鹅掌揪生长发育特性及配套技术

鹅掌楸、北美鹅掌楸及其两种的杂交种，形态特征各异。杂交种与鹅掌楸和北美鹅掌楸相比较:平均胸径分别大60.8%和32.1%；干均树高分别高31.4%和10.6%，地上部分总生物量分别大233.5和94.4%。计算生物量时筛选出3组数学模型。鹅掌楸大多呈散生状优势木，在浙江省遂昌、浮安、临安等地，10年生林木胸径为16.83cm，12年18.45 cm，15年生23.50cm，材积连年生长量最高峰在13年生左右。根据鹅掌楸的生长发育特性，制定了鹅掌袱属的配套栽培技术。

Growth-development Habits and Culture Techniques of Liriodendron.

The hybrid which was produced from Liriodendrone chinense (L1)xL. tulipifera (L2), at 16 years old, had 60.8% and 32.1% greater than L1 and L2 respectively in mean DBH, 31.4% and 10.6% in mean height, and 233.5% and 94.4% in above-ground bioamss. L1, L2 and their hybrid were different in morphological characters. Three mathematical models for calculating biomass were selected. In Suichang, Chunan and Linan County of Zhejiang Province, L.starred in a mixed forest were mostly dominant trees, with 16.83 cm DBH at 10 years old, 18.45cm at 12 year sold, and 23.50 cm at 15 years old. Current annual increment involume peaked at 13 years old or so. According to the bioecology, a set of culture techniques for L. was made.