马尾松复层林伴生树种生长及对土壤养分的影响

为评价不同马尾松复层林伴生树种的生长及土壤环境效益，在浙江开化研究了马尾松林下5个伴生树种黄檀(Dalbergia hupeana)、红茴香(Illicium henryi)、乌冈栎(Quercus phillyraeoides)、红豆树(Ormosia hosiei)和浙江楠(Phoebe chekiangensis)]生长状况及土壤养分特征的变化。结果表明：5种伴生树种中黄檀和红茴香保存率较高，黄檀和红茴香树高、胸径和冠幅显著大于其他3个树种；马尾松复层林的构建改善了土壤养分状况，尤其是土壤速效养分含量得到显著提高。主成分分析结果显示，5种伴生树种对改善林地土壤养分效果为乌冈栎>红茴香>红豆树>黄檀>浙江楠，综合来看，红茴香更适宜构建马尾松复层异龄林。

Effect of Underplanted Trees in Pinus massoniana Plantation on Growth and Soil Nutrients

Abstract: Growth and soil nutrients characteristics of five underplanted trees in Pinus massoniana plantation, including Dalbergia hupeana、Illicium henryi、Quercus phillyraeoides、Ormosia hosiei and Phoebe chekiangensis, were studied in Kaihua, Zhejiang Province. The results showed that survival rate, height, diameter at breast height and crown width of D. hupeana and I. henryi were higher than the other three species. Compared to pure P. massoniana plantation, soil nutrients condition of the irregular forests were greatly improved, expecially soil available nutrients significantly increased in the irregular forests. Analysis of multi-factor principal component indicated that the order of soil nutrients condition for the five underplanted tree species was Q. phillyraeoides>I. henryi>O. hosiei>D. hupeana>P. chekiangensis. As a whole, I. henryi was the optimum tree species underplanted in P. massoniana plantation among the five species.