Branching is the most commonly used method of propagation, which is usually carried out when the temperature reaches about 20 ℃ in spring.
The soil of flowerpot or seedbed shall be slightly acid soil with rich humus, generally mixed with rotten leaf soil and peat soil in equal amount; it can also be mixed with pond mud, peat and perlite in the proportion of 2:3:1; or it can be mixed with loose rotten leaf soil with rich organic matter plus 1 /3 perlite and a small amount of base fertilizer.
First, cut the root block with stem and leaf or leaf bud with a sharp edge. If it's for home breeding and the quantity demand is small, the cut root block with stem and leaf and leaf bud can be directly placed in the flowerpot; if it's for mass breeding, it's placed in the seedbed.
To keep the ambient temperature at 20 ℃ - 28 ℃ and relative humidity above 80%, if the temperature and humidity can not reach, it is necessary to cover a film on the flowerpot or seedbed.
Cutting is generally carried out when the temperature is not lower than 20 ℃, and can be carried out in any season.
The cutting of the double line taro usually uses the top young shoots. The cutting length of the cuttings should be 10-15cm. If the leaves grow vigorously, one third of the leaves need to be preserved. If the leaves grow weakly and are relatively small, one half of the leaves need to be preserved.
Before cutting, the cuttings were soaked in 500 ppm NAA solution for 2-3 seconds, or treated with indoleacetic acid, indobutyric acid and ABT rooting powder.
After the treatment, the cuttings were inserted into the seedbed or flowerpot obliquely. If they were propagated in large quantities, the plant row spacing of the double line taro should be about & nbsp; 5 × 10 cm, so as to ensure the normal growth of the plant.
After cutting, it is covered with film. The temperature is controlled at 20 ℃ - 30 ℃, and the relative humidity of air is 75% - 85%.
The survival rate of cuttage is lower than that of plant propagation, about 50%, so it's better to adopt the branch propagation method in general family cultivation.
