| The present experiment was conducted to analysis the correlation between the etiolation of ratoon sugarcane seedlings and the plentiful-lack condition of leaf mineral elements,to explore the mechanism of the disease from the point of nutrition. Surveyed Nanning, Chongzuo sugarcane area where the ratoon sugarcane seedlings etiolated severely，collected leaf samples of etiolated seedlings and normal seedlings, determined chlorophyll content and mineral element content. Results the N尧S content of etiolated seedlings was lower than normal seedlings, metal elements content of etiolated seedlings was higher than normal seedlings; high Al content in leaf was positively correlated with the etiolation of ratoon sugarcane seedlings highly significantly,the lack of leaf S content was positively correlated with the etiolation of ratoon sugarcane seedlings significantly. Conclusion High Al content in plant had produced toxic effects to sugarcane seedlings,that might be the major causes lead to ratoon sugarcane seedling etiolation; the lack of leaf S content was the secondary causes lead to ratoon sugarcane seedling etiolation. |
