Frozen water. Before freezing of the soil, about the middle or late November, irrigation of one frozen water can increase the ability of the tree to resist cold and reduce the occurrence of drawing and freezing damage. The trunk is white. Whitening agent commonly used formula: 30 parts of water, quicklime 9 parts, lime sulfur liquid stock solution 1.5 parts, salt 1.5 parts, animal and vegetable oil 0.5 parts, general tree protection 1 copies. Buried method. (1) Ground-buried method. Gently press the tree over the antegrade level and place it on the ground, bundle it with a straw rope, and directly cover the soil. The thickness should be 40cm. (2) Underground soil method. To dig trenches between the rows, the size of the trench is the degree of overwhelming tree body. The main and side branches shall be bundled on the center trunk and placed in the trench to cover the soil. The soil thickness should be 20cm higher than the ground. The buried method is only suitable for saplings born from 1 to 2 years. Spray cold protection agent. Spraying new high-fat membranes and general tree maintenance can form a protective film on the surface of the tree, reduce transpiration, and improve cold resistance. In mid-February and in mid-March, the two sprayed Kaowang No. 3 once, forcing the top of the nourishment to prevent back-drawing, and the effect was remarkable. Science winter cut. Cut off part of the autumn shoot during winter cutting can reduce the evaporation of water, improve the anti-freezing and drought-resistance ability of the shoots, and prevent the big green leafhoppers from spawning on the branches to avoid drawing. Trimming wounds should be promptly smeared with anti-corrosion film to protect the growth of wound healing tissue and prevent infection from the wound. Water Test Strips 15 Parameters Detection method:
2. Put the edge of the strip against the edge of the container to remove excess water samples;
3. Compare the test strip with the colorimetric table on the bottle label, and record the test result in the determination time: 0 ~ 60 seconds. Use visual.
Storage conditions: Water Test Strips 15 Parameters,Water Quality Test Kit,Professional Water Test Kit,Drinking Water Test Strips Changchun LYZ Technology Co., Ltd , https://www.lyzinstruments.com
visual
Operation method:
1. Visual inspection: Immerse the test area of the test paper into the fully stirred fresh drinking water, and take it out immediately;
The test paper should be stored in room temperature, dry environment, away from a variety of chemical reagent environment, avoid direct sunlight. This product does not need to be refrigerated (if it is stored for a long time, it should be restored to room temperature and opened for use).