Abstract:

The aim was to know the manifestations of different sugarcane genotypes in low nitrogen stress. ROC22 was used as control in the comparative planting experiment, and six Guitang strains from seeding in 2004 were studied. The results indicated that germination rate, stalk diameter, millable stalks, the cane yield and sucrose content of 04/1028, 04/1531, 04/522, 04/539, 04/2299 and 04/109 were higher than those of CK. The ability of Guitang 04/539 in low nitrogen stress was strongest. Its cane yield and sucrose contents were 104.81 t/hm2 and 15.04 t/hm2, which increased 17.46% and 15.04%, respectively, compared with CK. The tillering rate and internode elongation of the sugarcane strains were influenced badly by low nitrogen stress. The result could be given reference for further nitrogen efficiency sugarcane breeding.