The latest course of planting techniques and methods of plastic film onion

Because of the different planting time and planting area, onions can be divided into autumn planting and spring planting, in which autumn planting is dominant in the south of Beijing and spring planting is mainly in the north of Beijing. Plastic film technology is mostly used in onion planting. So how to manage the planting of plastic film onion? Come and have a look with the editor.

1. Planting time

Autumn planting is widely used in the south, which is generally planted about 40 days before the severe cold, which makes the onion root system grow again, the leaves grow rapidly after turning green, and the seedling growth period is long, so the yield is higher than that of spring planting. In the north, it is difficult to survive because of the severe cold in winter, so it is mainly planted in spring. In principle, it should be planted early in spring, and should be carried out as early as possible after soil thawing, in order to strive for a longer growth period and grow more leaves in the bulb expansion period. increase yield.

2. Fertilizing to make beds

Onion is a kind of fertilizer-loving crop, and the lack of any kind of nitrogen, phosphorus and potassium fertilizer may reduce its yield, so in order to achieve high yield and high quality, base fertilizer must be fully applied before planting. Generally, 50 kg of high nitrogen, phosphorus and potassium compound fertilizer and 5000 kg of rotten farm manure are applied per mu, and then ploughed evenly on the border surface, and then ploughed and raked fine to make a border 100-120cm wide.

3. Choose strong seedlings

The seedlings with the age of 50-55 days should be selected before transplanting, which are easy to root and recover quickly after transplanting. Foliar fertilizer of potassium dihydrogen phosphate is sprayed 10-15 days before transplanting, which can promote the early rooting of seedlings after planting.

4. Covering plastic film

Plastic film mulching can enhance the cold resistance of onion in winter, improve the ability of soil water and fertilizer conservation, and greatly increase the yield of onion. Before plastic film mulching, it is necessary to irrigate enough water to make soil moisture. After the water in the border is fully permeated, the herbicide is sprayed once to cover the plastic film. Film mulching should be carried out in a windless climate and compacted with clods on both sides of the plastic film, otherwise the plastic film will be damaged because of the wind, and it is not conducive to field operation.

The above is the introduction of plastic film onion planting technology. I hope it can help you. If you want to know more about it, please follow us.