Dongzao nail-opening time: Although Dongzao nail-opening can improve fruit setting rate, it also has the side effects of inhibiting root growth and tree vigor. Therefore, young jujube trees with small crowns, unshaped trunk branches, and thin trunks cannot be nailed prematurely.
The diameter of the trunk of a nail-opening tree should generally be more than 10cm. Under the condition of dense planting and high-fertilization water, the trunk of the trunk can be opened for trees older than 4 years and with a diameter of 6cm or more. Weak trees and young trees under 4 years old are strictly forbidden to open. The most suitable period for winter jujube tree to open armor is the early flowering period (before and after the awning), that is, when most jujubes of the whole tree are opened with 5-8 flowers, and the flowering volume accounts for 3o% of the total buds.
How to open armor: Open armor is usually carried out on the main trunk. You can also open armor at the base when the branches are too busy. The first nail-opening should be carried out on the smooth part of the trunk about 20cm from the ground. Afterwards, the nail-opening should be carried out once a year at 3-5cm above the nail opening of the previous year, directly to the branch of the main branch, and then nail-opening from the base upward Return to the nail, the nail mouth generally does not overlap). Last year, when armor was weakened, the armor should be stopped and the tree should be stopped. When opening the nail, first shave the old bark of the nail-opening part with the flail hook to expose the pink phloem tissue, and then use the nail-opening knife ring to cut two knives, generally O.51cm wide up to the xylem, remove the ring cut after opening Tissue between the phloem.
After opening the nail, wrap the nail mouth with a plastic strip to make it in a good small environment, and generate callus as soon as possible, while avoiding the accumulation of rain and medicine.
When the head reaches the length requirement, the topping is performed. The method of topping:
â‘ Cultivate the jujube head of the large fruiting branch group, and remove the heart when there are 4-7 secondary branches, and remove the edge when the secondary branches are about 6 nodes.
â‘¡Cultivate the jujube head of the small and medium-sized fruiting branches group, and remove the heart when there are 3 to 5 secondary branches.
â‘¢ For the new jujube heads that do not use the fruiting branches and backbone branches, the sooner the topping is performed, the better. Generally, 2 to 3 dates are lifted and the tops are removed.
Pulling the jujube head after erect growth and topping, it was pulled into a horizontal state at the beginning of June (before flowering), inhibiting the formation of auxin at the top of the branch, controlling the growth and accumulation of nutrients, promoting the differentiation of flower buds and increasing the fruit setting rate. If the tree is crowned or lacks branches on one side, the branches can be used to adjust the shape of the tree to enlarge the result. In early May, the overdense new jujube heads germinated by the backbone branches and fruiting branches at all levels should be removed from the base if they are not cultivated with long branches and fruiting branches.
Wiping buds can save nutrients and enhance tree vigor, which is beneficial to increase fruit setting rate. When the relative humidity of the air is lower than 60% during the flowering period, the germination rate of pollen will be significantly reduced. The best time to spray water is in the evening, and the worst effect around noon. The frequency of water spraying is generally 2-3 times (interval of 3-5 days). In severe drought, the number of water spraying can be increased appropriately.
Ring cutting is carried out on young trees that are not suitable for armoring. When the tree vigor is strong, the ring is cut twice, and when the tree is weak, the ring is cut once. The most suitable period for ring cutting is the flowering period. Topping the date head Topping the newly-produced date head, breaking the growth polarity of the shoot tip (the stem tip contains more auxin), inhibiting the excessive growth of the date head and allowing more nutrients to flow to the flower organs to promote fruit setting. The topping of jujube heads is carried out in batches from early May to the end of July, and spraying plant growth regulators during flowering can increase the fruit setting rate by 20%. The use of rare earth elements in the bud stage, flowering stage, and young fruit stage of the winter jujube tree can not only increase the fruit setting rate of winter jujube, but also increase the chlorophyll content of the leaves, thereby improving the disease resistance of the tree (scorched leaf disease, rust), and insect resistance (jujube leaf Tick, Starscream) ability.
Doing the above management well at the flowering date of the jujube tree can effectively increase the fruit setting rate, thereby increasing the output of winter jujube.
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|
Product Model: |
JX40 |
|
Accuracy: |
±1.5mm (0.06 inch) |
|
Measuring Unit: |
metre/inch/feet |
|
Measuring Range: |
0.03~40m (0.01 to 131 ft) |
|
Measuring Time: |
0.1~4 seconds |
|
Laser Class: |
Class II |
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Laser Type: |
635nm, <1mW |
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Waterproof & Dustproof : |
IP54 |
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Auto Laser Off: |
60 seconds |
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Automatic Power-off: |
480 seconds(8 minutes) |
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Lighting: |
white LED |
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Datum Option: |
Can choose Front edge or end piece edge as datum |
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Y |
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Signal Strength Display: |
Y |
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LCD display: |
2 inch large screen |
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Display illumination and multi-line display: |
Max 2 displays |
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Data Memory: |
Y (allow 20 values) |
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Backlight display: |
Y |
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Continuous Measurement: |
Y |
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Min/max Measurement: |
Y |
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Addition/Subtraction(Distance/Area/Volume): |
Y |
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Area/Volume/Pythagoras Measurement: |
Y |
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AAA alkaline battery(2*1.5v ) |
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Weight: |
about 80g |
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Dimensions(L*W*H): |
4*2*11.5cm |
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Auto correction and error report technology: |
Y |
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Operating Temperature: |
0-40 ℃(32-104 ℉ ) |
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Storage Temperature: |
-20~60 ℃ (-4~140 ℉) |
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