The fastest method for cutting and rooting old branches in Yushu involves multiple key steps, and the following are detailed steps and suggestions: 1. Select suitable branches
Health status: Choose sturdy, pest free, resilient, and well grown branches for cutting. These branches have strong vitality and rooting ability, which can shorten the rooting cycle and improve survival rate.
Length and leaves: It is recommended to maintain a branch length of 8-10 centimeters and retain 3-5 leaves, which can aid in photosynthesis and nutrient supply. 2、 Processing branches and incisions
Disinfection and sterilization: Use carbendazim or plant ash to disinfect and sterilize the incision at the lower part of the branch to avoid bacterial infection.
Drying the incision: Place the processed branches in a cool and ventilated place to air dry for 3-5 days, wait for the wound to completely dry and heal, and then proceed with cutting. 3、 Prepare soil
Soil preparation: Use a mixture of cultivated soil, high-quality humus soil, and sand to make seedling soil. To improve fertility, a certain proportion of decomposed chicken manure or fish meal can be added to the cultivation soil.
Disinfection treatment: If conditions permit, soil can be disinfected, such as spraying soil with carbendazim or conducting high-temperature disinfection, to ensure the health and sterility of the soil. 4、 Cutting process
Incision treatment: Cut a 45 degree diagonal line at the incision of the branch, and cut it into a 'V' shape from the bottom in a clockwise direction along the branch, which helps increase the rooting area.
Soaking treatment: Insert the treated branches into water for about an hour to make them soft and absorb water. You can also try soaking the cut part of the branch in diluted potassium permanganate solution, white sugar solution, or vitamin B12 solution to promote rooting.
Stable cutting: Insert the branches firmly into the soil, with a depth that is approximately equal to the length of the branches at the bottom of the pot, and ensure that the branches are in a moist environment. 5、 Post maintenance
Temperature and humidity: Place the pre cut Yushu trees in a semi cool and well ventilated environment, keeping the soil moist but not too wet, and avoiding water accumulation in the pot soil. At the same time, pay attention to controlling the temperature between 15 and 28 degrees Celsius, which is the optimal temperature range for rooting in Yushu.
Light management: Newly planted Yushu trees need to avoid direct sunlight, but can accept bright scattered light. As the root system grows, the light intensity can gradually increase.
Watering and Fertilization: In the early stage of cuttings, watering should be mainly done to keep the soil moist, avoiding excessive or insufficient watering. No fertilization is required before rooting, but some carbendazim can be added during the first watering to further disinfect and kill bacteria. After rooting, diluted fertilizer can be applied in moderation to promote growth. 6、 Precautions
There is a certain difficulty in rooting the old branches of Yushu through cuttings, which requires experience and professional skills to operate. It is recommended to consult a professional horticulturist or relevant organization before performing this operation.
The best time for cuttings is around April to May in spring, when the temperature is suitable and the Yushu trees are in the peak growth period, which is conducive to rooting and survival.
Following the above steps and suggestions can maximize the rooting speed and survival rate of Yushu old stump cuttings.