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通过对岷江上游退化灌丛不同恢复阶段的群落冠层分析,得到其光环境特征指标:PPFD(光量子通量密度)、Gap(空隙度)、MLA(平均叶倾角)、LAI(叶面积指数)。分析结果表明,群落冠层PPFD、Gap和MLA随恢复时间增加而降低,LAI随恢复时间增加而增加,反映了特定的光环境下,人工恢复群落较自然恢复群落稳定性好。
Through the canopy analysis of the communities in different restoration stages of the degraded shrubs in the upper reaches of the Minjiang River, photosynthetic characteristics indicators such as PPFD (light quantum density), Gap (porosity), MLA (average leaf tilt), LAI (leaf area index) . The results showed that the canopy PPFD, Gap and MLA decreased with the increase of recovery time and the LAI increased with the increase of recovery time, which indicated that the stability of artificial restoration community was better than that of natural restoration community under the specific light environment.