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。
Use the SPAD-502 chlorophyll meter to rapid, on-farm analysis crop chlorophyll status and nitrogen fertilizer recommendation.
利用叶绿素仪SPAD- 502进行田间快速测定，并对作物进行氮肥推荐。
Chlorophyll content of crop leaves would be determined quickly using SPAD-502 chlorophyll meter.
用SPAD- 50 2叶绿素计和相关函数可迅速测定作物叶片的叶绿素含量。
Chlorophyll content of crop leaves would be determined quickly using SPAD-502 chlorophyll meter.
用SPAD- 50 2叶绿素计和相关函数可迅速测定作物叶片的叶绿素含量。
应用推荐