轮伐期马尾松力学性质的影响因素研究  

Study on Influencing Factors of Mechanical Properties of Pinus massoniana Lamb During Rotation

作　　者：郭桂芬 吴旭冬 夏磊 章丽红 Guo Guifen;Wu Xudong;Xia Lei;Zhang Lihong(Longquan Forestry Bureau,Lishui,Zhejiang 323700,China)

机构地区：[1]龙泉市林业局,浙江丽水323700

出　　处：《绿色科技》2023年第3期189-192,共4页Journal of Green Science and Technology

摘　　要：探讨马尾松力学性质的影响因素,为马尾松遗传改良提供理论依据。将10个种源33年生马尾松作为研究对象,通过分析不同种源马尾松生长指标和力学指标的差异性、种源地理气候因子与力学指标相关性、生长指标与力学指标相关性,分析轮伐期马尾松力学性质的影响因素。结果表明:不同种源33年生马尾松力学性质存在明显差异(P<0.01),变异系数幅度为5.41%~21.06%;种源经度、纬度对33年马尾松力学性质影响不明显(P>0.05),但是种源降水量、气温对其影响显著(P<0.05),气温越高,马尾松抗弯强度和硬度越低;气干密度与抗压强度和径面、弦面硬度呈极显著正相关(P<0.01),与冲击韧性呈显著正相关(P<0.05)。不同种源马尾松之间有明显遗传变异,气温、气干密度对马尾松力学性质的影响比较大。The influencing factors of mechanical properties of Pinus massoniana Lamb were discussed to provide theoretical basis for genetic improvement of Pinus massoniana Lamb.Taking 33-year-old Pinus massoniana Lamb from 10 provenances as the research object,the influencing factors of mechanical properties of Pinus massoniana Lamb in rotation cutting period were analyzed by analyzing the differences of growth indicators and mechanical indicators of different provenances,the correlation between geographical and climatic factors of provenances and mechanical indicators,and the correlation between growth indicators and mechanical indicators.The mechanical properties of 33-year-old Pinus massoniana Lamb from different provenances were significantly different(P<0.01),and the variation coefficient range was 5.41%~21.06%;The longitude and latitude of provenance had no significant effect on the mechanical properties of 33-year-old Pinus massoniana Lamb(P>0.05),but the precipitation and temperature of provenance had significant effects(P<0.05).The higher the temperature,the lower the bending strength and hardness of Pinus massoniana Lamb;The air dry density was significantly positively correlated with the compressive strength,radial and tangential hardness(P<0.01),and with the impact toughness(P<0.05).There is obvious genetic variation among different provenances of Pinus massoniana Lamb,and air temperature and air dry density have a greater impact on the mechanical properties of Pinus massoniana Lamb.

关 键 词：马尾松 木材力学性质 轮伐期 种源 气干密度 变异系数 

分 类 号：S7[农业科学—林学]