Technical Code of Production and Yield of Summer Maize

I. Maize seeding techniques (I) Selection of good varieties Early sowing and selection of high-yielding compact maize varieties Zhengdan 958, Yandan 2O, Jifeng 96, Zhongke 11, Dandan 26, Reebok 1, Fengli 2008 The semi-vertical type, Saitama 16, etc., was sown early on the occasion of the grab between May 25th and June 10th. In order to increase the commodity value of corn, only one species is planted in one area and 2-5 species in one village.
(2) Seeding method and planting density The sowing method adopts wide and narrow row planting, with a width of 2.4 feet, a narrow row of 1.2 feet, a compact type of plant spacing of 0.7-0.8 feet, a planting density of 4000--5000 plants per acre; The leaf type plant spacing is 0.8-1.1 feet, and the planting density is 3000-4000 strains per mu. The sowing depth is 5 cm. Mechanical sowing can be done with a double-row shovel seeder or a single-row corn planter.
(3) Precautions for sowing
1. Corn sowing must be completed before June 10th.
2, sowing depth of 5 cm, requires the same depth, covered with soil without waste.
3, the next planting, such as lack of moisture, watering immediately after sowing.
4, in order to increase production, strong seedlings early, before sowing can be sown before the planting of 10-15 pounds per acre (fertilizer is best to use monoammonium phosphate or diammonium, can not use urea or high nitrogen compound fertilizer, otherwise it will affect germination).
Second, corn pest control technology (a) seedling pests after emergence, attention to seedling pests, mainly tigers, thrips, armyworm.
1. Control of ground tigers: Remove weeds in the field and eliminate eggs and larvae. Symptoms of harm were discovered, spraying with 2.5% trichlorfon powder 2–2.5 kg per acre, or 9 O% trichlorfon 50 g water plus 4 O kg spray.
2. Thrash horse control: 50% of phoxim 50% water and 5O kg of water are sprayed.
3, armyworm control: The control effect is good before the third instar, mu with 10% beta cypermethrin 10 grams or 4.5% beta cypermethrin 50 grams plus water 5 O kg spray.
(II) Prevention and treatment of corn stalks at the heart-leaf stage with 3% phoxim granules to lose the heart, 50 to 80% for diuretic fodder, 50 grams for dichlorvos, 50 grams for water, 20-30 kg for irrigation, or 90% for di 50 grams of water plus 40 kg of sprayed ear.
(c) The latter stage of pest control and prevention, "killable" 50 grams of water and 30 kg of spraying, control of corn bacterial wilt, and concurrent stem rot, with 20% triadimefon 5 O grams of water plus 5 O kg sprayed to prevent rust.
III. Corn Field Management Technology (1) Field Management
1. A spraying herbicide: After sowing, before sowing, spraying acetochlor in the corn field, 100 milliliters of water per mu per mu, or corn treasure, 150 tons of water per acre, 50 tons of water per acre, uniform spraying. Post-emergence eradication, available free-flowing 100 ml per mu or corn treasure, Xuanhua B 150-200 ml or paraquat 100 ml plus 50 kg water evenly directed. Be careful not to spray the liquid on the corn leaves.
2. Wheat stalk cover: After sowing and spraying of herbicides, the wheat stalks harvested in this block of wheat fields are covered between rows of corn.
3, fixed seedlings: 5 leaves after the emergence of Dingmiao with seedlings, according to the variety of attributes to determine the density. When setting seedlings, go to big seedlings, go to small, weak, disease and insect seedlings, and keep strong and uniform seedlings of the same size.
4. Watering: In the field soil moisture of 1 day before and 10 days after tasselling, the water holding capacity in the field should be maintained at 75-80%. Water shortage should be promptly watered, and there must be drainage in the field.
5. Chemical control: When there are 8-10 leaves of corn, 8 g of DHA is evenly sprayed with 30 kg of water to reduce plant height and prevent lodging.
6. Fertilization by stages: In the 25-30 days after sowing, 4 O kg of special corn fertilizer will be applied at the jointing stage. The booting period, that is, about 45 days after sowing, Mu recovers 10 kg of urea.
(II) Harvesting crops on a regular basis Harvesting corn crops on a perennial basis is generally early, and grouting has not been completed before harvesting to reduce grain weight and affect yield. Should be harvested at the end of grouting after the disappearance of the grain milk line. It is harvested about 7 days later than the annual production.


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