马尾松,黎蒴栲混交林生产力的研究

本文分别研究了异龄马尾松、黎??混交林的生物现存量、净生产量、热能和生产结构.结果表明:该混交林的总现存量、乔木层净生产量和现存能量分别比英对照纯林高47.75％、112.99％和46.37％.混交林中马尾松乔木层现存量、净生产量和现存能量分别比纯林高6.82％、7.60％和6.82％.生产结构为:混交林的同化部分与非同化部分的比例略高于纯林;混交林中生产量的垂直分布较均匀,光能利用更充分.总的看来,混交林的生产力较高,形成了更合理的生产结构.

STUDY ON PRODUCTIVITY OF MIXED FOREST CONSISTING OF PINUS MASSONIANA AND CASTANOPSIS FISSA

In this paper standing crop, net production, heat energy and production structure in mixed forest of Piaus masacmiam and Castanopsis fisan of different ages were studied. The results showed: Standing crop, net production, heat energy of the mixed forest are respectively 47. 75%. 112. 99% and 46. 82% higher than those in the pure forest, and these of the trees of P. massoniana in the mixed forest are 6. 82%. 7. 60% and 7. 15% higher than those in the pure forest of P. massoniana. Production structure in mixed forest showed: Scale of the asimilative parts and the unasimila-tive parts of mixed forest are a bit bigger than those of the pure forest. The vertical biomass of mixed forest is distributed better than that of pure forest. So the light can be absorbed fully in the mixed forest. Generally speaking, the mixed forest will increase productivity and improve production structure.