竹柳在珠海沿海区的生长及适应性研究

应用随机抽样调查法，比较研究了珠海市不同林龄竹柳（Salix hybrid）的树高、胸径生长、生物量和生产力。结果表明，竹柳1.5~3.5 a 生扦插苗的树高年平均生长量为2.93~3.42 m，胸径年平均生长量为1.51~2.58 cm，单株材积年平均生长量为0.0028~0.0196 m3；3.5 a 生扦插竹柳林分生物量为30.25 t /hm2，林分净生产力为10.08~15.90 t/(hm2· a)。竹柳的早期胸径、树高、材积、生物量生长和生产力均低于尾叶桉（Eucalyptus urophylla）和巨尾桉（E. grandis × E. urophylla），但高于马尾松（Pinus massoniana）。竹柳能适应珠海沿海地区的气候和土壤，生长良好，但病虫害对其规模化发展的影响不可忽视。

Growth and Adaptability of Salix hybrid in Coastal Area of Zhuhai

The tree height, growth in diameter at breast height(DBH), biomass and productivity of different aged Salix hybrid in Zhuhai city were studied by random sample method. The results showed that the average increment of tree height among 1.5~3.5 years old cutting seedlings of S. hybrid was 2.93~3.42 m; The average increment of DBH was 1.51~2.58 cm, and average increment of single volume was 0.002 8 ~ 0.019 6 m3. The stand biomass of 3.5-year-old cutting seedlings of S. hybrid was 30.25 t/hm2 and the net productivity was 10.08 ~ 15.90 t/( hm2 · a). The early growth, volume, biomass and productivity of S. hybrid were lower than those of Eucalyptus urophylla and E.grandis×E.urophylla, but higher than Pinus massoniana. S. hybrid can adapt to the climate and soil in the coastal area of Zhuhai, and grow well, but the influence of plant diseases and insect pests on its large-scale development cannot be ignored.