Abstract: The double-ear ratio and some other traits of maize materials with different prolificacy,which were screened in Bashang upland,were conducted in four ecological environments,i. e., Bashang (spring sown), Xianghe (spring sown), Beijing (summer sown) and Hainan (autumn sown). The main ecological elements affecting maize prolificacy were analyzed initially. The results show that the ecological environment of Bashang upland is favorable to maize double-ear traits,and reduces plant and ear height,increases stem width,leaf number below ear and leaf age at beginning of ear differentiation. Hence,it is inferred that the Bashang environment with lower temperature and higher radiation postpones the reproductive development of maize,and is advantageous to vegetative growth. It also contributes to an approach of differentiation processes of several ears at top node positions during booting stage,and ultimately leads to the enhancement of double-ear silking and kernel bearing.

Key words: Maize, Prolificacy, Ecological elements

CLC Number: 

• S513.01