摘要
<正>运用层合梁经典理论和一阶剪切变形理论预测了木竹复合层合板的有效弹性模量、跨中正应力和挠度;用有限单元法对木竹复合层合板的弯曲性能进行了分析,并与理论分析结果进行了比较。结果表明,有限单元法用于分析木竹复合层合板的弯曲性能具有相当精度。
Abstract
In the experiment, six Chinese chestnut cultivars, including Yangshan oil chestnut, Tielitou chestnut, Double-season chestnut, Shao 18 chestnut and Heyuan oil chestnut were used as paternal cultivars for Nongda No. 1 chestnut. Yangshan oil chestnut had a common florescence time of 4 days with Nongda No. 1 chestnut, followed by Tielitou (3 days) and other chestnut varieties(2 days). Yangshan oil chestnut had the longest and heaviest male inflorescence, followed by Tielitou, Double-season chestnut and Nongda No. 1 chestnut in a decreasing sequence. Nongda No. 1 chestnut pollinated with Tielitou chestnut, DouBle-season chestnut and Yangshan oil chestnut had a fertile seed ratio of 91.25%, 80.00% and 76.14% respectively. When self pollinated and artificially pollinated with its own pollens, the ratios were 19.10% and 10.82%. respectively. Metaxenia phenomenon was observed in the single seed weight. Based on the experimental results, we believed that Tielitou, Shao 18 chestnut and Heyuan oil chestnut were suitable paternal cuttivars for Nongda No. 1 chestnut.
谢治芳,曾曙才,谢正生.
农大1号板栗授粉品种的择优研究[J]. 南京林业大学学报(自然科学版). 2005, 29(05): 94-96 https://doi.org/10.3969/j.jssn.1000-2006.2005.05.024
XIE Zhi-fang, ZENG Shu-cai, XIE Zheng-sheng.
Study on Selection of Paternal Cultivars for Nongda No. 1 Chestnut[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2005, 29(05): 94-96 https://doi.org/10.3969/j.jssn.1000-2006.2005.05.024
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