论文部分内容阅读
前言Horne 曾于1978年报导过,在澳大利亚新南威尔士州北海岸的一片巨桉(Eucaly-ptus grandis Maiden)试验人工林中,在1976～1977年期间进行精心培育,经过13个月之后,木材产量提高,约27倍于未处理的对照林木的木材产量。为了达到速生,采用一系列综合措施,林地经过犁耕,不断对树木施复合肥(氮、磷、钾和硫),林地经常除草,用杀虫剂防治食叶昆虫。采取措施的林木生长速度大大加快,故此认为有必要对处理过的和未处理过的对照木的性质进行比较。试验用的试材取自1979年的非商业性疏伐木,树龄近30个月,其带皮平均直径在离地30厘米处测定,速生树木为10.4厘米,未处理的对照木为4.3厘米。分别对下列材性作了测定:基本密度,纤维长度、直径和壁厚,导管直径和数目以及射线体积率。
Preface Horne reported in 1978 that in the Eucalyptus grandis Maiden experimental plantation on the north coast of New South Wales, Australia, cultivation was carefully carried out between 1976 and 1977. After 13 months, wood The yield was increased by about 27 times the timber production of untreated control trees. In order to achieve a fast-growing life, a series of comprehensive measures have been taken to plow the woodlands and apply compound fertilizers (nitrogen, phosphorus, potassium and sulfur) to the trees. The weeds are often weeded in the woodlands and insecticides are used to control leaf-eating insects. Measures taken for the growth of trees significantly accelerated, it is considered necessary to control the nature of treated and untreated control wood for comparison. The test material was taken from a non-commercial thinning wood from 1979 that was nearly 30 months old. The average peeled skin diameter was measured at 30 cm above the ground. The fast growing tree was 10.4 cm and the untreated control was 4.3 cm. The following materials were measured: basic density, fiber length, diameter and wall thickness, tube diameter and number, and radiographic volume rate.