As the walnut trees enter the aging period, the growth of peripheral branches weakens and the branchlets dry up severely. Peripheral branches drooped, resulting in a large amount of "slightly coke" while emitting a large number of leggy branches, and the phenomenon of natural renewal occurred, and the yield also decreased significantly. In order to extend the age of the results, the aging tree is updated and rejuvenated. First of all, weeds out the dead branches of the pests, densely ineffective shoots, retracted peripheral stems, and promoted the emergence of new shoots. Second, we must make full use of all available legacies to restore the tree as soon as possible so that it can continue to produce results. In the case of severely aging trees, a major update is required, that is, 1/2-2/5 of the aging part is cut off on the main branch to ensure that the new branch is reissued at one time and the canopy is reappeared in 3 years. There are three kinds of specific pruning methods: (1) The trunk update saw all the main poles off, causing them to reissue the branches and form the main branch. (b) The main branch is retracted at the appropriate site of the main branch to make it a ready-made side branch. (c) Side branch renewal The first side branch was retracted at the appropriate site to form a new secondary side branch. Its advantages are that the new canopy formation and production increase are faster.
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.ahualynbios.com