Milan layering propagation method
As a deeply loved aromatic ornamental plant, the layering propagation method of Milano flowers can not only retain the excellent characteristics of the mother plant, but also achieve large-scale cultivation. This paper systematically analyzes the complete process and core technical points of Milan layering propagation through practical illustrations. The best time for Milan's core four-step layering breeding is to seize the prime time for Milan's layering from April to August, when the average daily temperature stabilizes above 25 ° C and the air humidity reaches 60%. It is particularly recommended to operate in the plum rainy season (June to July), when the branch cambium is active, and combined with a high humidity environment, the rooting rate can be increased to more than 85%. It is necessary to strictly avoid early spring and winter when temperatures are below 15 ° C. Select annual semi-lignified branches with a diameter of 0.8- 1.2 cm and retain the top 3-4 leaves. Use the double ring peeling method: cut the upper and lower rings to a width of 1cm, leaving a 0.5cm transition area in the middle, reaching the depth of the xylem. Using a disinfecting blade to bevel 45° can stimulate rapid formation of callus. The intelligent moisturizing system recommends the use of moss + perlite (3:1) mixed matrix, which has a water holding rate of 75% and excellent air permeability. The packaging adopts a "sandwich" structure: an inner moisturizing matrix, a middle PE film (reserved ventilation holes), and an outer light-blocking aluminum foil. Supplement 50ml of water with a syringe every 3 days. At the key point of transplanting, when the new roots grow to 5cm and are yellow-white, choose 9-11 a.m. on sunny days to transplant. The substrate ratio is peat soil: vermiculite: pine scale =5:3:2, and 0.1% naphthylacetic acid solution needs to be added to the first root determination water. Maintain 80% shading rate for 15 days after transplanting, and gradually transition to normal maintenance. Advanced techniques for layering propagation use the "aerial layering + hydroponics transition method" to improve the success rate: keep the substrate moist during the rooting stage, switch to shallow hydroponics (water level 1cm) after new roots germinate, and switch to soil culture after 7 days. Combined with ABT rooting powder 1000ppm solution to treat the girdling site, the rooting time can be shortened to 40 days.
By accurately controlling temperature and humidity, scientifically selecting substrates, and rationally using growth regulators, the success rate of Milan layering reproduction can reach more than 90%. It is recommended to disinfect the tools at high temperature before and after operation, and regularly check the root development to ensure the healthy growth of new plants.