Comprehensively evaluation of productive performance of Bothriochloa ischaemum populations by grey correlative degree analysis

In the present study, adaptation performance characteristics including hay yield, hay fresh ratio, leaf stem ratio, plant height, stem diameter, internode number, leaf number, and crude protein of four B. ischaemum populations grown in the Jinzhong areas of Shanxi Province were measured and analyzed by the grey correlative system. The productive performance of Taigu population was best in the studied area, Pingding and Dai County populations followed, whereas the Pinglu population had relatively low adaptive productivities. The order of weight index in the grey correlation analysis was: Ash NDF ADF stem diameter internode length leaf length EE biomass per plant leaf width plant height leaf stem ratio hay fresh ratio CP internode number hay yield leaf number.