Method for breeding aloe seedlings

Although aloe vera can also be flowered and seeded, in addition to cultivating new aloe varieties, artificial hybrids and sexual reproduction are generally used for cutting propagation, that is, vegetative propagation. Since vegetative propagation is fast and varieties have excellent characteristics that can be stably maintained, agroponics can be propagated using clonal propagation methods regardless of home planting or large-scale industrial plantation operations. Asexual reproduction is currently the most commonly used method in the breeding of aloe varieties, using the vegetative organs or asexual organs (such as roots, suckers, collaterals, terminal buds, etc.) of aloe to reproduce. Individuals of the new aloe species that are bred will continue to grow and develop on the basis of the mother's developmental stage, and they will maintain various genetic properties of the mother. The reason that vegetative propagation can maintain the genetic characteristics of the maternal body is that during the breeding process, there is no other heterogeneous genetic material involved in the process, not through the process of pollination and insemination, which is the process of reproduction of the maternal cell's genetic material. By mitosis of the cell, the chromosome system in the daughter cell maintains a high degree of consistency with the maternal cell both qualitatively and quantitatively. The growth of aloe plants is completely dependent on cell division at specific growth points. These growth points are distributed in the apical shoot tips, leaf axils, root tips, cambium, and callus formed in the wounded part of the plant and can also undergo mitosis to form new ones. Nutrient organ growth point. Separated from the new growing point to form a new plant of aloe, this is the physiological basis for asexual reproduction of aloe. Both the lower end of the main stem and the lower branch of the aloe have the ability to produce adventitious roots. After the cutting, the roots of the new aloe plant can be formed. In addition to the apical growth point and lateral growth point, the ability to generate adventitious shoots can be established between the root and the nodes of the stem, thereby growing new branches, and also as a breeding material for aloe breeding and cuttings, performing large-scale Asexual reproduction, production of aloe seedlings. The main breeding methods of Aloe seedlings are as follows: 1. Dividing, breeding, breeding, and breeding are the main breeding methods of Aloe. By artificial means, the young plants of Aloe are separated from the mother and planted separately to form a new plant of Aloe vera that lives independently. The division and reproduction can be carried out in the whole growth period of aloe, but the temperature conditions in the spring and autumn seasons are the most suitable. The new seedlings of Aloe vera, which are grown in spring and autumn, are faster and easier to survive. As long as the bed is well ventilated, the aloe seedlings can grow quickly. In the process of division and reproduction, specific methods can be used in two ways. One is to grow from the sucker of the stem or root of the aloe, and the young plant with the young root is peeled off directly from the mother and then transplanted to a nursery or a production field. Another method is to separate seedlings sprouting from the mother plant with the parent strain using a ramet cutter, but do not set aside, leaving the seedlings in place, allowing them to grow for a period of time (generally about half a month), forming an independent The roots of the plants were fully self-supporting. The seedlings were then transplanted with soil, planted in the field, and planted in a timely manner. If the color of the aloe seedlings is cut off and then transplanted with soil, there is basically no “sustained seedling period”. Aloe vera seedlings grow fast, can be carried out at any time in spring, summer and autumn, but it is more laborious. 2. Cutting propagation Cutting propagation is also a method commonly used in the thorough breeding of aloe. The difference between cutting propagation and division breeding is that the division and reproduction is to separate the rooted and intact aloe seedling plants from the mother and reproduce them. . However, cutting propagation is the use of the characteristics of adventitious roots in the lower stems of the main stem and lateral branches of Aloe vera without roots to separate and propagate new plants of aloe, which is particularly suitable for aloe species and varieties with developed branching and easy elongation of stem sections. After removing the apical buds, the lateral buds develop rapidly and many of the grown branches can be used as cutting propagation material. The cuttings of aloe are mainly stem cuttings and root cuttings, while the leaf cuttings are difficult to succeed. Aloe cuttings can be carried out on the open ground or in a greenhouse shelter or greenhouse. Open field cuttings can be used to open ground beds for large numbers of breeding. Depending on the season, measures such as plastic cover protection or arbour shading can be appropriately adopted to promote rooting and adventitious shoot formation in aloe shoots to increase the survival rate of cutting seedlings. Environmental factors have a close relationship with the survival of aloe vera cuttings and hair growth, and are briefly described as follows: (1) Temperature: Aloe vera is a plant that originates in the tropics. Generally, the suitable cutting temperature is 25~~28°C. If the substrate temperature is slightly higher than the temperature by 2–4°C, it is more suitable for rooting and survival of aloe cutting seedlings. (2) Humidity: Aloe roots need suitable soil moisture. Generally, the maximum water holding capacity of soil in the field is in the range of 50% to 60%. Excessive soil moisture will cause insufficient air in the soil and rot in the cutting. (3) Illumination: The aloe vera cuttings have leaves, which can carry out photosynthesis and various physiological activities, and can transport synthetic auxin down and accelerate the rooting of the lower healing wound. (4) Oxygen: Breathing is enhanced when a new root of wound healing occurs in the aloe vera cutting end. Therefore, it is required that the cutting substrate has good air permeability, so as to ensure the oxygen requirement of the aloe vera cutting in the rooting process. (5) PH value: Aloe vera cuttings are generally easy to take root in the medium between pH 6.5-7.2, when the PH value is acid and alkaline, it is not conducive to the rooting of aloe vera, for the acid soil, Lime can be used to improve seedlings before nursery.

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