First, the requirements of environmental conditions The whole growth process of sweet corn is completed under high temperature, short-day conditions, thus forming the biological characteristics of the warm temperature, short days. Sweet corn plants are tall, with luxuriant stems and leaves, and large leaf area. They are crops that require more water. The soil is loose, the depth of mature soil is deep, the organic matter is rich, the water retention is good, and the irrigation and drainage are convenient. The sandy loam soil with a pH of 6-7 is the ideal soil for sweet corn.
Second, the choice of varieties Fine varieties are the internal causes of increased production, selection of fine varieties is a key step to obtain good economic returns. The current high-yield and high-quality sweet corn varieties include Hon Hai Super Sweet No. 8, No. 68 and No. 18 corn. Such as the No. 8 corn characteristics are: early maturity, dwarf pole, big loquat, high quality, high yield, disease resistance, lodging resistance, high sweetness, excellent flavor, and wide adaptability. The plant height is about 180 centimeters, the ear length is 20-25 centimeters, the single ear weight is 400-750 grams, the grain is golden, the cob is fine, the grain is deep and big, the skin is thin, the sweetness is 18%. Spring planting 85 days, autumn planting about 75 days. The long cylindrical shape of the ear is similar to that of the imported American species. The integrated traits of the ear and grain are the best large-spread and high-yielding main cultivars available for promotion in Guangdong and Guangxi. Mu produce 1200 kg of fresh ear.
III. Preparation for planting in isolation Isolation planting To ensure the quality of sweet corn, normal corn and sweet corn are generally required to have a barrier area of ​​400 meters under the barrier-free condition, avoiding the production of non-sweet kernels due to different types of corn. .
The soil preparation site is about 20 cm deep, and it is used to grow sorghum, which is 12 centimeters high and 60 centimeters wide. And do field irrigation, drainage channels.
Seed treatment Seed coating is a new seed treatment technology. The seed surface is coated with a layer containing insecticides, fungicides, trace fertilizers and growth regulators as the main components and film-forming substances. The current use of Shiloy's suspension seed coating agent can generally process 20 kg of seeds per 10 ml of Shile. When used, it will dilute 150 ml of water in a 10 ml bag and pour into 10 kg of seeds after mixing. Stir quickly until evenly distributed. It has the ability to resist disease, resist insects, and promote rooting after sowing.
Fourth, the sowing method broadcast straight, plant, row spacing, consistent depth of sowing seeds, uniform seed, early maturity varieties should be dense, 60 cm and other row spacing sowing, spacing of 32 cm, seedlings 3500 per mu; late-maturing varieties should be thin, 60 Centimeter and other spacing, plant spacing 37 cm, 3000 seedlings per mu. Three to four kilograms of compound fertilizer per acre is applied to the sowing ditch or sowing hole for the seed fertilizer, covering evenly and tightly.
Fifth, fertilization method Base fertilizer application base fertilizer is an important condition for high yield of sweet corn, increase organic fertilizer, can significantly increase soil organic matter and total nitrogen, phosphorus, can significantly increase the available nitrogen, phosphorus, potassium supply in the soil. More than 1,500 kilograms of basal fertiliser per acre should be applied at the beginning of the cropping season. The application method should be adapted to local conditions and the amount of fertilizer should be adequate. The ploughing can be applied to the soil after spreading. If the fertilizer is insufficient, the fertilizer can be composted after composting and concentrated at the time of sowing. However, nitrogen fertilizer should not be too much to prevent burning. The basal application of concentrated basal fertilizer can be used economically and effectively, and it can also increase the production of fertilizers. According to the study, the application of concentrated fertilizer can increase production by 15% to 24%.
Fertilizer planted with the same seed seed fertilizer is called seed fertilizer. Fertilizer can meet the demand for nutrients at the early stage of corn growth, promote root development, grow seedlings robustly, and apply fertilizer - can increase production by 10%. The fertilization should be 5 cm away from the seed and apply acupuncture; the compound fertilizer is generally used as a seed fertilizer, 3 kg per mu. In the absence of basal fertilizer, special attention should be given to the role of seed fertilizers.
Reasonably top dressing 1 Miao Fei. If the basal deficiencies are insufficient and the quality is poor, part of the fertilizer should be applied in advance as a seedling raising fertilizer to promote seedling growth. Specific application methods: 5000 kg per mu of decomposed manure water or 1-2 kg of urea and 3 to 5 kg of potash fertilizer.
2 ear fertilizer. In the 8-9 leaves of sweet corn, the vegetative growth and reproductive growth of the plant increased, and more nitrogen, phosphorus and potassium were needed. Each mu of manure water 1000 kg or peanut bran 15 kg, can also apply urea 4-5 kg ​​or compound fertilizer 8-10 kg. Re-apply for attacking manure. Generally 7-10 days before tasselling, when the leaves of the top of the plant resemble bell-shaped shapes, nitrogen fertilizer is mainly used, applying 8 kg of urea per mu, 6 kg of potassium chloride, and 2000 kg of manure water can also be applied. The Department of 8 points 10 centimeters to open a hole fertilizer, cover soil after application.
3 Moisture management. The growth of sweet corn requires a lot of water, from the 10 days before tasseling to 20 days after tasselling. In the event of drought, water shortage will affect the differentiation of spikelets and florets of the ear, which will result in empty stalks or baldness. The water requirement period of sweet corn must be irrigated and furrowed 1-2 times, and there should be no accumulation of water in the field after irrigation.
Sixth, field management seedling field management
(1) Check the seedlings, make up the seedlings, and ensure that the seedlings fill the seedlings in time after seedling emergence. In the Honda block, the seedlings at the seedlings will be transplanted to the seedling-deficient areas. The time can be cloudy or sunny in the afternoon. Use a spatula to shovel the roots of the remaining seedlings until the seedlings are planted and watered.
Gynecology And Obstetrics Surgical Pack
Delivery Obstetric Drape Pack,Natural Labour Delivery Pack,Surgical Gynecology Pack,Birth Packs Universal Surgery Pack
Suzhou JaneE Medical Technology Co., Ltd. , https://www.janeemedical.com