Notes on autumn corn cultivation techniques

Vegetable corn has high nutritional value. In addition to adopting early spring mulching film to cover the early maturity supply market, it can also be used for delayed cultivation after autumn. As long as the cultivation and management is proper, the average yield per mu can reach about 1000 kg, and the autumn season around October should be The city has not only enriched the market supply, but also opened up new avenues for the full development and utilization of late autumn resources.

The key points of cultivation techniques for autumn corn are:

First, the rational layout of autumn corn is the same as spring corn and summer corn. It must have enough accumulated temperature, light and moisture to complete the whole process of growth and development. Generally, the average temperature in the first half of September is above 23 °C, and the average temperature in mid-October is above 17.5 °C. Autumn corn can be grown in areas with abundant light and rainfall resources. Autumn corn has a stricter choice for the plot, requiring the plot to be sunny and deep in the soil layer, and retaining water and fertility. It is better to use the early spring crops. At the same time, a region should consider the market conditions and sales channels and other objective conditions to rationally lay out the cultivation of autumn corn.

Second, the varieties used in the growth period of autumn corn have many disasters, high temperature and drought in the early stage, and autumn rain in the late stage, so the variety selection is very important. You should choose a glutinous variety that has strong resistance to stress, high yield, and early maturity. The current varieties with good performance are: Susong No. 1, No. 1, No. 2, etc. The general growth period is about 80 days, the quality is good, the taste is sweet and sweet, suitable for consumers' needs.

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Third, the timely sowing and transplanting period should be based on the local climate law, variety characteristics, and pre-mixing factors. The high temperature and drought in Chongqing began on July 20 and ended around August 15. The autumn rain was concentrated in the middle and late September, the autumn maize growth period was about 80 days, and the sowing was 50-60 days. Autumn corn should be sown in mid-July, with pollination in early September and 10 in mid-term. The sowing method is based on the urgency of the sputum. It is advisable to transplant the seedlings, transplant the three leaves and one heart, and apply the roots to clear the manure water after planting.

Fourth, the application of the base fertilizer, reasonable close planting: the bottom fertilizer with 2000 kg of soil slag fertilizer + urea 15 kg or ammonium bicarbonate 30 kg + superphosphate 30-35 kg into the planting ditch, or apply 35% of corn special fertilizer 40 kg. Due to the short growth period of autumn corn, it should be properly planted, 3500-4000 plants should be planted in an acre, and about 1.5 kg per mu.

V. Field management: The temperature of the autumn planting corn is high during the growing period, the seed emergence is fast, and the seedling can be emerged 3-5 days after sowing. After emergence, use clear manure water to protect the seedlings from drought, and fix the seedlings after 10 days, leaving 2 plants per litter. At the same time, use 5 kg of urea to clean the manure with 2000 kg of seedlings. After entering the jointing period, the mu is topdressed with 10 kg of urea or 25 kg of ammonium bicarbonate. Corn is a fertilizer-tolerant crop. Adequate fertilizer and water is very important for establishing a high-yield shelf and obtaining high yield. Therefore, when the corn enters the booting and booting stage, that is, 40-50 days after sowing, it should be re-applied with a tapping fertilizer, 30 kg of urea per mu or 80 kg of ammonium carbonate and 2000 kg of drenched water. The autumn maize male flowers are not developed, the pollen volume is small, and the high temperature and drought cause the flowering period to be uncoordinated, and artificial supplementary pollination must be carried out. Artificial pollination can increase the seed setting rate and generally increase production by more than 10%. Artificial pollination is carried out at 8-11 am on sunny days during the flowering period and repeated 3 days later.

Sixth, pest control: The main pests and diseases of autumn corn have sheath blight, aphids and aphids. Among them, aphids are the focus of prevention and control. The aphid occurrence of autumn corn is large and the damage time is long, which not only harms the heart leaf, but also damages the tip of the stem and the ear. It is mainly used for the control of aphids, and the best use of insecticidal double granules. In the big bell stage, about 1 gram of insecticidal double granule snack was used per plant, and after 5 days, it was found that it was not removed once again. The control of sheath blight, aphids and leaf spot is the same as that of spring maize.

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