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摘要: 为探明光照条件对杨桐Cleyera japonica采枝林枝条产量、质量的影响，并为制定采枝林的经营措施提供理论依据，开展了杨桐采枝林遮光试验，测定了不同遮光强度下杨桐生长状况、叶片色素质量分数变化等指标。结果表明：①遮光对叶绿素a，叶绿素b和花色素苷质量分数均有显著的影响，其质量分数随着遮光强度的上升而上升，以3层遮光处理的叶片叶绿素a，b和花色素苷质量分数为最高，分别为全光照处理的196.3%，191.2%和134.5%；②遮光对杨桐各项生长指标有明显影响，1层遮光处理下杨桐苗高、地径、生物量、根冠比和比叶面积最大，而叶间距最小；随遮光强度进一步加大，杨桐植株生长明显受到抑制。1层遮光能促进杨桐的生长，并提高叶片叶绿素质量分数，缩短叶间距，从而提高杨桐枝条的利用率。表3参15Abstract: To determine branch yield and quality as well as to provide a theoretical basis for the formulation of cultural practices in a branch-producing plantation of Cleyera japonica，a shading experiment was carried out to measure growth indexes and leaf pigment content with shading treatments of 100% full-light （control），50%，20% and 12%. Results showed that（1） chlorophyll a，chlorophyll b，and anthocyanin in the leaf of C. japonica increased with an increase in shading with chlorophyll a，b and anthocyanin highest with the 12% shading treatment，which was significantly more than the control. （2） With 50% shading，seedling height，diameter，biomass，root to shoot ratio，specific leaf area were highest，whereas leaf spacing was lowest. As shading intensity increased from 50% to 12%，seedling growth was inhibited. Since the one-layer shading treatment （50%） promoted seedling growth，increased chlorophyll content，and reduced leaf spacing，utilization of C. japonica branches increased.［Ch，3 tab. 15 ref.］
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Key words:
- silviculture /
- Cleyera japonica /
- shading /
- branch-producing plantation-growth /
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2010.05.024
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