In addition, the effect of nitrogen status on leaf SPAD was quantified by the value of leaf nitrogen concentration, and the relationship between SPAD and RGB was described with linear equation.

　
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  • 并基于葉片氮含量表達了氮素供應水平對葉片SPAD值變化規律的影響，同時(shí)用線(xiàn)性方程描述了葉片SPAD值與RGB值之間的定量關(guān)系。
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