Small-sized ridge cultivation techniques for cultivating maize
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2. Soil preparation Fertilization Less cultivating ridge cultivation is mainly to use the marginal advantage to achieve the purpose of increasing production. Take the fall to destroy the underground pests and weeds, spacing 50 cm, preferably the North and South Ridge. During the land preparation, the basal fertiliser was 3 cubic meters per 667 square meters of high-quality farmhouse fertilizer; the compound fertilizer containing 15% N, P, and K of potassium (Sarco) was 15-17.5 kg, 8 kg of potassium sulfate; and the topdressing urea was applied twice. Measure 25-30 kilograms, chase before using 50 grams of chemical fertilizer synergist Babaan mix thoroughly in urea, the first time in the 8 leaves of corn, apply 10-15 kilograms per 667 square meters, the rest in the big Tail mouth topdressing, fertilization depth of 5 cm, chase after the cover soil.
3. Sowing 10 years of drought in the western Liaoning region should be planted in due time. Usually sowed around April 5. For every 667 square meters, 4 kg of corn seeds are used, and mechanical trenches are planted at equal distances, so as to sow two ridges and one ridge, sowing 4-5 centimeters deep, 23-24 centimeters of plant spacing, and keeping 3300-3500 strains of seedlings. After plugging in, use Ishigaki to suppress it.
4. Field management 3-4 leaves after emergence, artificial Dingmiao, remove sick and weak hybrid seedlings, lack of seedlings can stay a hole to stay two. Artificial weeding is labor-intensive and can be done by chemical weeding: 1 72% 2,4-D Butyl Ester 50 ml per 667 square meters Water 50-80 kilograms in the 3-6 leaf stage of maize Broad-leaved weeds have a good control effect. 2 For every 667 square meters, add 150ml of 33% weeding chlorinated EC and add 150-200ml of sargasatide. Mix the spray on water at the 4-5 leaf stage of corn to control various annual weeds.
The use of herbicides during the entire growth period of the corn is no-till and shovel-free. However, in order to increase the absorption area of ​​the root system, it should be combined with top dressing twice. When the first fertilizer was applied, 1/3 of the empty ridges were used. The second time the top dressing was made with the deep hoe, the 1/2 ridge of the empty ridge was intensively applied to the two sides of the corn ridge to form an oversized ridge, satisfying the absorption of the root system. Nutrient area requirements. Occurrence of armyworm can be controlled by 0.04% of insecticide powder. Prevention of corn borer can be combined with Trichogramma, a total of two bees. In the later stage of maize waxing, standing stalks can be used for tanning. Harvested when ripe.