Cutting propagation of geranium, because its stems are semi-fleshy and contain more water, often rot and affect survival. Therefore, in recent years, the author has improved it in combination with re-cutting after flowering, so that the survival rate can be obviously improved by cutting cuttings again. Specific practices are as follows:
Select thick branches on the plant, from the top down, every 4 ~ 6 true leaves, or cut a section with a length of 7 ~10 cm until the height of the plant is routinely re-cut after flowering, and divide it into several cuttings in advance. Then, at a distance of 0.5 cm below the stem node, carefully cut off or peel off the cortex with scissors, with a width of 0.2 ~ 0.4 cm, and pay attention to make the branches and leaves still stand upright on the plant as usual. In this way, a branch can form 2 ~ 4 cuttings to be cut without leaving the parent plant. Because the annular wound has a regulating effect on nutrition and hormones, after 2 ~ 3 weeks of conventional management, it can be seen that the axillary buds at the top of most cuttings below the top tip have been germinated, and the annular wound has also dried up and healed on the mother plant. At this time, it can be cut off, and then the cuttings are separated one by one, dried in a cool and ventilated place for several hours, and then cut into a pot with culture soil prepared in advance after the conjunctiva is dried on the section of the cuttings. After the insertion, water is poured enough, and if it is dry and wet in the future, it can all take root after three weeks, and the survival rate can reach 100%. Such improved cutting measures are of great practical significance for the propagation of fine varieties and short varieties of geranium and the effective use of maternal branches.
The author thinks that on the one hand, the annular cutting and peeling layer before in vitro directly reduces the semi-fleshy cross-sectional area of the cuttings, on the other hand, the most important thing is to block the polar flow direction of photosynthetic products in the leaves of the mother plant, so that precious nutrient accumulation can be formed at the base of the cuttings before cutting, or callus can be produced along the edge of the wounds, so as to prevent the wounds from being infected and promote rapid rooting, which plays an important role in their internal nutritional status.
Illustration of specific cutting process of geranium;
1 Punch some holes in the bottom of the cutting vessel.
2. Leave the cuttings for one day (in the shade) to help the wound heal.
3. Sand can be selected as the cutting substrate, and vermiculite can be used if possible, and then cut into the vessel.
4, generally can take root after half a month, transparent plastic cups can see the growth of the root system.
5, began to prepare for desanding, immersed in water, sand light leakage to take out the seedlings.
6. Then you need to transplant and plant.