chlorophyll meter

基本解释

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。
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。
www.cje.net.cn
The field experiments were conducted for two consecutive growth seasons using SPAD-502 chlorophyll meter to quantitate the maturity of fresh flue-cured tobacco leaf.
利用SPAD-502叶绿素计进行了连续两年的田间试验，研究了烤烟鲜烟叶的成熟度量化判别。