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自从六十年代推广落叶松全光育苗以来,日灼害的发生和防止就随之提到日程上来。探讨日灼发生的规律、特点,以便采取针对性措施加以预防,是非常必要的。本文结合多年来的观测和试验,谈谈这方面的几个问题。 一、观测和试验项目 (一)观测随苗木生长发育阶段导致日灼的温度界限。(二)苗木本身发育状况与日灼的关系。(三)防日灼试验的结果与分析
Since the promotion of larch seedling nursery in the 1960s, the occurrence and prevention of sunburn have come to the agenda. It is necessary to explore the regularity and characteristics of sunburn in order to take targeted measures to prevent it. This article combines years of observation and experiment, to talk about several issues in this area. First, the observation and pilot project (A) observed with seedling growth and development led to the sunburn temperature limits. (B) seedling itself development and the relationship between sunburn. (C) anti-sunburn test results and analysis