How to manage the jujube flowering period:
Step 1 First, jujube tree flowering topdressing: generally carried out in late May, topdressing with quick-acting nitrogen fertilizer and appropriate amount of phosphate fertilizer, generally 0.5 kg of urea and 0.5 kg of ammonium dihydrogen phosphate per plant. After the fertilization, the water is poured in time and the soil is protected.
How to manage the jujube flowering period?
Step 2: The opening of jujube trees: Generally, it is carried out during the flowering period of jujube (in mid-June), that is, when the flowering amount accounts for 30% to 50% of the total number of flower buds, and the young tree is promoted. The tree that was first opened was carried out on the trunk 20 to 30 cm from the ground. Afterwards, the armored part was moved upward by 5 to 10 cm per year. When the first main branch was reached, the above operation was repeated, and the width of the mouth was 0.3 to 0.6. Centimeter is suitable.
The width of the armor is strong and the tree should be narrow. When the flowering period is rainy, it can be appropriately widened by 0.1 to 0.2 cm, but the width should not exceed 1 cm. After opening the nail, you should pay attention to the protection of the mouth. Every 1 week or so, apply a 100-200 times solution of the insects in the mouth. The mouth of the healing process is smoothed with mud, which is both insect-proof and moisturizing, which is beneficial to the healing of the mouth. Kaijia can also use the new technology to promote Huahua 2, the use period is the first time when the jujube flower is about 20%, and the second time after 30 to 35 days.
Step 3: Topping the new shoots of jujube: From mid-May to late June, the branches and secondary branches of the new jujube heads that do not make the backbone branches are topped in time to control the growth of the developmental branches, reduce nutrient consumption, and increase the fruit set rate.
Generally, the new jujube tree grows to 2 to 6 secondary branches, and the second branch grows with the topping. The 3 to 4 secondary branches of the base of the jujube grow to 5 to 7 knots. 1 to 4 secondary branches grow to 3 to 5 knots.
The degree of topping depends on the growth of the jujube head and the size of the space in which it is located. Generally, the weak branches are used to pick the heart, the strong branches are lightly picked, and when the space is large, the heart is lightly picked, and the space is re-picking. In addition to the heart in this period, the jujube head that has just been germinated and has no use value should be erased from the base as soon as possible, and the perennial branches that are too dense in the inner part should be removed to save nutrients and facilitate ventilation and light transmission.
Step 4: Three sprays of jujube flowering period: First, spray fertilizer, spraying fertilizer is carried out in the flowering period of jujube, spraying 2~3 times of 0.3% urea + 0.1%-0.3% of dihydrogen phosphate in continuous leaf surface every half month. A mixed aqueous solution of potassium + 0.2% to 0.3% borax. Choose sunny morning or evening spray, especially in the evening spray, the amount of spray fertilizer is the degree of wetness of the foliage, if it rains after spraying, it should be sprayed in time.
The second is to spray water, choose to open 60% of the flowers during the flowering period, the best time in the evening, spray the water evenly on the jujube with a sprayer, soak the leaves with water. The number of water sprays depends on the degree of drought. It is sprayed every 3 to 5 days in a typical year, even 2 to 3 times, and can be sprayed 3 to 5 times in severe drought years
The third is to spray the plant growth regulator, in the early flowering period to the full bloom period of the jujube tree, choose 15 to 20 mg / liter of gibberellin solution or 15 ~ 20 mg / liter of naphthalene acetic acid or sodium naphthalene acetate dilution in sunny morning or evening or 5 to 10 mg/L of 2,4-D1~2 times, 30-60 mg/L of Tsai acetic acid or 30 mg/L of 2,4-D twice (interval 20 days) during the young fruit period Prevent it from falling and falling.
Step 5: Pest control of jujube trees: The pests and diseases that harm the jujube in the flowering period mainly include green-scarred elephants, beetles, red spiders, peaches, heartworms, jujubes, and rust. Before and after wheat harvest, it is the best period for controlling red spider. It can spray 1% Qishen 5000 times liquid or 15% broom net cream 2500 times liquid.
Mid-May and mid-June are the key period for the prevention and control of the second generation of green-scarred elephants. Spraying 1 or 2 times of 20% of the weeds and crops on the trees and under the trees, or 20% cyanoamyl ester 2000 times liquid + 10% imidacloprid 3000 times liquid, can also hang black light to trap adult.
In the middle of June, the peach small heartworm trap was hoisted, and the powder was blasted at a speed of 5 to 7 days after the peach moth was reached.
In the middle of July and mid-August, spray a fungicide (200-240 times the amount of Bordeaux mixture and 50% carbendazim WP 800 times, 70% methyl thiophanate WP 1000 times) Prevent jujube rust and fruit diseases.
Step 6. It is advisable to put the bee box at a flowering distance of about 300 meters. During the bee-keeping period, it is strictly forbidden to spray pesticides such as carbaryl and pyrethroid which are harmful to bees.
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