First, field management After the turnip green, we should remove the dead leaf weeds on the ground as soon as possible, smash the flat surfaces, and rake the pods so that the plant base can receive the sunlight better, raise the ground temperature, and promote the sprouting. When the soil thaws and sends out new shoots, it can chase a fecal dilute water to promote new shoots. After 3 to 4 days, cultivating loose soil once, and turning the overwintering soil into the soil. Rilling soil can increase soil temperature, promote seedling growth, and control weeds. When the seedling height is about 15 centimeters and then poured once more, it will improve the quality of the spring pot and harvest it later. Watering time and amount of watering should be determined according to the weather and soil moisture at that time. When the soil moisture is good, you can water it after collecting the first knife. After each harvest, the cultivator loosens the soil, flats the soil, and gradually cultivates the soil as the plants grow. In addition to the application of base fertilizer, leeks need to be topped with a knife, that is, top dressing 1 to 2 times after each harvest. Topdressing should be carried out 3 to 4 days after harvesting. The wounds to be harvested will heal and the new leaves will be applied when they grow. Fertilizers immediately after harvesting can easily cause fertilizer damage. Top dressing should be mainly available nitrogen fertilizer and human fecal urine, can be applied with water or ditch, fecal dilute water must be fully rot to prevent damage. For plants more than 3 years old, special management such as de-rooting and earth-cultivation is also required: removing the roots and carrying them out before the early spring amaranth sprouts. When the soil has thawed before and after the convulsions, the root soil is excavated with irons, and the depths and widths are about 6 centimeters each. The soil between the plants in each culm is discarded and reaches the root depth, exposing the rhizomes, removing the dead roots and the delicate branches. Dig out the soil and spread it between the rows, then squeeze the roots and fill it with fine soil. Earth-cultivation: Earth should be thawed in early spring and sprouts before germination; the thickness of earth is determined by the height of the root-dipping, generally 3 to 4 cm per year. Fine soil requires good physical and fertile soil, and it is used after being sieved and stored in a sunny place. Second, the pest leek pestle: spring irrigation can add pesticide poisoning, in late April is the emergence of adult eclosion can be killed 600 times killing; in early May can be used 40% of omethoate 800 times Irrigation root control. Earthworms and earthworms: In the 3rd, 4th, and 5th month of the season, they can be used as a poison bait. They can use 90% trichlorfon, 150g 30x liquid, and stir in 5 kg of sauteed wheat bran or bean cake. Sprinkle into a daytime or plan a bowl of large pits every 3 to 4 meters in the field, put the poison bait into the soil, and shave one row every 2 meters to trap and kill. Third, amaranth chemical weeding new root amaranth weeds before buds. With 33% weeding through the EC, 100 ~ 150 ml per mu of water spray, the validity period of 45 to 50 days, with 48% dimethoamine EC 200 ml per mu, after the application of shallow cultivator to mix the drug and soil, valid for 30 days. 50% Ligulon WP, or 25% fennel EC can be used for 750-1000 ml per acre when grass sprouts occur after germination. Old root leeks have strong resistance to the drug. Healing wounds after each cut of leeks can use 48% trifluralin EC 100-150 ml/mu, or 50% Praxanthine WP 100-150 g, 33% weeding through EC 100-200 ml, 25% 500% herbicide emulsifiable concentrate, 48% diammonium EC 200 ml per mu, 50% herbicide No. 1 WP 150 g per mu. The above-mentioned chemical agents, optionally one kind, may be sprayed on the soil, or may be sprayed with 20% of herbicidal ether microgranules 1.25 to 1.5 kilograms of finely ground soil 20 to 30 kilograms, which also has a good control effect.
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