In the case of red meat pomelo, the optimal pruning period typically falls between late November and mid-December, which is also known as the "winter solstice" period. Before the beginning of December, when the pomelo trees are being harvested slowly, the tree's vitality usually returns to normal within a week after harvest. This makes it an ideal time for quick pruning. However, after the winter solstice, the flower buds on the pomelo trees start to differentiate. If pruning is delayed beyond this point, most of the flower buds will have already formed, making the pruning less effective. This can lead to shorter flowering periods in spring, resulting in more one-time flowers and sterile blooms. Additionally, these flowers may be exposed to high temperatures, causing the phenomenon known as "flowers but no fruit." As the saying goes, "Time is money; seize the moment and follow the rhythm of the season." Therefore, the best time to prune is around mid-December, when the temperature begins to drop.
Next, regarding the timing of girdling, young trees that are just starting to bear fruit should be girdled during the "small snow" to "big snow" period. For mature, high-yielding trees or older trees, girdling is best done between the "winter solstice" and "lesser cold" periods. The purpose of girdling is to temporarily restrict the flow of carbohydrates to the flower buds before the wounds heal, which helps promote better bud development and improves the fruit set rate. Girdling is a proven technique that significantly enhances the percentage of fruits that actually set and develop.
Third, when performing major pruning, especially on young trees, it's important to graft above the main branches. For long-term fruit-bearing trees, old trees should be girdled on their branches, leaving a small shoot on each leaf without girdling. The primary goal of this practice is to maintain root health and ensure proper nutrient supply, which supports fruit size, reduces cracking, prevents the tree from becoming weak, and avoids yellowing or death of the teat leaves. Both pruning and girdling times are detailed in the traditional calendar, and I’m revisiting these points today while adding some modern techniques to enhance effectiveness.
Magnesium Fluoride CAS No. 7783-40-6
Magnesium Fluoride Basic Information
Product Name: Magnesium fluoride
CAS: 7783-40-6
MF: F2Mg
MW: 62.3
EINECS: 231-995-1
Magnesium Fluoride Chemical Properties
Melting point 1248 °C
Boiling point 2260 °C
Density 3.15 g/mL at 25 °C(lit.)
Refractive index 1.365
Form random crystals
Color White to off-white
Specific Gravity 3.15
Water Solubility 87 mg/L (18 ºC)
Blood Plus Magnesium Fluoride,Fluoride Blocks Magnesium Uptake,Fluoride Reacts With Magnesium,Magnesium Fluoride
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