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本文初步说明广州地区的气温和降水二种因素,对于引种的大叶桉的木材细胞的存在和排列、大小和多少的影响。大叶桉的原产地的“夏季”12-2月是栽培地的冬季。在两地的气候要素中,有的完全相反,其他亦并不一致。各种木材细胞的大小和比例,在同一生长轮的不同部分之间的比较结果,可以说明这里大叶桉的异常季节生长层是与生长于澳洲原产地的内部(早材)相当。尤以导管和纤维二者更为显著。大叶桉在广州还未形成分明的生长轮,但其内部和外部的存在,可以反映它正在受着生长环境的影响。一切木材要素在第15生长轮组一般比在第10轮组发达,然而前者的论阔则比较狭些。此外,导管分子和纤维的长度,在仅供参考的第20生长轮组都是接近第10轮组的。本文作者对于方泽蛟先生帮助搜集和解释一些有关气象和气候的资料,深致感谢。
This article initially illustrates two factors, air temperature and precipitation in Guangzhou, for the presence and arrangement, size and amount of wood cells in Eucalyptus grandis introduced. Eucalyptus eucalyptus origin of “summer” 12-February is cultivated in winter. Among the climatic elements in both places, some are the opposite and others are not the same. The comparison of the size and proportion of various woody cells between different parts of the same growth circle shows that the abnormal seasonal growth layer of Eucalyptus grandis is comparable to that of the native (earlywood) native to Australia. Especially both catheters and fibers are more pronounced. Eucalyptus in Guangzhou has not yet formed a clear growth wheel, but its internal and external existence, can reflect it is being affected by the growth environment. All Timber elements are generally developed in Wheel 15 growth than in Wheel 10, whereas the former is broader in scope. In addition, the lengths of the catheter molecules and fibers are close to the tenth wheel set for reference only. The authors would like to express their gratitude to Mr. Fang Zejiao for helping to collect and explain some of the weather and climate data.