Spad

1. There is good correlation between chlorophyll content and SPAD values.: 叶绿素含量与SPAD值有很好的相关关系。

2. 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。

3. 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。

4. Chlorophyll content was 1.2 SPAD, and the chloroplast did not develop, with only small vesicle-like structures.: 结果发现叶绿素平均含量仅为1.2（SPAD），而叶绿体也不能正常发育仅有囊泡状结构。

5. Results showed that the alien plant of Mimosa bimucronata has a lowest SPAD value among all species determined.: 结果表明，外来植物簕仔树的SPAD值远低于其他植物；

6. 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。

7. 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。

8. The results showed that potassium application could raise the SPAD-502 chlorophyll test value, promote citrus tree growth, increase fruit yield and improve quality.: 结果表明，施钾能有效地提高叶绿素值、促进树体生长、提高果实产量和改善品质。

9. Leaf N/ chlorophyll content and SPAD value increased with the increasing N fertilizer, and the lower leaves were more sensitive to the soil N supply than the upper leaves.: 下位叶比上位叶对土壤氮的供应状况更为敏感，随着施氮量的增加，水稻叶片氮素含量、叶绿素含量、SPAD值相应的增加，而下位叶的增幅更明显。

10. The feasibility of readings of SPAD-502 on the nitrogen nutritional diagnosis of corn was studied through a simple field experiment and research method under field condition.: 采用简单的试验和研究方法在田间条件下研究了叶绿素仪应用于夏玉米氮营养诊断的可行性。

11. Compared with SPAD readings, the normalized redness intensity (NRI), with a high rvalue of 0.541-0.780 with conventional N parameters, could better express the N status of rice.: 红光标准化值与叶绿素仪SPAD读数相比能更好地表征水稻幼穗期的氮素营养状况，与常规测试指标的相关系数介于0.541～0.780之间。

12. Results showed that nitrogen fertilization rate significantly affected tobacco plant growth, leaf SPAD value, dry matter accumulation, leaf yield, economic value as well as chemical components.: 结果表明：在绿肥全部还田条件下，不同氮肥用量对烤烟株高、烟叶spad值、烟株干物质累积以及烤后烟叶产量、产值和化学成分均有一定的影响。

13. Key link of this technology is that the monitoring of satellite remote sensing image data picture, correspondence relation model between the ground monitoring SPAD value and growth health of barley.: 该项技术主要环节在于卫星遥感图片所监视的影像数据、地面监测SPAD值与大麦生长健康程度的对应关系模型。

14. Key link of this technology is that the monitoring of satellite remote sensing image data picture, correspondence relation model between the ground monitoring SPAD value and growth health of barley.: 该项技术主要环节在于卫星遥感图片所监视的影像数据、地面监测SPAD值与大麦生长健康程度的对应关系模型。

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