Objective: To compare the economical characters, yield characters and content of catalpol on Rehmannia glutinosa Libosch. varieties.
Methods: To study characters by field randomized block test and analysis of variance. To analyse the content of catalpol by HPLC.
Results: The results by analysis of variance were that the F value in plant width was 15.4 (F0.01 = 5.54), the F value in length of leaves was 12.2, the F value in width of leaves was 13.35, the F value in yield of single plant was 55.7 and the F value in content of catalpol was 8.03. The results by correlative analysis were that the linear correlation coefficient of signal plant yield with length of leaves was 0.9639, with width of leaves was 0.9073, with amount of earthnuts was 0.7060 and with plant fresh weight was 0.9950. The linear correlation coefficient of content of catalpol with plant width was 0.9169, with length of leaves was 0.7046 and with width of leaves was 0.7159.
Conclusion: There were significant differences in plant width, length of leaves width of leaves, and yield of single plant and content of catalpol of Rehmannia glutinosa Libnosch. varieties. There were significantly positive correlations in signal plant yield with plant fresh weight, length of leaves, width of leaves and amount of earthnuts. There were significantly positive correlations in content of catalpol with plant width, length of leaves and width of leaves.