摘要
在施肥与未施肥、淹水与未淹水两种生态条件下,以杨树人工林木材I-69杨为对象,对木材年轮宽度、基本密度、干缩性质、主要力学性质进行了测试,并对数据进行了统计、对比和分析.结果表明,施肥处理后,木材年轮宽度、静态抗弯弹性模量和顺纹抗压强度分别增大0.99%、2.73%和1.06%;全干时和气干时的径向、弦向、体积全干干缩率分别降低了4.2%、7.7%、6.6%、15.6%、6.3%和11.1%;木材密度、抗弯强度、动态抗弯弹性模量则分别降低了2%、1.79%、8.13%.与未淹水相比,季节性淹水对I-69杨木材密度、木材干缩率和力学性质的影响较大,二者差异显著(P<0.05).其中木材密度、全干时和气干时的径向、弦向、体积干缩率、抗弯强度、抗弯弹性模量以及顺纹抗压强度分别降低了5.5%、11.1%、9.2%、9.6%、16.7%、10.9%、8.5%、24.29%、18.18%和16.81%.
The measurement of the physicomechanical properties of 9 plantation poplar 1-69 (Populus deltoides CV. 1-69/ 55)woods under fertilization and seasonal flooding showed that compared with no fertilization, fertilization increased the ring width, static modulus of elasticity, and compressive strength parallel to the grain by 0.99 % ( P 〉 0.05), 2.73 % ( P 〈 0.05 ) and 1.06 % ( P 〈 0.05 ), while decreased the air-dry radial, tangential, volumetric shrinkage, oven-dry radial, tangential, volumetric shrinkage, basic density, MOR, and dynamic modulus of elasticity by 4.2 %, 7.7 %, 6.6 %, 15.6 %, 6.3 %, 11.1%, 2 %, 1.79 % and 8.13 %, respectively. Seasonal flooding decreased the basic density, air-dry radial, tangential, volumetric shrinkage, oven-dry radial, tangential, volumetric shrinkage, MOR, MOE, and compressive strength parallel to the grain by 5.5%, 11.1%, 9.2%, 9.6%, 16.7 %, 10.9 %, 8.5 %, 24.29 %, 18.18 % and 16.81%, respectively, in comparing with non-flooding.
出处
《应用生态学报》
CAS
CSCD
北大核心
2005年第11期2012-2018,共7页
Chinese Journal of Applied Ecology
基金
国家科技部中法合作先进项目(PRA-BT00-04)
瑞典国际科学基金组织国际科学基金项目(IFS-D/2778-2F)
安徽省自然科学基金项目(01011104)
安徽省优秀青年科技基金资助项目.
关键词
施肥处理
季节性淹水
Ⅰ-69杨
物理力学性质
木材变异
Fertilization, Seasonal flooding, Poplar 1-69, Physicomechanical properties, Wood variation.