At present, the province's corn is in the period from the big bellmouth to heading, and it is a key period for the management of corn fields, and it is also an important period for determining the formation of production. However, since July, the province has experienced continuous heavy rainfall. The province’s average rainfall exceeds 340 mm, and some cities and counties (cities, districts) exceed 400 mm. Most regions have rain and sunshine, and some areas have accumulated water in the fields, causing serious damage. It has an adverse effect on corn production. Recently, the Provincial Department of Agriculture organized expert groups and technicians of the corn expert group of the province's agricultural expert advisory group and corn industry technology system. They conducted inspections and tour guides on corn production and growth in the 17 cities of the province, and convened corn production in the province. Situation experts discussed the development of targeted corn management techniques in key areas.
First, pay close attention to drainage
All localities must continue to organize human and material resources, and increase the intensity of drainage and scorching activities. Dispatch large-scale machinery to clear the drainage main road, increase the amount of flood discharge, clear the drainage ditch, organize farmers to enter the ground to open ditch, and assault to exclude water from the field. Blocks with no clear water should take advantage of the favorable timing of rainfall breaks, organize manpower to dig trenches, drain and intertillage, reduce the humidity in the field, enhance soil permeability, and improve the rhizosphere environment of crops.
Second, timely supplement of quick-effect fertilizer
At present, most of the corn is in the period from the big bellmouth to the heading, and it is a critical period for corn growth. Because the land that has not been fertilized during the previous period of time has to pay attention to top-dressing. In particular, the absorption capacity of the roots of maize was reduced in the formerly affected land, and the available nitrogen fertilizers such as urea should be added to promote the growth and development of corn. About 500 kilograms of land per mu can be topdressed with 15-20 kg of urea and about 10 kg of potassium sulfate. Fertilization should be carried out by burying or using mechanical rakes to avoid spreading. To prevent premature aging of corn, 7.5 kg of urea should be applied per acre for the grain filling period.
Third, prevent lodging
In lands prone to lodging, measures such as cultivating soil by cultivating can be adopted to promote aerial root development, increase potassium fertilizer, remove weak plants, improve population structure, and increase plant resistance to lodging. For lodging plants, the plants can be straightened as appropriate, and the surrounding soil is compacted.
Fourth, do a good job of prevention and control of pests and diseases
Focus on prevention and control of armyworm, corn borer, aphids and other pests and brown spot, large spot disease, rust and other diseases. The armyworm can be sprayed with 50% phoxim 1000 times spray. Corn borer and other ear worms can be used 90% trichlorfon 800 times drop irrigation control. The corn borer can be sprayed with 50% for 8 to 10 grams per mu, or 10% imidacloprid per acre for 10 to 15 grams of water plus 45 kilograms of spray control. Brown spot, large spot, Curvularia leaf spot can be controlled by 50% carbendazim 500 times spray, rust can be used 20% Trifenin EC 75-100 ml per acre spray control.
Fifth, do a good job of artificial pollination
It is necessary to pay close attention to the pollination of corn and take timely response measures. High-yield fields can carry out artificial castration and assisted pollination. In the event of continuous rain or extreme high temperatures during flowering and pollination of Daejeon corn, artificial remedy measures such as pollination should also be taken to effectively increase the seed setting rate and increase the number of grains per panicle.
Sixth, pay close attention to the regular late harvest
The area of ​​live summer corn planting this year is relatively large, and the number of hours of sunlight exposure during the previous period is small, and the lighting conditions are poor. It is particularly necessary to compensate for the light and accumulating temperature. Local authorities must pay more attention to the regular and late harvest work. It is necessary to promote large-scale continual advancement of the whole construction system and to eliminate peasant households from fear of losing their ideological suspicions; in order to promote joint agronomy and agronomy, agricultural machinery operators and peasant households should act together to prevent the combine harvester from heading to the ground prematurely. The general plots should be harvested at the end of September and early October. The plots planted later and the plots with long planting dates should be harvested before and after October 10.
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