Flame has no seeds, alias Frey has no seeds. Originally from the United States, 1983 was introduced to China. The fruit of this variety is bright red and round, with an average grain weight of 3.5g, a long cone-shaped ear, a large ear with a secondary ear, an average ear weight of 565-650g and a maximum ear weight of 920g. The flesh is hard and crisp, sweet and refreshing, the skin is thin, the flesh does not separate, the fruit does not crack, the fruit has no seeds, the soluble solid content in the facility is 20% ~ 22%, and the quality is excellent, so it is an excellent variety promoted in the facility.

(1) soil improvement and seedling planting

Before raising seedlings in greenhouse, the soil should be improved, and a ditch should be dug from the back wall 1.5m and the front roof 1.5m with a row spacing of 2.5 ~ 3.0m After the planting ditch is determined, the ditch should be dug with a depth of 80 cm and a width of 60 cm, and more organic fertilizer should be applied in the ditch. Two rows are planted in the east-west direction, with the row spacing of 3.0 ~ 3.5m and the plant spacing of 1 ~ 2m. It can be planted when the temperature in the greenhouse is stable above 65438 00℃ in the middle and late February of each year, or when the temperature of 20 cm soil reaches 5 ~ 8℃. According to the requirements of plant spacing, the planting holes with depth, width and length of 40 cm are dug in the planting ditch. The topsoil and subsoil are stacked separately, and the soil in the pit is piled into steamed bread. After pruning the roots of seedlings, spread them around, put the middle of the roots on the top of steamed bread, and then fill the soil to prevent the seedlings from being planted too deep or too shallow, and the roots and necks of seedlings are flush with the ground.

(2) Temperature control

① Germination acceleration period. After natural dormancy, the heat preservation began to be uncovered, and the temperature was increased to accelerate germination. After the sun rises in the first three days, open 1/3 quilt, open 2/3 quilt in the last three days, and then open them all to avoid strong light stimulating the bud eyes. Because the outside temperature is low at this stage, it is necessary to uncover the insulation quilt after sunrise and cover it before sunset every day. After the quilt was uncovered, the temperature in the greenhouse was kept at 13 ~ 15℃ during the day and 4 ~ 7℃ at night in the first week. In the second week, the daytime temperature is 15 ~ 18℃ and the nighttime temperature is 7 ~10℃; In the third week, the daytime temperature 18 ~ 20℃ and the nighttime temperature 10 ~ 15℃. At this temperature, the roots begin to move and germinate in about 30 days.

② New shoot growth period. In this period, when new buds grow and flower organs differentiate, it is necessary to control the temperature to prevent excessive growth of new buds and promote full differentiation of flower organs. The daytime temperature should be controlled at 25 ~ 28℃, and the nighttime temperature should be 15 ~ 18℃. At this time, the outside temperature begins to rise, which can release air from the bottom of the greenhouse and reduce the indoor temperature.

③ flowering period. The flowering period of grapes is very sensitive to temperature, which directly affects the fruit setting rate of grapes. High temperature above 35℃ leads to falling flowers and fruits. In order to ensure normal pollination and improve fruit setting rate, the daytime temperature should be kept at 25 ~ 28℃ and the nighttime temperature should be 16 ~ 18℃.

(4) fruit expansion period to maturity. After the end of flowering and fruit-setting expansion period, the temperature should be raised appropriately to promote the rapid expansion of fruit grains. Keep the daytime temperature at 30 ~ 35℃ and the nighttime temperature at 20 ~ 22℃, and pay attention to ventilation. During this period, the outside temperature is high, so we should pay attention to prevent bad weather such as strong wind, and at the same time, we should take proper wind protection at night.

⑤ dormant period. Using artificial hypnosis technology, the grapes quickly entered the dormant state. That is, before the frost comes every year, the greenhouse film is buckled, and the quilt is covered immediately after the greenhouse film is buckled to prevent the vines from turning green. In the early stage of the shed, the quilt was covered during the day and uncovered at night, so that the room temperature would drop. After the room temperature stabilized at 7.2℃, the quilt would not be uncovered. The flame seedless grape can safely pass the dormancy period of 730 hours at 0 ~ 7.2℃.

