Carbomer is an acrylic resin obtained by cross-linking pentaerythritol with acrylic acid. It is a very important rheological regulator. After neutralization, carbomer is an excellent gel matrix, which has important applications such as thickening suspension. According to the dry product calculation, including carboxylic acid group (-cooh) should be 56.0 % ~ 68.0%.
Common carbopol series include: Carbopol 940, 941, 934, 1342, 980, ETD 2020, AQUA sf-1, Ultrez 21, Ultrez 20, etc.
Carbomer,Carbopol,Carbopol 940, Carbomer 940, Carbomer 980, acrylic acid Xi'an Gawen Biotechnology Co., Ltd , https://www.ahualyn-bios.com
Tree age selection
Grafting walnut trees generally choose 5-15 years old, low dry, small crown, growing vigorous tree. At the same time, saplings below 30 cm in diameter and below can be replanted. If it is a weak tree, it is necessary to strengthen the management of the rejuvenation of the tree before grafting.
Scissor scion
Scion should be taken from the mid-segment or base segment of a fruiting tree with excellent varieties, robust growth, and no pests, with a diameter of 1 cm or more and a small and smooth pith. The ear cutting time is appropriate after falling to mid-February. Each scion retains 3 full shoots, is sealed with paraffin, 50 or 100 varieties are tied, wetted with wet sand or wet sawdust, thickness 15-20 cm, and stored at a temperature of about 10 degrees Celsius .
Grafting
The time for high walnut varieties to be replaced should generally be controlled when the buds are sprouting or when the leaves begin to bloom. Northern Sichuan usually can be grafted from mid-March to mid-April.
Injury flow control
7 days before grafting, saw the joints according to the original tree crown affiliation. The saw head should be 20-30 cm from the base. At the same time, at the base of the trunk 20-30 cm from the ground, spiral drilling 2-3 mouth, the depth of the main stem diameter of one-fifth to one-seventh, in order to facilitate the flow out of injury. If there is too much injury, you can also saw 1-2 wound mouths at the base of the joint.
Grafting techniques
Plug the skin. The scion is not peeled, and the rootstock interface diameter 3-12 cm is mainly used this method.
Plug the tongue to connect. Scion peeling, the diameter of the rootstock interface 3-12 cm mainly use this method. When grafting, the rootstock is sawn again to dry layer, then the rootstock outer surface is cut off with a long tongue. The scion cuts and grows 5-6cm tongue-type noodles, and squeezes off the cortex and xylem of the tongue part by hand, and then the xylem tongue part Insert the between the cortex and the xylem on the side of the rootstock section, and apply the lingual skin layer of the scion on the tongue-shaped noodles of the rootstock skin. Finally, tightly bind it with a plastic tie.
Double tongue connection. Rootstock interface diameter of 3 cm or less.
Embed the nailing method. The rootstock is too thick and the bast is too thick to be grafted by this method.
Wound protection
After the scion is fixed, the interface should be moisturized. Generally, the grafting interface and the scion are all grafted with grafting tape, wax or plastic bag. The plastic bag should be 4-5 cm higher than the top of the scion and the gas should be excluded to facilitate scion germination. Tip. Use a newspaper cover over and around the plastic bag to facilitate Moisturizing and moisturizing the shade and promote wound healing.
After management
Exhale. After grafting, the scion begins to sprout, and when the leaf is spread, the leaf is observed every 2-3 days. For the leaf, the top of the plastic bag can be opened to make the tip of the tender shoot stick out. The upper air outlet is small to large and cannot be opened at one time. It is also not possible to remove the plastic bag too soon.
In addition to Meng. Timely removal of the sprouts of the rootstock, if the joint is not alive, can retain 2-3 germination branches in the appropriate parts, and then make up.
Anti-folding. After 25-30 days, the scions germinate one after another and grow rapidly. When the scion is a little longer than 30 centimeters, it is necessary to set up the pillar at the interface in time, tie the new lightly to the pillar, and cut out the sprout on the stem at any time, and tie it 2-3 times longer with the new extension. .
Supplementary. If there are no living scions, they should be selected in a suitable position. Occurs on the anvil piles and leaves 2-3 sprouts, and budding takes place from July to August.
Loosen. After grafting for 2-3 months, loosen the interface binding material once, but do not remove it. After the end of August can be removed according to circumstances.
prune. After the walnut trees are tall, they are easy to form plexiform branches. When pruning, they should be combined with short cuts and branches to expand the canopy as quickly as possible, and to strengthen fertilizer and water management and pest control so that they can be put into production as soon as possible.
Walnut tree does not hang fruit expert prescription
Walnut trees do not bear fruit, can be solved through high-risk alternatives, and can produce good benefits. The main techniques for high grafting walnut trees are the following seven aspects: