Chlorophyll meter SPAD-502 should be used broadly in forestry research because of its convenience to carry, simple and rapid measurement, and no damage to leaves.
由于叶绿素计SPAD - 502携带方便、测定简便、迅速，且不损坏叶片，应在林业研究中积极推广使用。
The SPAD-502 chlorophyll meter appears promising for rapid, on-farm analysis of crop nitrogen status.
叶绿素仪（SPAD-502）的出现使通过无损伤的田间速测对作物进行氮营养诊断成为可能。
As an instrument of measuring the chlorophyll content, the chlorophyll meter can also be used in measuring the nitrogen content of crop, and it is rapid, accurate, and convenient for this use.
作为一种测量叶片叶绿素含量的仪器，叶绿素仪可以作为测量作物含氮的仪器使用，具有快速、准确、简便的特点。
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