Autumn lettuce is the main variety of vegetables in autumn. It has short time, low investment, quick effect and high income. It takes only 70 days from sowing to harvesting. Generally, it has a income of 1000-1200 yuan more than that of other leafy vegetables.
First, the selection of high-quality products and soaking seeds, you can use the "special heat-resistant white skin" lettuce new varieties, the leaves of the leaves are oval, the leaves are dark green, the skin is white and tender, the stems are thick, the knots are flat, the meat is light green. It is crisp and tender, has good taste and high commodity rate. It generally grows well under the condition of temperature of 12-38 °C. It is not easy to bolt out under high temperature conditions. It can be harvested after 48 days of planting, and the weight is 1-1.3 kg. Generally use 50-60 grams of seed, the best time for sowing is August 10-30, using low temperature germination, generally 15 °C or so is suitable for germination, more than 20 °C germination is slow, more than 25 °C can not directly germinate, can be added with cold water first Potassium dihydrogen phosphate 0.2% soaked for 4 hours, hoisted into the well 2-3 meters from the water surface, 24 hours to emerge, no later than 36 hours, conditions can also be placed in the refrigerator to germination.
Second, good seedlings. Choose fertile garden fields, complete the car, the width of the car is 1.2 meters, the 50-gram long 50-meter-long car surface is required for the mu, and the carton should be leveled. It is forbidden to use the lettuce to grow the seedlings. The net can be shaded by grass mats. Spraying 10 ml of water with 15 ml of proppant 7 days before transplanting to prevent lettuce from sprouting in the seedbed, the seedling age is no more than 30 days, when the lettuce seedling grows to 5-6 leaves. The seedling height can be transplanted by 20 cm.
Third, timely transplanting to strengthen the field management. Daejeon should apply enough fertilizer to the base fertilizer to 2000-2500 kg, sulfur (45%) compound fertilizer (made in Japan) 50 kg, to apply less nitrogen fertilizer, the width of the car is 2 m, the row spacing is 30 cm, the plant spacing is 25 cm, and the planting is 6000. The plant is suitable. After the autumn lettuce is transplanted, the live acre is supplemented with 30 ml of auxin, and the green Fenway 2 is sprayed with 30 kg of water. The spray is sprayed once every 7-10 days. During the conjoining period (in the initial stage of stem expansion), 15-20 kg of urea is used for topdressing in the drought-resistant period. At the same time, the lettuce is used to carry out foliar spray fertilizer to promote the accelerated expansion of autumn lettuce, and the water and fertilizer supply is stopped 10 days before harvesting to prevent Autumn lettuce cracked stems, affecting the appearance quality.
In the seedling stage, the autumn lettuce has downy mildew, and it is controlled by 6000 times of mancozeb, and the tantrum night moth is controlled by 2000-3000 times of agricultural land, and the "Hyper" is controlled by "hanging". In the late growth stage, methyl thiophanate 800-1000 times solution was used to control the bacterial disease of autumn lettuce.
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