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由于近年来农业科学研究单位比較广泛地从事大田作物羣体中光的分布問題研究,国产五三型照度計就成为测光的主要仪器。通过应用,发現国产五三型照度計有一些缺点,主要是: 一、性能不夠稳定,特別在保管不善如受潮湿的情况下,它的光电池感光性能就会在几个月之内,甚至几十天,強烈地下降。表現对強光和弱光敏感性变差,测定不准。却使保管較好,如經常使用,光电池的感光性能也会下降。用它来連續测定光強有困
In recent years, the agricultural scientific research units engaged in field distribution of light more broadly in the field of crop research, domestic 53 type of light meter has become the main photometry instrument. Through the application, it has been found that there are some shortcomings of the domestic 51 type illuminometer, mainly: First, the performance is not stable enough, especially in the case of poor storage, such as wet conditions, its light-sensitive cell performance will be within a few months, or even Tens of days, a sharp decline. Performance of the light and weak light sensitivity deterioration, determination is not allowed. However, custody is better, such as regular use, the light-sensitive cell performance will decline. Use it to continuously determine the light trapped