杂交马褂木幼林施肥试验

以杂交马褂木幼林为供试对象,进行不同肥料种类和施肥量试验。结果表明：追肥1a后,各施肥处理间树高生长量有极显著差异,以施洞氮复合肥0.25kg／株和马褂木无机专用肥0.25k∥株的树高生长量最大;追肥3a后,各施肥处理间树高生长量有极显著差异,胸径生长量没有显著差异,以施尿素0.25kg／株的树高生长量最大,胸径和树高生长量分别为3.09em和1.85m,比对照分别提高72％和111％。综合成本效益考虑,适合推广的肥料种类和施肥量依次为马褂木无机专用肥0.1ks／株、马褂木无机专用肥0.25k∥株和尿素0.25kg／株。

Fertilization experiment on the young forest of Liriodendron chinese x L.tulipikera

The fertilization experiment on the young forest of Liriodendron chinese x L. tulipikera was conducted with different types and quantity of fertilizer. The results showed that, in the first year after fertilization, there was a very significant difference in the increment of tree height among different fertilization treatments, and the increment of tree height were the best with Dongdan compound fertilizer 0.25 kg/strain and Liriodendron chinese ×L. tulipikera inorganic fertilizer 0.25 kg/strain. In the third year after fertilization, there was a very significant difference in the increment of tree height among different fertilization treatments, but there was no significant difference in the increment of the diameter at breast height. And the increment of tree height were the best with urea 0.25 kg/strain, the increment of DBH and tree height were 3.09 cm and 1.85 m respectively, which were increased by 72% and 111% respectively compared with the contrast. Considering the cost and benefit, the most suitable types and quantity of fertilizers would be in sequence of the Liriodendron chinese ×L. tulipikera inorganic special fertilizer 0.1 kg/strain, Liriodendron chinese ×L. tulipikera inorganic special fertilizer 0.25 kg/strain and urea 0.25 kg/strain.