Corn Field Management Technology
1, seedling field management
(1) After the emergence of corn, the five leaves of the three-leaf seedlings will be seedlings, leaving 5% of the planned seedlings, so as to facilitate multiple extractions of weaker plants and improve the uniformity.
(2) Chemical weeding: Before emergence, when the soil is full of moisture, spray the ground with 40% EtOH mixture 200-250ml/acre and 50-60kg water before emergence.
(3) Prevention and control of seedlings Thrips, stickworms, cotton bollworms, tigers and other insect pests with cypermethrin 100ml + omethoate 75ml water 30 kg spray.
(4) Suitable seedlings at seedling stage, watering when the soil moisture content is less than 55% of the field capacity.
2. Maize (middle-season) field management
(1) Prevention of corn borer: corn horn mouth period (8-9 unfolding leaves) or big bell-mouth period (12-13 unfolding leaves), 1.5% phoxim granules added with fine sand or fine soil 1: 5 match the loss of the heart of the corn leaves, 1-2g per plant, or use 3% phoxim granules added fine sand or 1:5 ratio of fine soil lost corn heart leaves, about 1g per plant.
(2) In this period, the amount of water needed is large, and water content in the soil is lower than the field water capacity of 65-70%.
3, scientific fertilization: According to the results of soil testing formulations, balanced fertilization and the use of formula fertilizer, should ensure 25 kg per acre pure nitrogen, pure phosphorus 9 kg, 10 kg of pure potassium, zinc sulfate 1 1.5 kg, a single application of phosphorus and potassium In addition, nitrogen fertilizer was topdressed at 1/3 and 2/3 in 25 and 45 days after sowing.
4, actively promote the control of anti-fall technology: In addition to seedlings, cultivator soil and other measures for prevention and control, can be sprayed before plant growth regulators for prevention. Such as the use of gold soil jade 30ml/mu, spraying in 7-12 leaves, reducing empty trees and bald, resistance to yield increase.
5, Maize late (flowering period) field management
(1) Prevention and control of third-generation corn borer: The third generation corn borer of corn in the late stage mainly damages the ear and filaments, and can use 600 times of liquid droplets of dichlorvos.
(2) Control of rust during the late growth period of corn: spraying 20% ​​Triadimefon 1500 times in the early stage of disease, and 75% Trichoderma spp. To find the right medication in time.
(3) The water requirement is 15-20 days after tasseling, and the slurry water is poured when the soil moisture content is lower than 70% of field capacity.
(4) In the early stage of corn tassels, use 1kg urea + potassium dihydrogen phosphate 0.15kg + water 60kg spray. Artificial interlaced and assisted pollination were performed later.
6, corn ear grain milk disappeared timely harvest, change the phenomenon of premature harvest, seize high yield bumper harvest.
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