Planting technique of Seedless A17 in Zitian

Choose a piece of high-lying alkaline sandy soil or sandy loam soil to build a garden, and deeply plough and apply sufficient basic fertilizer to dig a ditch with wide 50cm and deep 50cm. Then choose a strong tip from the main vine as the main tip and plant it into the soil. After successful planting, the basic management work such as water and fertilizer, pruning, scaffolding, pest control and so on can grow fruit.

Key cultivation techniques of Zitian Seedless A17:

1. Build a garden

The garden is built in sandy soil or sandy loam with high topography, sufficient light, annual precipitation below 700mm, deep soil layer, irrigation and drainage conditions, good drainage and pH 7-8. Before planting, the planting ditches with length, width and depth of 60-80cm were dug, the topsoil was applied to the bottom layer, and then mature organic fertilizer or organic biological fertilizer was applied. Fill with water after filling, and then return to fill the soil after the soil surface sinks.

2. Shaping and pruning of scaffolding

(1) the year of planting. Each plant retains only one strong shoot as the main vine culture, erase the extra buds and pinch off the newly grown tendrils in time. When the main vine grows to 1 m, the sprouting secondary shoot leaves 2-3 leaves to pick the heart repeatedly. Winter pruning was carried out from the end of October to the beginning of November. The main vine was cut short at 1.0-1.2m and 1.2-1.5cm in thickness, and all the secondary shoots on the main vine were cut off.

(2) the second year of planting. After sprouting, no branches were left in the 50cm range of the main vine from the ground, and a strong shoot was selected as the main shoot to continue to grow. After coring, the new shoots of the first bud were coring for the second time when they were 0.4-0.5m long, and then 3-4 leaves were left for repeated coring.

(3) the third year of planting and after. According to the management method of the second year, continue to cultivate the main vine and expand the shelf surface.

3. Flower and fruit management

The fruiting branches of 2-year-old strong trees leave one inflorescence, each plant retains 3-4 inflorescences, sparse inflorescences and pre-inflorescences. After the inflorescence is separated, the inflorescence is reshaped before flowering, the divergent shoulder at the base of the inflorescence is pinched off, and then the inflorescence tip is pinched according to the size of the inflorescence (accounting for about 1 inch of the inflorescence). After setting fruit, the ear is managed in time, generally, the first fruit thinning is carried out when the fruit is as big as mung bean, and the injured grains, small grains, disease and insect grains, inward growing grains and too many grains are cut off manually, so that the ear is cylindrical or conical.

4. Fertilizer and water management

(1) the year in which the seedlings were planted. When planting, 667m2 applied rotten organic fertilizer 4000-5000kg. Topdressing fertilizer frequently, less, shallow, pay attention to the proportion of N, P, K fertilizer, combined with irrigation and fertilization for 4-5 times.

(2) after 2 years of seedling colonization. Before sprouting, urea 10kg or nitrogen-containing compound fertilizer was applied to 667m2 before sprouting in the middle of April, urea was the main fertilizer before flowering, P and K fertilizer was appropriately increased and covered with basic fertilizer such as sheep manure, fruit water was irrigated in the middle of June, the amount and types of fertilizer were the same before flowering, coloring fruit expansion water was irrigated around July 20, mainly phosphorus and potassium fertilizer, and foliar fertilizer was also sprayed.

5. Application of plant growth regulators.

The application of 40000-fold Qibao solution 7-10 days before flowering could significantly lengthen the ear, make the ear loose and reduce the intergranular extrusion, and the treatment with 12500-fold Qibao solution 15 days after anthesis could significantly promote the expansion of fruit.

6. Ear bagging

Ear bagging can prevent diseases, insect pests, bird pests and pollution, and improve the comprehensive quality of fruit. This variety is easy to color under the condition of scattered light, can fully complete the whole coloring process in the bag, and does not need to remove the bag in production, so it is very suitable for bagging cultivation. Generally, about 20 days after anthesis, it is suitable for ear shaping and grain thinning, when the fruit grain is the size of soybean grain. Before bagging, the whole garden should be evenly sprayed with fungicides, especially the ears of fruit should be sprayed evenly and thoughtfully. if there are insect pests, insecticides should be added, and the bags should be bagged after the solution is dried, and white paper bags can be selected. It can be harvested and stored with bags.

7. Disease control

Strengthen management, cultivate strong trees, enhance tree resistance, and keep orchards clean. After the grape was unearthed, the whole tree was sprayed with 3-5 degree stone sulfur mixture to reduce the source of overwintering disease. In rainy years, Bordeaux should be sprayed early to prevent diseases, and 50% carbendazim 1000 times + 50% methyl topiramate should be sprayed 1-2 times before and after flowering to prevent grape botrytis cinerea. After fruit setting, protective agents and fungicides should be used alternately according to the occurrence of the disease.

The above is the introduction of purple sweet seedless A17 planting technology. I hope it will be helpful to you.