At present, the growth period of corn in Suzhou is in the earing stage (jointing stage - tasseling stage). Due to the continuous spread of high temperature and drought, the corn seedlings are generally weaker than last year. Recently, agricultural experts have opened “medicine prescriptionsâ€, and hope that the majority of farmers’ friends will immediately set off a drought-resistant and fertilizer-promoting seedling transformation, and resist the pests and diseases of grass and insects to ensure a good harvest.
Taking the status of corn growth in Baqiao area as an example, the plant has grown more than 16 leaves and entered the big bell stage to reach the first class of seedlings. The field is about 56,000 mu, accounting for 4.2% of the total area of ​​the whole district, compared with 32.05 in the same period last year. %; 14-16 pieces of land reaching the second type of seedlings standard area of ​​235,000 mu, accounting for 17.61%, compared with 44.27% in the same period of last year; 9-13 pieces of leaves in the jointing stage reached 1.0283 million mu, accounting for 77.07%; There are 7-9 leaves in the late stage of seedling hazard or planting, and 15,000 mu of land that is about to enter the jointing stage, accounting for 1.1%, and the third type of seedlings accounted for 78.19%, compared with 23.68% in the same period of last year. Blocks account for 2.5%, and it is expected that the area of ​​corn in the region will reach more than 20% after one week. The results of the five monitoring points in the district were: only one point in Zhenbei reached the standard of second-class seedlings, 14 leaves and leaf area index of 2.01, and the other four monitoring points belonged to three types of seedlings. The earing stage is a critical period for the demand for water and fertilizer throughout the growing period of corn. Therefore, strengthening the field management of corn ear is the key to capturing high quality and high yield of corn. In view of the actual situation of corn growth in Baqiao District, the field management of the corn ear of Suzhou City should focus on the following tasks:
Fertilizer management. For corn fields that have been damaged by waterlogging, failing to timely plan, weeding and planting later, it is necessary to timely plan and weed, and to apply the jointing fertilizer, to bias the seedlings and weak seedlings, to weaken and strengthen the field, and to improve the field. degree. During the jointing and booting period, especially in the big bell mouth period, the water should not be lack of water. In the case of drought, the water should be poured well to ensure the good growth of the plants and the normal differentiation of the tassels, and prevent the “ka neck drought†from reaching the surface and seeing the wetness. The need for corn during the jointing and booting period is maintained at more than 70%. According to the forecast of the meteorological department, there is no obvious precipitation in the past week. It is necessary to pay attention to the development of drought, timely pouring water and producing water, and not pouring water for life. Combine fertilization and attacking fertilizer while watering. The big bell period is a critical period for the ear, and the amount of topdressing should account for 40-50% of the total. In general, 15 kg of urea is applied. When you are topdressing, you have to look at the sky, see the land, and see the crops. The fertilizer application can increase the fertilizer efficiency by applying the rain season or concomitant watering. The specific method is to apply top dressing in the middle of the plant with top dressing machinery or manual shaving. Deep application into the soil, to attack the ear to increase grain, after topdressing and watering, it is necessary to carry out deep and intermediate cultivation in time to remove weeds. During the jointing and booting period, it is necessary to combine fertilization and watering, timely smashing the soil and cultivating the soil to achieve weeding, moisturizing and moisturizing, and promoting roots and anti-falling to ensure a good harvest. Combine with the soil, dredge the three ditch, ensure that the sputum can be discharged, and reduce the damage of smear.
Disease, insect, grass damage prevention. Disease prevention and treatment. Corn sheath blight, corn large, small spot disease, brown spot disease, bacterial stem rot and other diseases can occur in the whole growth period of corn. Corn sheath blight: 2-3 leaves can be stripped at the early stage to control the spread of the disease, and the base of the stem is sprayed 2-3 times with 5% Jinggangmycin 1000 times solution. Bacterial stem rot: At the beginning of the disease, 5% bacteria can be used to clear 600 times liquid or agricultural chain toxin 4000 times liquid spray, and the diseased plants are removed in time to take out the field treatment. Large and small spot disease, brown spot disease: The disease is sprayed 2-3 times with 50% carbendazim or 70% methyl thiophanate 500-800 times. Pest control. Maize jointing stage focuses on the control of corn borer, aphids and armyworms. Prevention and control of corn mash: using phoxim granules or chlorpyrifos granules in the heart of the big bell mouth into the heart, the effect is better. Controlling aphids: Controlling with pesticides such as mites. Control the armyworm: the heart leaf can be sprayed with chlorpyrifos EC or cyhalothrin 1000 times solution. Grass damage prevention. Fields with more weeds can be sprayed with paraquat and protective cover to control weeds.
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