Asexual propagation of Chisan

The deciduous trees of Taxodium var. chinensis, which are more resistant to water and humidity, are not easy to age, have a beautiful tree shape, grow rapidly, have strong wind resistance, and have few pests and diseases, are suitable for use along rivers and beaches, as well as on both sides of highways and railways. Afforestation and greening are favored by people in the middle and lower reaches of the Yangtze River and even in the vast areas of southern Henan. However, in recent years, due to the impact of abnormal climate on seeds, the seedling propagation germination rate of Chisan is low. At the Jigongshan Railway Forest Farm at the foot of Jigong Mountain in Henan Province, under the guidance of the technicians, the breeding of Sassafras tsugae is mainly for cutting propagation of Sassafras tsugae, and the success is achieved. The specific methods are as follows:

First, tender shoots from June to August, in the middle and young trees, select the side branches that germinate in the year, cut into 10 cm to 12 cm cuttings, leaving 3 to 5 leaves in the upper leaves, using sandy loam as a substrate to 5 cm Ten centimeters of rows are inserted into the seedbed and shaded to keep the bed moist. Generally, the roots can be healed in mid-to late September.

Second, hard-branch cutting March to April, from 1 to 2 years old seedlings on the cuttings, after cutting, cut into 10 cm to 12 cm cuttings, with sandy loam soil as a substrate to 5 cm 20 cm strain Line spacing inserted in the seedbed, often keep the bed moist, cuttings can heal from June to July, the survival rate of more than 80%.

Third, the relevant technical requirements in the hardwood cuttings, cuttings are directly related to the quality of seedlings and the quality of seedlings. Practice has proved that the average survival rate of cuttings taken from seedlings or cuttings from 1 year to 2 years is above 80%. Cuttings from branches cut from mother trees older than 3 years are used for cuttings, and the average survival rate is greatly reduced. In addition, the survival rate of hardwood cuttings is related to the age of the mother tree, but also closely related to the site of the cutting. The base of the branches is the best, the middle is the second, and the tip is the worst.

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