《Table 3 Relationships between SPAD and Chl for Oak(Quercus variabilis Bl.)》

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《伏牛山栓皮栎叶绿素含量野外测量与实验室分析数据集》

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Correlation relationships of SPAD and Chl were analyzed and four types of regression models were developed（Table 3）.According to Coefficient of Determination（R2），the best-fit of SPAD-Chl for total chlorophyll goes to exponential regressive model，with a R2 of 0.927.Within Chl，the SPAD-Chl relationship for chlorophyll a（Chla）is better than that for chlorophyll b（Figure 1）.