Fast-growing poplar varieties grow fastest. Fast-growing poplar varieties include Populus deltoides 107, 63, 69, 72, Nankang 1, Nankang No.2, Lin Nan 95 and 895 Yang Miao. , are excellent poplar varieties selected in recent years. These poplars grow fast and have strong resistance to pests and diseases. The five-year-old DBH 14-25cm is 40%- 1 14% larger than that of common poplar.

In particular, American black poplar Nankang 1, Zhenyang and Yangzi poplar, Nankang No.2 and Nankang poplar are all new varieties identified in 1990. These three poplar varieties grow rapidly, with straight trunks and strong resistance to Monochamus alternatus. The average DBH of 5-year-old poplar is 20.82 cm, that of Yangtze River Yang Da is 25.22 cm, and that of Nankang poplar is 23.38 cm.

Matters needing attention in poplar seedling management:

1, current account. It usually takes 2 ~ 4 weeks from cutting to rooting and spreading leaves. During this period, cuttings are most likely to lose water balance and have weak resistance, and cuttings that cannot take root in time will die.

2. Seedling stage. It usually takes about 5 weeks from cutting to rooting, spreading leaves and entering the fast-growing period.

3. Rapid growth period. The time from the sharp rise of high growth to the sharp decline of high growth is generally from early June to mid-September.

4, capping hardening period. From the emergence of terminal buds to defoliation, the high growth basically stops at this stage, but the growth of roots and DBH will continue for some time, so attention should be paid to pest control.

Refer to the above? Baidu encyclopedia-poplar