The traditional cultivation of lotus roots is customarily used for the cultivation of carcasses, with a quantity of up to 400 kilograms per 667 square meters. If you use the apical buds of axillary as a kind of plant, it will not only save a large number of species, but also be simple and easy to use. First, nursery preparation. Choose fertile deep dry land, in the early spring every 667 square meters of pigs, 40 tons of cattle dung, phosphorus 25 kg, 15 kg of potassium, ammonium bicarbonate 25 kg or 10 kg of urea. After uniforming, make a 1.5-meter-wide, unlimited-length impotence. When the temperature rises to 12Â°C, it is cut from the buds on the carcass and is about 10 cm long. At the incision, fresh grass ash was stained and gently pressed into the ground surface with the hands, and the top of the bud was exposed. A layer of rotted, damp straw was placed on top and covered with a film to keep the membrane moist. One species can cut 7 to 8 knotted buds. Second, transplant planting. In early April, when the seedlings grow 1 to 2 true leaves and the adventitious roots emerge from the terminal bud, they can be transplanted to Daejeon. In Daejeon, first place 15 cm of water, and then plant the seedlings 1.5 cm underground. When the roots were planted, the roots were protected from injury, and planting was carried out with a row spacing of 1.5 m with a spacing of 1 m and evenly spaced. The first line of the top bud is in the same direction, and the second line is the opposite of the first line. Third, water and fertilizer management. If the temperature is low and unstable after transplanting, the irrigation surface should not exceed the surface of the leaves. After the temperature rises and gradually stabilizes, the water depth is 17 cm. May is a crucial period for the entire seedlings, with water depth of 20 cm. From June to July, the growth is vigorous and the water depth must be maintained at 20 cm. The period from late July to late August is the critical period for the scarring, and the water depth is reduced to 15 cm to regulate the temperature difference between day and night and promote the expansion of lotus root. After 10 days of transplanting, seedlings can be topped with a small amount of chemical fertilizer, using 15 kg of ammonium bicarbonate per 667 square meters, applying 10 kg of potassium fertilizer per 667 square meters in the middle period, and paying attention to the use of phosphorus and potassium fertilizer in the later period (10 kg for each 667 square meters). . Fourth, pest and disease control. Use field disinfection to prevent corruption. Brown spot is sprayed with 25% carbendazim WP 500 to 1000 times (adhesive can be added), or sprayed with 75% chlorothalonil wettable powder 600 times, or with 25% metalaxyl wettable powder 800 times liquid spray, safety interval of 15 days or more. The root rot should be selected for disease resistance and seedlings, and the onset of flood and drought rotation in Putian. The comprehensive prevention and control is adopted in the rigorous imperial battles, which includes timely replacement of crops and rotation in Putian, addition of organic fertilizers, establishment of breeding grounds for improved seed varieties, winter plowing for winter farming, or planting of green manure. Leaf spot, anthracnose and spot can be sprayed with 70% thiophanate-methyl WP 800 to 1000 times, or sprayed with 25% carbendazim WP 500 to 1000 times, with a safety interval of 15 days or more. Insect pests mainly include lobster (original shrimp), aphids, and Spodoptera litura. The lobsters were sprayed with 20% extinguishing cream 1500 times before planting, and the rice food rooted insects could be used for biological control in the field, such as loach, locust and so on. The locusts were sprayed with 40% dimethoate emulsion 800 times and the safety interval was more than 7 days. The Spodoptera litura employs artificial killing of egg masses and larvae, and measures such as sex pheromone, black light, or sweet and sour liquid to trap and kill adult insects; it can also be used in combination with field spraying control, such as spraying 4000 to 6000 times of 40% fenvalerate EC. , Or spray with 4.5% highly effective anti-cypermethrin EC 3000 times, safety intervals are 15 days.
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