不同供水条件对Ⅰ-69杨树材质的影响  

Influence of Water Supply on Wood Property of Populus deltoides

作　　者：王世绩[1] 刘奉觉[1] 郑世锴[1] 柴修武[2] 张文庆[2] 

机构地区：[1]中国林业科学研究院林业研究所 [2]中国林业科学研究院木材研究所

出　　处：《林业科学研究》1991年第1期101-105,共5页Forest Research

基　　金：杨树丰产栽培中间试验(国家科委合同项目)"课题中;"杨树水分生理与合理灌溉研究

摘　　要：杨树生长对土壤水分条件的反应非常敏感,虽然不同品种或无性系之间存在着明显的差异,但从总体来看,木材年轮宽度的变化主要是由土壤水分供应条件所决定的。在有条件灌溉的地区,人们除了关心灌溉的花费与木材增长量之间的经济效益外,同时也关心灌溉量与树木材质之间的相互关系。换句话说,木材质量会不会因灌溉量过多而下降?下降多少?这显然是科技工作者应当回答的重要问题。遗憾的是,在国内外繁多的文献中,报道灌溉对树木生长影响的结论很多,但是,关于灌溉对材性影响的研究工作,国外也为数很少,国内更未见有报道。This paper intended to present the results of the series experiments conducted in Juxian County, Shandong Province, which aimed at determining the influence of water supply on wood property of Populus deltoides Bartr. cv. 'Lux' I-69/55. In the spring of 1982, cuttings of the above-mentioned species were set with a spacing of 3×6 meters in the experimental field, which was later (during 1983 and 1986) divided into several small irrigation plots. Averaging about 0.45 hectare in size, each plot was supplied with a fixed quantity of water by means of dripping rainmaker systems; while the plots of the control only relied on natural rainfall. In contrast, the plots with lst-class water supply generally received artificially dripped water about 50 percent higher than the rainfall they received, and about 100 percent higher in regard to those with 2nd-class water supply of the same contrast. The results of the experiments, gained through three repetitions of the similar practice, indicated that irrigation could promote greatly the volume increment of this species without giving noticeable influences on such measurements of wood fiber as its length, width, cavum diameter, and double-wall thickness. However, it would lead a declining trend to most indexes of wood concerning its physical and mechanical properties, such as basic density, hardness, com-pressive strength, bending strength, shearing strength, and impact ductility.

关 键 词：I-69杨 灌溉 木材性质 木材纤维长度 木材物理力学性质 

分 类 号：S792.119[农业科学—林木遗传育种]