Spring is the golden season for planting fruit trees. To ensure that farmers buy quality fruit saplings and learn more about purchasing fruit saplings, experts from the Zhengzhou Fruit Research Institute of the Chinese Academy of Agricultural Sciences separately introduced the issues that should be paid attention to when purchasing saplings. The characteristics that should be possessed by high-quality fruit seedlings for the reference of fruit farmers. After fruit trees are planted, it usually takes 3 to 5 years to see the benefits. If they are purchased improperly, they will be wrong for several years. Therefore, before purchasing fruit saplings, consider the main cultivars of fruit trees, market sales, appropriate cultivation areas for each tree species and variety, and then determine the cultivated species in combination with their own land conditions. To purchase regular nursery stock scientific research units to cultivate high-quality seedlings. apple Note stock types and seedlings specifications Pay attention to the types of rootstocks. Do not purchase co-stocks (using apple seeds as seed for the cultivation of apple rootstocks). The quality of the basestocks and interstocks should be high. The jellyfish or wild apples should be used as the basestock. M26 should be the main stock for the dwarfing plants. Note that seedlings of high quality apple seedlings must have more lateral roots and fibrous roots, and the lateral roots should grow and distribute evenly, not too little or on one side. Note grafted apple seedlings grafted degree, the interface must heal firmly. Pay attention to diseases and insect pests. Seedlings with mosaic disease, rust disease, root rot, and various viral diseases cannot be purchased. grape Pay attention to the seedling breeding methods There are many varieties of grapes, and the quality of seedlings varies greatly. When purchasing grape seedlings, we must pay attention to the seedlings' purity, breeding methods, robustness and freshness. At present, there are many ways to propagate grape seedlings, including cutting seedlings, grafted seedlings, and nutritional seedlings. The seedlings propagated by different breeding methods have different quality requirements. Hardwood cutting seedlings, after one year of growth and management, the second year of planting can generally bear fruit, but to prevent the purchase of "freezing seedlings." When buying a grafted seedling, it is important to understand the type of rootstock used and the grafting time. Nutritional seedlings were seedlings that had been bred with green branches during the year. Normally, the fruit was only fruited in the third year after planting. When buying, it was necessary to take care of the use of hard seedling cuttings and seedlings that had been transplanted with green shoots. When the seedlings are purchased, it is best to raise the seedlings on site to prevent the seedlings from losing water due to the long time of seedling raising and affect the survival rate. For well-established seedlings, it must be checked whether there is water loss or root and mold decay. walnut Selected grafted seedlings do not choose seedlings At present, there are many fake walnut seedlings grafted on the market. Therefore, the following points must be paid attention to when buying fruit seedlings: To select walnut seedlings generally have relatively complete root system, high survival rate after planting, then can germinate 2 to 3 new branches of 0.5 to 1 meters long to form a tree-shaped standard walnut tree. The large seedlings are difficult to raise, they cannot guarantee the integrity of the root system, and the survival rate after planting is low. Lateral root growth in the year was only about 15 cm. To select the grafted seedlings, the seedling grafted seedlings that are not selected are a formed finished seedling that does not require grafting after planting. The live seedlings need to be grafted after being planted. Buy grafted walnut seedlings must go to the formal scientific research units to buy. Potassium Fluoride CAS No.7789-23-3 Potassium Fluoride Basic Information Potassium Fluoride,Potassium Fluoride Hydrolysis,Potassium Fluoride Phase,Potassium Fluoride Phase ShanDong YingLang Chemical Co.,LTD , https://www.sdylhgtrade.com
Product Name: Potassium fluoride
CAS: 7789-23-3
MF: FK
MW: 58.1
EINECS: 232-151-5
Mol File: 7789-23-3.mol
Potassium Fluoride Chemical Properties
Melting point: 858 °C(lit.)
Boiling point: 1505 °C
Density: 2.48
Vapor pressure: 1.3 hPa (885 °C)
Fp: 1505°C
Storage temp.: Store at RT.
Solubility H2O: 1 M at 20 °C, clear, colorless
Form: spray-dried
Color: White
Specific Gravity: 2.481
PH: 7.0-8.5 (25℃, 1M in H2O)
Water Solubility: 92.3 g/100 mL (18 ºC)
Sensitive: Hygroscopic