Installation of apricot trees to grasp "ten tubes"

1. Rational fertilization should be based on base fertilizer and supplemented by topdressing. Most of the base fertilizer was applied from mid-September to mid-November after the autumn shoot stopped growing, applying 5000kg to 7500kg per mu. Topdressing is mainly organic fertilizer. Before sprouting, 0.1 ~ 0.15kg of nitrogen fertilizer is applied per plant, and 0.1 ~ 0.2kg of nitrogen, phosphorus and potassium compound fertilizer is applied during the fruit expansion period. In addition, foliar fertilizer is sprayed every 10 to 15 days, such as potassium dihydrogen phosphate, liguomei solution and so on. Second, timely watering before the buckle shed, after which the ground is covered with plastic film. Watering is needed before flowering, shoot growth, fruit development and after fruit harvest, but the humidity in the greenhouse should be controlled. Third, control temperature and humidity 1. Budding stage. Apricot trees are generally below 7.2 ℃, and the dormancy can be broken by 50000h low temperature. 15 days before buckling the shed, cover the plastic film first, on the one hand, it can control the humidity, on the other hand, it can maintain the ground temperature, and then buckle the shed to keep warm. After buckling the shed, the temperature was kept at 15 ℃ ~ 22 ℃ in daytime and no less than 3 ℃ at night. The humidity in the shed is controlled at 80% to 85%. two。 Flowering period. Too high or too low temperature at flowering stage will seriously affect pollination and fertilization. The daytime temperature should be kept at 15 ℃ ~ 20 ℃, the highest temperature should not exceed 23 ℃, and when the night temperature should not be lower than 7 ℃ or 5 ℃, the temperature should be heated manually. The humidity during the flowering period is controlled at 50%-60%. When it is too low, the ground is sprayed with water; when it is too high, it is necessary to release air and reduce humidity. It can't be watered a week before the flower. 3. Fruit expansion period. It is controlled at 25 ℃ ~ 30 ℃ during the day, no less than 10 ℃ at night, and the humidity is controlled at about 60%. This period can be watered. 4. Harvest time. The daytime temperature is controlled at 26 ℃ ~ 31 ℃ and the night temperature is about 10 ℃. The humidity is 50% and 60%. If the soil is not very dry during this period, it is best not to water it to prevent fruit quality decline or fruit cracking. 5. Flower bud florescence. The edge of apricot fruit can be lifted after harvest, and the temperature is about 28 ℃ during the day and 15 ℃ at night. From late June to mid-July, when the temperature exceeds 34 ℃, it is disadvantageous to apricot flower bud differentiation, which can cover with plastic film and promote flower bud differentiation. Fourth, light management apricot trees like light, and the plant height in the south should be controlled. Use non-dripping film, spray waterproof agent before using, and clean or rinse the greenhouse film in time to improve the illumination in the greenhouse. If the temperature permits, uncover the grass as early as possible and release the grass late as soon as possible, and use scattered light if there is no rain and snow in cloudy days. Fifth, plastic surgery and pruning 1. Trim it in time. Pruning in time before buckling the film, remove figs, weak branches, over-dense branches, upright long branches, in order to concentrate nutrients. two。 Wipe the buds and pick the heart. Wipe off the bud on your back in time after sprouting. Pick the heart when the new shoot grows to about 20 cm, prevent excessive growth and affect the light, alleviate the competition for nutrients between new shoot growth and fruit development, increase the fruit setting rate and increase the number of fruits. 3. Control the crown and promote the flower. After 2 times of heart extraction, 15% paclobutrazol 250 × 400 times can be sprayed for 3 times. For weak trees with more fruit, paclobutrazol is no longer needed. For apricot trees with too much nitrogen fertilizer, under the condition that the vegetative growth of apricot trees can not be controlled after the use of paclobutrazol, some roots can be cut off and summer shearing can be strengthened to control crown growth.