Reuse wintering fertilizer
After the asparagus harvest is completed in autumn, the overwintering fertilizer shall be reused in order to meet the needs of the growth of underground root groups. After harvesting the shoots in the fall, the yellow stems were cut off and burned out of the field. In the "Lingdong" and "Winter solstice", two over-wintering fertilizers are applied, mainly organic fertilizers, each of which uses 1000-2000 kg of soil-fertilizer, 100-200 kg of calcium, magnesium and phosphorus, and 20-30 kg of ammonium bicarbonate. Into the peanut cake, bone meal, etc., fully fermented and then applied in the ditch or acupuncture points in the side, open the ditch digging points to minimize the damage storage roots. “Establish the Spring†and then apply 1 fertilizer, mix 2-3 kg of borax or potassium dihydrogen phosphate with 20-31 kg of compound fertilizer per acre, or 50-60 kg of urea mixed with potassium chloride or earth miscellaneous fertilizer, and promote tenderness. Stems unearthed. Watering must be performed once after each fertilization and once every 6-7 days in the dry season. Clear Garden disinfection
“Big Chill†to “Lingchun†depend on the degree of yellowing of the plants on the ground. The plants were cut off successively and the stems, leaves, dead branches, weeds, etc. of the plants were thoroughly cleaned, removed from the fields and burned, and the bamboo shoots and surrounding weeds were removed and eliminated. Overwintering parasites and pathogens. In the first fertilization, the soil at the base of the plant can be properly split until after the second fertilization, usually after the beginning of the “spring†period (in which all the plant parts have been cleared off by the yellow ground), the soil is completely removed through the sunny weather. When cultivating earth, do not damage the base scale buds and remove the residual stems. After exposure to sunlight for 1-2 days, use 3 kg of insecticide to spread the whole garden per acre, or spray 40% of asparagus 600 times. Soil and roots can eliminate the pathogens that cause overwintering, reduce the number of pathogens, reduce the occurrence and prevalence of diseases in the coming year, and then cover 5-6 cm thick sand. Acidic bamboo shoots can be sprayed with 50-75 kg of lime per acre to neutralize the acidity of the soil. Ditch to prevent stains.
The root of asparagus is a fleshy root. If the soil contains too much water, it is prone to frost damage or root rot in winter, which affects both the yield of asparagus and the quality of asparagus. Therefore, it is necessary to clear the ditch in time and reduce the groundwater level to prevent the occurrence of waterlogging and root rot. Prevent pests and diseases.
The main diseases and pests during asparagus wintering are stem blight, aphids, and ground tigers. The measures for preventing and treating stem blight are: cleaning ditches, lowering the groundwater level, using less nitrogen fertilizer, increasing phosphate fertilizers and miscellaneous fertilizers, and spraying them with 70% thiophanate-methyl or 50% carbendazim 600-800 times. The aphids can be sprayed with 50% phoxim EC 1000 times, or 10% imidacloprid WP 1000 times. Ground tigers can be controlled by methods such as bait, trapping and trapping or artificial capture.
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