本研究通过对马尾松、红锥混交林及马尾松纯林的林冠结构及叶面积指数进行了对比分析。结果表明,混交林分两树种的林冠是镶嵌分布,林分总叶量平均比松纯林的高40.2％,林冠长比松纯林长69.13％,透光率只占松纯林的26.35％—66.62％,提高了叶面积指数,比松纯林的高64.59％。说明混交林比纯林更充分地利用太阳光能,提高林分生物生产力。 In this study, the canopy structure and leaf area index of masson pine, mixed coniferous forest and pure Masson pine were compared. The results showed that the canopy distribution of two species in mixed forest was inlaid, with the average total leaf volume of stands was 40.2% higher than that of pure pure forests, the canopy length was 69.13% longer than that of pure pure forests, and the light transmittance was only 26.35% -66.62%, increased leaf area index, 64.59% higher than the pure pine forest. It shows that mixed forest uses solar energy more fully than pure forest and improves stand productivity.