不同品种和经营措施对泡桐生长量的影响

Effects of Different Varieties and Management Measures on Growth of Paulownia Trees

为筛选出最适宜湖北低山丘陵区种植的泡桐品种及最佳经营措施,在湖北省京山市虎爪山林场采用三因素试验设计研究不同品种、密度、造林模式及其互作效应对泡桐生长的影响。结果表明:(1)品种对泡桐生长量影响最大,‘中桐1号’(C1)在所有品种中表现最为优良,其次为‘01-23’(C3)品种。(2)随着林龄的增加,不同造林密度和造林模式间泡桐生长量逐渐趋于一致,各生长指标无显著影响;在幼林期,不同造林密度、造林模式、品种及其互作效应对泡桐胸径、单株材积生长有显著影响,但随着林龄的增长,仅有造林密度和造林模式表现出较强的互作效应。因此,在湖北低山丘陵区可优先选择‘中桐1号’和‘01-23’号泡桐品种进行推广种植。

To screen the most suitable varieties of Paulownia and the best management measures for planting in the hilly areas of Hubei Province.The three factors were used to study the effects of different varieties,density,afforestation model and their interaction on the growth of Paulownia trees in the Huzhao Mountain Forest Farm of Jingshan City,Hubei Province.The results showed that:①Varieties had the greatest effect on the growth of Paulownia trees,and the variety of‘Zhongtong 1st’(C1)showed the best performance among all varieties,followed by the variety of‘01-23’(C3).②The growth of Paulownia tree gradually tends to be the same among different afforestation density and afforestation models,and the growth index has no significant effect,with the increase of forest age.At the young stage,different afforestation densities,afforestation models,varieties and their interaction effects had significant differences on DBH and individual volume growth of Paulownia,among which varieties had the largest effect on the growth of Paulownia with extremely significant differences(P<0.01).But with the growth of standing age,only the afforestation density and afforestation model showed strong interaction effects.Taking all factors into consideration,the varieties of C1 and C3 can be preferentially selected for promotion and planting in the hilly areas of Hubei Province.