High-yield cultivation techniques of black corn
Black corn has a good taste and high nutrition. It can be eaten with food, and can be fresh and cold-storage. It is known as the emerging “fruit†and “crop vegetablesâ€. Black corn can be sown in spring and summer, and its specific high-yield cultivation techniques are as follows: First, land preparation and land preparation Although the root system of black corn is developed, the adaptability is strong, and the type of soil is not high. However, the production period of black corn is long, the amount of fertilizer needs to be large, and the water and nutrients to be extracted from the soil are large. Therefore, the terrain should be flat and soiled. Fields with thicker layers, loose soil, medium fertility, and good water retention and fertility are planted. The sowing field must be deep ploughed, the soil should be soft, the water should be stored, and the soil should be preserved to create a deep, loose, soft, uniform, fat and wet soil environment, ensuring that the seedlings are quick and tidy, reaching the seedlings, seedlings and seedlings. Requirements. Second, the selection of good varieties Any excellent variety has certain requirements for natural conditions such as temperature, humidity, sunshine, and soil and other environmental conditions. Therefore, according to the actual situation in the locality, it is necessary to select varieties according to local conditions and use scientific cultivation methods to exert the potential for yield improvement of improved varieties. At present, black corn varieties commonly used in production include Italian black corn, Peruvian black corn, Korean purple gold black corn, and black corn. Third, seed treatment Seed treatment before sowing. Select seeds, remove mold, broken grains, worms, and use sun-dried seeds for 1 to 2 days, while soaking seeds and germination and seed disinfection. It can be immersed in potassium dihydrogen phosphate solution for 12h or about 50 °C to germination, and then coated with corn seed coating agent. It can also be used for seed dressing with 20% rust and rusting, which can effectively control underground pests and seedling diseases and insect pests. Fourth, isolation planting Black corn has different genetic backgrounds from common corn, special corn, waxy corn and high oil corn. It should be isolated from each other to avoid the mutual pulverization and reduce the quality and coloration of the ear. Generally, the distance between 350 and 400 m is suitable. 5. Scientific fertilization Applying the base fertilizer, the role of the base fertilizer is to fertilize the soil, improve the physical properties of the soil, loosen the soil and provide nutrients at the seedling stage in time to promote root development. Since black corn has a long growing season and requires a large amount of fertilizer, it is necessary to apply sufficient base fertilizer. Topdressing should be diligent, generally 2000kg per 667 square meters of organic fertilizer, 40 to 50kg of ternary compound fertilizer. Appropriate topdressing, the role of topdressing is to achieve the high-yield purpose of "stalking, attacking, attacking and granulating". The first top dressing is in the 6-7 leaf stage, the early stage of jointing, generally 10 to 15 kg per 667 square meters of urea, the second time Topdressing in the big bell mouth period, 20 kg of urea per 667 square meters of deep application, the third top dressing in the heading period, 15 to 20 kg per 667 square meters of compound fertilizer. Sixth, strengthen management In the seedling stage, for the seedlings that can not be mulched, artificially rupture the seedlings, and find that the seedlings and ridges should be replenished in time; in the 3~4 leaf stage, the weak seedlings and seedlings are removed, and the seedlings are fixed at 5-6 leaves. Watering in the seedling stage should be based on the principle of “do not dry or notâ€. Three to four times of cultivating should be carried out before the plants are closed. In the medium term, the combination of deep-cultivation and deep-cultivation will be carried out in the later stage. Black corn has many branching and branching characteristics. In order to ensure the ear yield and grade, the snoring should be removed as early as possible, and the main stem and leaves should be avoided as much as possible. Seven, artificial pollination Due to the high density of black corn, the leaves are shaded, the pollination is poor, and the thin-grained baldness is prone to occur. Therefore, it is necessary to manually collect pollen during the flowering period and give it to the ear, while collecting and teaching it, every day from 10:00 to 12:00, continuous. 3 to 5 days. Eight, disease prevention Black corn is mostly used for fresh food. When applying pesticides, it should be noted that pesticides with large residual amount and long residual period should never be used, and should be used 20 days before the market. Corn borer is more harmful to black corn, which not only affects the yield, but also affects the beauty of the ear and the grade of the commodity. It should be controlled by drugs. It is best to use biological agents for prevention and control. Bt milk (powder) agent is used in 150-200g per 667 square meters. Mix 10kg of sand and sprinkle it into the bell mouth during the black corn heart. When the plant height is 30cm, the surface of the sulphur-phosphorus is sprayed once, and 50g of Jinggangmycin crystal powder is sprayed on the surface of 50kg of water for 667 square meters at jointing stage to prevent and cure large-sized spot and sheath blight. 15 days apart. Nine, timely harvest For fresh consumption, it should be harvested in time after 17 to 23 days of pollination. At this time, the yield is high, the rice stick is fresh and tender, and the taste is good. The non-fresh edible leaves are loose and loose in the leaves, the seeds are hardened, the grain milk line disappears, and the stems When the black layer appears, it is harvested at the full maturity stage, and the yield is the highest. 1)High-luminance and white LED, features in long life and good stability. Urine Analyzer,Urine Analyser,At Home Water Test,Water Indicator Paper Changchun LYZ Technology Co., Ltd , https://www.lyzstrips.com
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