How to fertilize the latest greenhouse grapes? Skills of topdressing grape in greenhouse

Grape is a very popular fruit in our country. Grape has strong growth ability and can grow normally on most soils. There are many grape planting models now, but they are generally based on greenhouse planting. When planting grapes in greenhouses, we must pay attention to topdressing. So how do you top it? The following small series will bring you greenhouse grape topdressing skills, let's take a look together!

1. Root topdressing

The first thing to do is definitely root topdressing work. When grape plants appear for the first time, pay attention to applying appropriate amount of ternary compound fertilizer, and keep the dosage per mu at about 50kg. Then after the fruit expansion stage, a second topdressing is carried out, usually after the flowering. A final topdressing is then carried out before the fruit is harvested. The top dressing method is generally based on furrow application. First, a fertilization ditch with a depth of 18cm and a width of about 20cm should be dug at about 35cm on both sides of the planting site, and then fertilizer should be sprinkled into the ditch to cover the soil, and then appropriate watering should be done.

2. Topdressing outside roots

Topdressing is not only suitable for open-field cultivation mode, but also for greenhouse grapes, topdressing outside roots in greenhouse can also play a very good role. The time of topdressing outside the root is generally about a week before flowering. In the week before flowering, we should spray foliar fertilizer about 3 times. Urea, amino acid compound fertilizer and Jinbilai are the main fertilizers. Then after the flowers wither, spray foliar fertilizer for about 3 times every half month to provide sufficient nutrition for grape growth and enhance the growth ability of grape leaves.

3. Carbon dioxide application

Now, when growing grapes, there are also ways to use carbon dioxide fertilizer. Carbon dioxide fertilization is to increase the amount of organic fertilizer applied to the soil, and then cover the ground with straw to improve the soil and increase the permeability of the soil, so as to achieve the purpose of increasing carbon dioxide concentration. The CO2 in the room can then be replenished by ventilation until it is close to the CO2 content in the atmosphere. Every day 10:00 - 14:00 is the best ventilation time, according to the temperature control good ventilation time, if the temperature reaches 25 degrees, then start ventilation, until the temperature drops to 22 degrees when closing the vent.

In addition, we can supplement carbon dioxide by applying solid carbon dioxide fertilizer. The above is a simple introduction to greenhouse grape topdressing skills. The topdressing work of greenhouse grapes is very important, which directly affects the yield and quality of grapes, so we must pay more attention to it. Today's introduction is here, this article is for reference only, I hope to be helpful to everyone.