(3) shaping and pruning

① Plastic surgery. H-shaped pruning is adopted. The height of the southern end of the frame surface is 1.5m, and the height of the northern end is1.8m. The whole frame surface is slightly inclined horizontally. The spacing between the columns is 4 meters. 1 steel pipes or ring beams are placed at the top of two rows of columns along the north-south direction, supported by iron wires, and four rows of 12 iron wires are horizontally pulled on the frame surface. That is, 1 trunk, with 2 main vines and 4 lateral vines, with a distance of 2m between trunks and 0.5m between lateral vines, of which 2 lateral vines extend northward and the other 2 main vines extend southward. Results The distance between mother branches was 0.2. Eighty plants were planted in a greenhouse, and as a result, two buds were left on the mother branches for pruning. In this way, the first year of planting, the second year of fruiting, that is, the two years of basic forming, when the raisins grow to the height of the shelf surface, they are pitted to form two main vines, which are tied to the iron wires on both sides. When the two main vines grow to 0.5 meters, re-coring to form four lateral vines. The spacing of fruiting branches on the lateral vine is 0.2 meters, and adjacent fruiting branches lead in the opposite direction.

2 pruning. When the new buds grow to about 20 cm in the year when the seedlings are planted, the secondary buds growing from the leaf axils should be erased, and a new bud with good growth should be used as the main vine, and the vine should be hung with hemp rope or other auxiliary materials to promote growth. After the grape enters the fruiting stage, the fruiting mother branch leaves 1 vegetative branch every 20 cm, and other secondary branches are smoothed. When the new shoots grow to 80 cm in the year of seedling planting, core picking promotes the new shoots to thicken and mature as the main vine. 4 ~ 6 leaves are left on the upper part of the fruit ear for coring. Nutritive branches were coring 8 pieces, fruiting branches and top branches of vegetative branches 1 ~ 2 times were coring 3 pieces for the first time and 1 ~ 2 pieces for the second time. In September after fruiting, leave 1 ~ 2 bud shears at the base of vegetative branches and preparatory branches, and cut them off to form fruiting mother branches. After the buds germinate, the fruiting mother branch with two buds remains. If there is no inflorescence on the sprouted branch, the branch is removed, leaving another branch with inflorescence. If there is an inflorescence on the branch near the base, keep this branch and remove the top branch.

(4) the use of gibberellin

In protected cultivation, growth regulators should be sprayed on flame seedless grapes before flowering and during fruit setting to prolong the ear, enlarge the fruit grains and improve the quality. 7 ~ 10 days before flowering, when the inflorescence 10 ~ 12 cm, spray the inflorescence with 60 mg/kg gibberellin solution; The second time, in the fruit-setting stage, the above chemicals were sprayed when mung beans were young, and the suitable concentration was 50 mg/kg. Due to the uneven temperature and germination in the facility, the flowering period is also inconsistent. Therefore, in the process of spraying gibberellin, if the inflorescence elongation effect is not obvious or the fruit grain expansion is uneven, gibberellin should be sprayed at an appropriate concentration.

(5) Water and fertilizer management

No topdressing is required for the first three times of irrigation, and topdressing is required for every 1 time 1 time when the seedlings grow to 60 cm in height for the fourth time. Dig a pit or ditch with a depth of 10 cm at a distance of 20 cm from the root neck of the plant, and mix urea and diammonium phosphate at a ratio of 2: 1, and topdressing each plant is about 30 grams to promote growth. Irrigation 10 ~ 12 times in the whole growth period. In the year of seedling raising, because the soil has been improved before planting and the seedlings are small, no base fertilizer can be applied. For perennial grapes, generally in the first half of September, 30 m3 high-quality decomposed organic fertilizer is applied per hectare. The method is to dig a fertilization ditch with a width of 40 cm and a depth of 40 cm 50 cm away from the root neck of the plant. After the application of base fertilizer, water should be poured once, and winter irrigation should also be fully irrigated. In the second year, after lifting the quilt and starting to heat up, irrigate with budding water 1 time, but not topdressing. From grape germination to flowering, irrigation is divided into two times according to soil moisture, and urea and diammonium phosphate are mixed in the ratio of 2∶ 1 for each irrigation, and each grape is topdressing 25 ~ 30g. During fruit setting and young fruit development, there should be sufficient water and fertilizer supply to fully provide nutrients needed for new shoot growth, fruit grain expansion and flower bud differentiation. When berries turn ripe, irrigation should be controlled and potash fertilizer should be applied to promote grape ripening. Irrigation * * * 10 ~ 12 times during the whole growth period.