1. How to graft Populus tomentosa?
1, condition
Grafting time and different poplar varieties as rootstocks have certain effects on grafting seedling of Populus tomentosa. Poplar varieties with fast growth and strong growth are generally selected as rootstocks, and grafting is generally carried out in March of spring.
2. Method
Populus deltoides, such as Populus deltoides 2025 and Populus deltoides 46 in Lin Zhong, are all good varieties, and they are better as grafting rootstocks of Populus deltoides. Select the seedlings of the current year whose ground diameter is more than 2cm, and cut them off at 35 ~ 40 cm after transplanting. In mid-March, suitable scions were selected for grafting, and the xylem budding method was used for grafting at the position of 5 ~ 10 cm above the ground.
Step 3 maintain
Careful maintenance is needed within 10 ~ 20 days after grafting. When the shoots grow to 7 ~ 15 cm, they can be untied and the buds on the rootstock can be wiped several times. Fertilization should be carried out according to the growth characteristics of Populus tomentosa, and fertilization should be carried out frequently during the growing season to keep up with the moisture.
2. Introduction of grafting technology of Populus tomentosa.
1, planting
Populus tomentosa grows fast and needs a lot of water. When planting, it should be sparse and the density should be controlled, not too dense. Dig a deep pit, between 20 cm and 80 cm, and water it with the tillage. After watering, the soil should be practical.
water
During the rapid development period of Populus tomentosa, water it 2 ~ 3 times regularly, and water it every time. In rainy years, attention should also be paid to timely drainage to promote the vigorous growth of seedlings. After entering September, irrigation should be little or no, and water should be controlled as much as possible.
Step 3 apply fertilizer
After transplanting, the seedlings will enter the stage of water and fertilizer conservation in May, and the amount of fertilization should be gradually increased. The peak growth period is from July to late August. Start applying 25 kilograms of urea, apply 30 kilograms of compound fertilizer in early August, and apply fertilizer for the last time in early August.
Third, the greening prospect of Populus tomentosa
Red-leaved poplar does not choose soil, which has strong adaptability and fast growth. It not only integrates greening, coloring, purification and multifunction, but also plays an irreplaceable role in irrigation and grass planting with the acceleration of urban, garden and road greening construction. Populus tomentosa's fast-growing and gorgeous colors are incomparable to other colorful tree species, and it can be widely used as a landscape tree species in gardens. If it is matched with other yellow-green trees and shrubs, it will show its bright and dazzling effect.