Several factors affecting the rooting of flower cutting
Today's focus is to introduce you to the knowledge of flower propagation, several factors affecting the rooting of flower cuttings, let's take a look together.
The key to the success of cutting lies in whether the cutting can root in time to absorb water and nutrients. The type of rootstock, the genetic traits of the parent, and its rooting ability vary, and it is also greatly related to the age and growth and development status of the same parent. Even with the same parent, the rooting ability varies greatly depending on the characteristics or physiological conditions of the cutting, the collection position, the age of the cutting, the collection time, the size of the cutting, and the cutting method.
There are many factors affecting the rooting of cuttings, fundamentally, it is the difference in genetic traits. However, based on general traits, it can also be considered from several aspects:
1. Substances necessary for rooting: Through a large number of tests and analyses, it has been found that rooting inhibitory substances: It is generally believed that the cutting itself contains substances that hinder rooting, such as tannins, resins, and organic acids. These substances can weaken or prevent the action of plant hormones, and these substances also remain on the cut surface, affecting the water absorption of the cutting, thus reducing the rooting ability. Soaking the base of the cutting in alcohol or hot water can enhance the rooting effect to a certain extent.
2. Drying and rotting of cuttings: The withering of cuttings seriously affects rooting, leading to the failure of cutting, and the main cause of withering is drought and rot. Drought is caused by excessive evaporation due to the cutting being too dry during transportation or cutting processing or after cutting. This can cause severe water deficiency in the cutting, severely damaging the rooting activity of the cutting, and even causing it to wither. Therefore, it is necessary to strengthen the management of the moisture conditions of the cutting bed, reduce the transpiration area, or take shading measures to reduce the transpiration intensity, prevent withering, and ensure the survival of the cutting.
Rot is caused by the infection of pathogenic bacteria at the base of the cutting. After rotting, the cutting cannot absorb water or loses its metabolic ability and dies. Therefore, it is necessary to strengthen the protection of the cut surface and消毒 the cutting bed matrix, which is very effective in preventing rot and improving the survival rate of cuttings. It is very important to select appropriate cutting bed materials for cuttings that are prone to rot. Soils with little or no organic matter can prevent rot to some extent. For fleshy plants that are prone to rot, such as cacti, they should be placed in a shady and dry place before cutting, and the cutting should be done after the cut surface has healed to achieve good results. Therefore, during cutting, attention should be paid to prevent withering caused by drought or rot, create good cutting bed conditions and other environmental conditions, and try to promote early rooting of cuttings and shorten the dangerous period before rooting.
3. Age and maturity of cuttings: It has been found that it is difficult for cuttings taken from older trees to survive, while using young trees or branches that have sprouted from the trunk is easier to survive. For example, the rooting rate of oleander cuttings from one-year-old young branches reaches 100%, while the rooting rate of two-year-old branches drops to 50%, and cuttings from branches older than three years cannot root.
Looking at the maturity of the cuttings, one-year-old branches are easier to root than branches with a higher degree of lignification in perennial branches, and the current year's new shoots are easier to root than one-year-old branches. For example, cutting of Biotao one-year-old branches cannot be planted, but using semi-lignified branches cut in autumn can survive. The reason is that tender branches have strong vitality, easily produce new plant initials, and form adventitious roots. This is also inseparable from the role of leaves, as leaves not only produce nutrients but also promote the formation of root initials and the growth of adventitious roots through the hormones they produce.
The above-mentioned small experience of the factors affecting the rooting of flower cuttings can bring green plants and flowers to help you in life!