed with the soil, finely leveled, and made to a width of 1 meter. The length should be determined according to the area of ​​the field and suitable operation. Organic manure does not have decomposed organic fertilizers, such as human and animal manure, and is riddled with pathogenic substances such as germs and eggs. These substances can seriously contaminate tea plants and prevent organic tea from being produced. At present, there are three kinds of pretreatment methods for organic fertilizers, including physical methods such as high-temperature treatment. Such methods have a large loss of nutrients and high cost; if chemical methods are used to remove harmful eggs, chemical residues do not conform to organic foods. The production standard. Therefore, the only way to produce organic fertilizers in organic tea gardens is through organic fertilizers such as organic fertilizers. Bio-fermentation agents such as Golden Dolphin have organic fermentation agents that can fully ferment livestock waste, straw and other wastes into organic fertilizers, complete fermentation, no burning seedlings, no odor, and economical use.
2. Summer lettuce seed treatment with 1% permanganic acid immersed for 20-25 minutes, after cleaning the light gills into a gauze bag, placed in a refrigerator freezer at 4-6 °C for 1 day and night, out in a cool environment The germination was carried out for 2 days and rinsed once a day with fresh water. When the seeds were white, they could be sown.
3. Summer lettuce sowing summer shade net covering cultivation in May-July sowing, 6-8 months of planting, using shade net plus old film ceiling coverage, the latest harvest in September, so that it can make up for the shortage of leafy vegetables in summer. Before the planting, the soil shall be irrigated with water to make sure that both sides of the seedbed are permeable to water. In order to make the seeding uniform, the treated seeds shall be mixed with a small amount of fine fluvo-aquic soil during the sowing, mixing, and then spread evenly, covering about half a centimeter. After sowing, the seedbed is covered by arches: Shade nets or rice straw moisturize the cooling.
4. Summer lettuce field management generally 5-7 days watering 1, the growth period needs more water, to keep the soil moist; After the formation of leaf ball, to control the water, to prevent excessive water caused by the ball and rotten heart, ball After the line is closed, the car is generally kept dry. About 10 days after the planting of the seedlings, we should carry out cultivating and weeding, increase soil permeability, promote root system development, and no longer use cultivator in the later period. The base fertilizer is the main fertilizer. When the base fertilizer is full, it may not be top-dressing in the early stage of growth, and it may be followed by 1 time of urea or ammonium sulfate. 15-20 days after the second chase, potassium phosphate compound fertilizer. When the heart begins to curl, compound fertilizer is topdressed once more. Generally based on the different varieties of early and late ripening, 40-70 days after planting, the formation of leaf ball, light pressure, there is a sense of real, you can collect, the leaf ball is too tight and easy to crack, cut from the surface when harvesting, remove the old leaves can be listed outside. For more details: Beijing Huaxia Kangyuan Technology Co., Ltd. Telephone Toll Free
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What are the benefits of microbial fertilizers? Fertilizers Fertilizers Self-made organic fertilizers
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