The correlation study of SPAD value, chlorophyll content and crude proteincontent in two varieties of Lolium perenne

SPAD value, chlorophyll content and crude protein content were determined between two Lolium perenne varieties,Lan Tian Tang and Chang Jiang No.2.At the same time, the difference and relationship in three traits between two varieties were compared and analyzed. The results showed that Chang Jiang No.2 was higher than Lan Tian Tang in SPAD value, chlorophyll and crude protein content. The first leaf was bigger than the second leaf in the three traits of the two L.perenne varieties, but it was not significant difference. Either SPAD value and chlorophyll content or SPAD value and crude protein content between the two L.perenne varieties were significant linear relationship.