Correlation Analysis between SPAD Value and Chlorophyll Content of Bean Leaf
To explore the correlation between SPAD value and chlorophyll content of bean leaf, the leaf SPAD value and chlorophyll content of 4 bean varieties, Thailand bean, Baiyunfeng, Henan South bean and Little Red, were determined by chlorophyll meter and spectrophotometry respectively, and then the relations of SPAD value with chlorophyll a (Chla), chlorophyll b (Chlb) and the total chlorophyll content [Chl (a+b)] were fitted by the linear, logarithmic and power and exponential function.The results showed that all the 4 functions could well fit the relations of bean leaf SPAD value with Chla, Chlb and Chl (a+b) with very significant positive correlation, but the optimal function model of the relations in different varieties were different.For the correlation of SPAD value with Chla, the optimal function model of Thailand bean, Baiyunfeng, Henan South beans and Little Red was y11=0.0709x-1.6531 (r=0.9157**), y12=0.0792e0.0687x(r=0.8256**), y13=0.0623x-1.3382 (r=0.8267**), y14=1.1838ln(x)-3.2834 (r=0.8292**), respectively.For the correlation of SPAD value with Chlb, the optimal function model of Thailand bean, Baiyunfeng, Henan South beans and Little Red was y21=1.2284ln(x)-3.8589(r=0.8207**), y22=1.0593ln(x)-3.2009(r=0.7378**),y23=0.0327e0.0723x(r=0.8328**), y24=1.0115ln(x)-3.0701 (r=0.7871**), respectively.For the correlation of SPAD value with Chl(a+b), the optimal function model of Thailand bean, Baiyunfeng, Henan South beans and Little Red was y31=4.0416ln(x)-13.0430 (r=0.9124**), y32=0.1781e0.0597x(r=0.9064**), y33=0.1823e0.0564x(r=0.8798**), y34=2.1952ln(x)-6.3535 (r=0.8319**), respectively.
国家科技期刊平台
NSTL
万方数据
维普
