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。
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。
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。
Therefore, the objective of theis study was to evaluate these three different chlorophyll meter-based approaches for diagnosing N status of summer maize.
因而，这次研讨的主要目的就是，经过三种不同的办法运用叶绿素丈量仪就夏天玉米的含氮量停止研讨。
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 first common approach is to set up threshold values at important growth stages and then compare the measured chlorophyll meter values with the threshold values.
其中一个常用的办法是：在作物生长的关键时期设定一个界线值，与原来的丈量值做出比拟；
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。
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。
应用推荐