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OALib Journal期刊
ISSN: 2333-9721
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楸树叶面积指数的测度及冠层空隙度的季节动态
DOI: 10.3969/j.issn.1000-2006.2013.02.011, PP. 59-64
Keywords: 楸树,叶面积指数,冠层空隙度,季节动态
Abstract:
应用lai-2000植物冠层分析仪,测定了楸树叶面积指数(lai)和冠层空隙度的季节动态。结果表明:29个楸树无性系叶面积指数均呈现出明显的季节性变化,变化总趋势均呈先上升再下降的单峰曲线,峰值出现在9月,无性系间叶面积指数呈极显著的差异;楸树冠层空隙度也呈现明显的季节性,变化总趋势呈现先下降再上升的单峰曲线,最低峰值出现在9月。楸树是喜平型冠层,叶倾角的季节变化不大,均在一定范围内波动。楸树冠层均匀性差异较大,生长较好的无性系冠层均匀性较好,生长较差的无性系冠层均匀性较差。分析发现,楸树叶面积指数和冠层空隙度相关极显著,并且呈指数回归的关系(r2>0.980),回归式为:y=ae-bx。
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