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随着林业科学的发展,叶面积已成为林业科研中一个不可忽视的测树指标,但对阔叶树苗期面积的测定,目前尚无成熟的方法。笔者用六种方法分别进行了杨树苗期的叶面积测定试验,现总结如下。一、材料与方法 1982年4月26日,在延边林研所苗圃,用一年生母条做插穗,将5个杨树品种按随机区组设计扦插。株距30厘米,行距50厘米,每小区20株,3次重复。各区组条件从蔽阴到全光照,其它条件相同。夏季发现有病虫害发生,其轻重程度因品种而异。
With the development of forestry science, leaf area has become an indispensable measure indicator in forestry research. However, there is no mature method to measure the area of broadleaf seedling. I used six methods were carried out poplar seedling leaf area test, are summarized as follows. First, materials and methods April 26, 1982, Yanbian Lin Institute Nursery, with annuals to do cuttings mother, poplar 5 varieties of randomized block design cuttings. Plant spacing 30 cm, row spacing 50 cm, 20 cells per plot, 3 times repeated. The conditions of each district from cloudy to full light, the other conditions are the same. Pests and diseases are found in summer, the degree of severity varies by species.