What are the key points of ice grape cultivation techniques?
Ice grape is a new type of grape variety; after the fruit ripens, it can remain on the vine for a long time even without being harvested. Its harvest period can be delayed by about one month. Nowadays, ice grapes can not only be eaten raw, but are also the main raw material for ice wine. The wine produced has a mellow taste and good quality, and is loved by many people. So how should ice grapes be cultivated? Below, the editor brings you the cultivation techniques for ice grapes. Let's take a look!
1. Seedling selection and orchard establishment
Ice grape seedlings should have more than 7 lateral roots, with a length of no less than 18 cm, and plenty of fibrous roots. Then, before planting, do a good job of land preparation, control the planting density well, and dig the planting trenches. The depth and width of the planting trenches should be controlled at about 50*50 cm. Then apply sufficient base fertilizer, mainly farmyard manure. If the soil's moisture-retention capacity is not strong, then during planting, water thoroughly and firm the soil by treading on it. Then build ridges of about 12 cm, cover with plastic film, and water sufficiently. The survival rate can approach 100 percent. If missing seedlings or gaps are found in summer, replant in time.
2. Water and fertilizer management
Grape growth has a relatively large demand for nutrients. Throughout the entire growth period, the demand for potassium and calcium is the greatest, followed by nitrogen and phosphorus. When fertilizing, apply more organic fertilizer. After the fruit ripens, apply a full base fertilizer once to promote growth the following year. Then, during the fruit expansion period, also apply a topdressing of decomposed farmyard manure once, mainly by trench application. Water is also very important for the growth of ice grapes. When the water content of the orchard is below 60 percent, water in time, mainly by small-drop drip irrigation. Water should not be excessive either; when there is too much, pay attention to drainage work to prevent waterlogging damage.
3. Bud removal and shoot thinning
When the new shoots of ice grapes grow to about 6-9 cm, promptly remove the buds about 45 cm from the ground. Then, when two new shoots appear on the trellis, keep the new shoot with more inflorescences, thicker and stronger growth, and a good growth position, and remove the excess. Buds that are too dense should also not be kept; maintain the density of buds on each vine at about 10 cm. Control the timing and number of bud removal according to tree vigor to avoid consuming too many nutrients. Then, when the new shoots grow to about 16-18 cm, observe the growth of the inflorescences on the new shoots. Keep about 9 per square meter and do a good job of shoot positioning.
4. Flower and fruit management
During the periods of ice grape flower buds and early flowering, pay attention to spraying once with Sulexbor and similar products to promote pollen growth and improve pollen fertilization rate. If water shortage occurs during the flowering period, then spray water in time to increase field humidity, lower temperature, and prevent adverse climate from affecting the growth of ice grapes. The fruiting amount of ice grapes has a certain relationship with tree age and tree vigor, and to ensure yield, it is necessary to increase the leaf area of ice grapes. We should estimate the fruiting amount according to the nutritional level and tree age of the ice grape vines, and then do a good job of fruit retention.
The above is a brief introduction to ice grape cultivation techniques. The cultivation methods of ice grapes are somewhat different from those of ordinary grapes. Therefore, before planting, be sure to do a good job of learning the cultivation techniques. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!