A: There are several reasons for this situation. First, apply nitrogen fertilizer. Partial application of nitrogen fertilizer will cause tree vigor, only long branches will not result. In addition, some farmers have applied unripe farmyard fertilizers to orchards, causing pears to grow tall, but only flowering is not a result; second, poor drainage. In the flowering period of the pear tree, there is usually too much rain. The accumulation of water in the orchard will cause the tree growth to be frustrated, thus causing less fruiting. Third, the lack of pollination trees. Pear trees belong to cross-pollination plants, and the rate of pollination within the varieties is low.
There are many kinds of plant extracts, and their main functions in skin medicines, curative cosmetics and cosmetics include: anti-irritant, anti-inflammatory, wound healing, anti-infection, sterilization, Moisturizing, skin protection, etc. Whether it is a single Plant Extract or a compound extract, its efficacy is often various, especially the clinical efficacy of compound extract is reflected in the comprehensive effect and overall effect of compound compatibility, and its efficacy is sometimes more effective than separation and purification. The efficacy of the combination of ingredients is good.
According to the dosage form, plant extracts can be divided into: essential oils, spray-dried dry powder, enzymatically hydrolyzed vegetable protein powder, pure active ingredients, dry powder of peeled fruit core, liposome-encapsulated microcapsules, polysaccharide or other polymer-encapsulated Extracts absorbed by microcapsules and porous microspheres, etc. Freshly prepared fruit or vegetable juices are also used in professional salons or home grooming. Different plant parts used in plant extracts have different active ingredients, including: roots, stems, leaves, bark, flowers, corolla, fruits, seeds and buds. This classification method is more meaningful in preparation, use, storage and transportation, and is used by some plant extract manufacturers.
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