The latest course on techniques and methods of raising seedlings of Chinese rose

Rose is a rose plant of the rose family, and its reproduction is divided into asexual reproduction and sexual reproduction. Sexual reproduction is mostly used to cultivate new varieties or produce rootstocks. Asexual reproduction has the methods of cutting, ramet, striping and tissue culture. Cutting propagation can not only maintain the excellent characteristics of the female parent, but also simple and easy to learn, fast reproduction and high survival rate. Let's take a look at the cutting seedling raising technology of Chinese rose.

Growth habit

Although the requirements of Chinese rose on climate and soil are not strict, it is more suitable for loam which is loose, fertile, rich in organic matter, slightly acidic and well drained. Sex likes a warm, sunny, well-ventilated environment. The optimum temperature of most varieties is 15: 26 ℃ during the day and 10: 15 ℃ at night. Dormancy occurs when the winter temperature is below 5 ℃. Some varieties can withstand the low temperature of-15 ℃ and the high temperature of 35 ℃. When the summer temperature lasts more than 30 ℃, the plant will enter semi-dormancy and grow poorly. Although it can also conceive buds, the flower petals are few, the color is dim and dull, and the ornamental value is lost.

Cutting time

The cutting of Chinese rose can be carried out in both spring and autumn, and the spring is from late April to the end of May, when the climate is mild, the branches are strong, it can take root one month after cutting, and the survival rate is high. Autumn cutting is carried out from late August to the end of October, when the cutting is greatly affected by the temperature difference between day and night, the rooting is relatively slow, it takes 40-50 days to take root, and the survival rate is slightly lower than that of spring cutting.

Seedbed preparation

The cuttage bed of Chinese rose should be selected in the place with deep soil layer, loose structure, good permeability, good drainage and air circulation, the seedling bed is 1 meter wide and 3 meters long, and the size of the seedling bed does not have much effect on the survival of the cuttings. it should be determined according to the needs, and the larger one can be selected when a large number of propagation is needed, and vice versa.

Matrix selection

Rose cuttings can also take root when directly inserted into ordinary soil, but the survival rate is not high and is not suitable for mass production. Therefore, generally choose fine sand as the matrix, fine sand had better not been used, in order to prevent cuttings from rooting in the process of decay, you can add formaldehyde in the fine sand, press 5ml / cubic meter, and put the fine sand on the clean beach and turn it about 3 times, so that formaldehyde can be completely volatilized, 3 days later can fill the bed. When filling fine sand, it should be evenly assisted on the seedbed, gently suppress, and pour water once, and gently scrape the sand surface with wooden blocks when the water is not dry.