High-yield cultivation techniques of Green Food Sweet Corn

Green sweet corn is popular because of its high sugar and protein content and good taste. It is a good product in the green food corn market. However, it is extremely vulnerable to diseases and insect pests in growth, which seriously affects the quality and yield. Therefore, in order to obtain green food sweet corn with high quality and high yield, we should not only select good varieties according to local conditions, but also take a series of measures in production.

1. Land selection and meticulous land preparation. Choose plots with convenient drainage, good ventilation, sufficient light and deep soil layer. After deep turning and exposure for several days, the soil cutting will be fine, the field will be leveled, and the edge ditch will be opened.

2. Planting specifications. It varies according to the variety, generally planting 3000MUR 3500 plants per mu. If the density is too dense, it is easy to form a slippery rod, while properly sparse planting, the double packing rate is high, and the yield of fresh ear is higher. Field cultivation can be planted in a single row, with a plant spacing of 25ml / 30cm and a row spacing of 75cm. It can also be adopted.

Cultivated in wide and narrow rows, 50 cm in narrow rows and 90 cm in wide rows.

3. Seed soaking and sprouting. Sweet corn has high sugar content, and its seeds are easy to be eaten by underground pests in the soil, resulting in lack of seedlings and ponds. Therefore, it is best to accelerate germination and sow seeds.

Seed treatment. Select full and strong seeds, first soak them in clean water for 24 hours, then soak them in 50% carbendazim or 75% topiramate 500 times solution for 3 hours, wash them out and control them to dry and accelerate germination.

Sprouting. Put the seeds in a container covered with dry linen cloth, spray an appropriate amount of hot water for 40 ℃ and 50 ℃ on the surface of the seeds, cover with a wet cloth, and sprout in 24 hours at the temperature of 25 ℃. If the external temperature is low, warming measures should be taken to promote seed germination. It is better to show white buds, not too long.

4. Sow seeds. To sow the whole seedling once is the key to the success of sweet corn cultivation. Before sowing, treat the sowing pond with chemicals, apply the base fertilizer and water thoroughly. 4 germinated seeds were sown in each pond. After spraying insecticides on the surface of the seeds, the soil can be covered, so that the liquid can spread in the soil. Ants and other pests can not harm the seeds. Cover the soil 1-2 cm, 3-4 days can be seedling.

5. Field management. Interseedling and fixed seedling should be completed before 3 leaves in accordance with the principle of early morning, uniform retention, timely, de-dense and sparse, weak and strong. The density of 3 000 trees per mu was ensured by keeping seedlings per pond or alternately with two plants per plant.

Water management. After sowing to 3 leaves, if the soil is dry, it should be watered every day. After that, appropriate amount of water can be watered according to the weather conditions. In the first 10 days and 10 days after heading, there should be no shortage of water, and deep water should be irrigated twice in some droughts to ensure the water demand at the panicle stage.

Fertilizer management. It is best to choose imported compound fertilizer, 20-30 kg per mu and about 10 g per pond. In the process of maize growth, topdressing was applied twice, and seedling fertilizer was applied at 3-4 leaves of the plant for the first time, and the soil was cultivated after fertilization. Each time, 10 grams of urea were applied per pond, and 30-40 kilograms of urea per mu.

6. strengthen the prevention and control of diseases and insect pests. Timely control of diseases and insect pests is the key to ensure high yield. The prevention and control of diseases and insect pests should give priority to prevention and strictly put an end to the occurrence and spread of diseases and insect pests.

Control underground pests. The control of underground pests is the key to ensure a high emergence rate. Underground pests are mainly ground tigers, ants, slugs and so on. For the ground tiger, about 0.5 grams of 3% furan granules were applied to each pond before sowing, and the dosage was about 1 kg per mu. For ants, spray the seed surface with 1000 times of omethoate. After the seed is covered with soil, 0.3 grams of insecticide is applied on the soil surface, which can effectively control slugs. The previous vegetable planting land should do a good job in the prevention and control of tigers, and attention should be paid to the prevention and control of slugs when sowing in the rainy season.

Pest control during the growing period. The seedling stage is easy to be damaged by locusts, Spodoptera litura and other pests, and the main pests in the middle growth stage are corn borer and aphids. On the other hand, the disease should focus on maize leaf spot and stem rot. Insecticides were generally sprayed twice after emergence, and the mixture of insecticides and fungicides was sprayed once at jointing stage and heading stage. In the high-temperature and rainy climate, pay attention to the changes of the leaves, once found that there are round yellow dots on the leaves, it is necessary to quickly spray fungicides. During the occurrence of diseases and insect pests, the drug was sprayed once every 5 murals every 7 days, for 3 times in a row. The insecticides to control corn pests are: 40% dimethoate or omethoate EC 800x, or 2.5% dimethoate EC 2500 times. There are 50% carbendazim, 75% topiramate, or 75% chlorothalonil wettable powder 8-1000 times as much as 50% carbendazim. To prevent the occurrence of stem rot, lime powder can be applied during soil preparation. During the growth period, lightly diseased plants are sprinkled around the roots, seriously diseased plants are removed, and lime powder is sprinkled in the hole to strictly prevent the spread of bacteria. Never use a single pesticide for a long time. Combined with ploughing and fertilization, the seriously diseased leaves at the base of the plant were removed and buried deeply, which could effectively reduce the harm of large and small spot disease.

Strengthen the prevention and control of rodent damage. After the corn is male, the rodent bait can be continuously put in the field to prevent the harm of rats and ensure a high yield and harvest.

In order to shorten the mature period of green corn, after 15 days of heading, the filament of female ear has been yellow and withered, and the male ear can be removed manually. On the one hand, it can cut off the food source of aphids, on the other hand, it can reduce the nutrient consumption of plants, accelerate the growth of female ears, shorten the growth period, and harvest green corn in advance.