Exploration of the Fertilization Methods for Decreasing Heavy Metal in Sugarcane
[Objective]This study aims to investigate the effects of different fertilization treatments on the heavy metal content,yield,and quality of sugarcane.[Methods]Cane variety"GL05136"under five fertilization treatments,i.e.,chemical fertilizer(A),algae active cell bio-fertilizer(B),bio-organic fertilizer(C),algae active cell bio-fertilizer+bio-organic fertilizer(D)and non-fertilizer(CK)were carried out in this study.[Results]In comparison with chemical fertilizer(A)treatment,the contents of heavy metals in sugarcane,such as cadmium,mercury,arsenic and chromium were all significantly decreased by application with algae active cell bio-fertilizer(B),bio-organic fertilizer(C)and algae active cell bio-fertilizer+bio-organic fertilizer(D)treatments,and the decreasing contents were 0.05-0.08 mg/kg,0.01-0.02 mg/kg,0.09-0.13 mg/kg and 0.19-0.43 mg/kg,respectively.Additionally,in comparison with chemical fertilizer(A)treatment,the cane yield and the numbers millable stalk in algae active cell bio-fertilizer(B)and bio-organic fertilizer(C)treatments were significantly reduced by 1500-4455 kg/hm2 and 1860-2090 plants/hm2,respectively.However,there were no significant differences between algae active cell bio-fertilizer+bio-organic fertilizer(D)and chemical fertilizer(A)treatment.Moreover,the sucrose content and sugarcane juice brix all could be significantly improved by application with algae active cell bio-fertilizer(B),bio-organic fertilizer(C)and algae active cell bio-fertilizer+bio-organic fertilizer(D)treatment,compared with CK and A treatments,and the increasing range were 0.1％-1.27％and 0.2％-2.84％,respectively.[Conclusion]The algal active cell biological fertilizer(B),bioorganic fertilizer(C),and their combination(D)can significantly reduce the content of heavy metals such as cadmium,mercury,arsenic,and chromium in sugarcane plants.Additionally,the combined application of algal active cell biological fertilizer+bioorganic fertilizer(D)can also significantly increase the yield and quality of sugarcane.
sugarcanebio-organic fertilizeralgae active cell bio-fertilizerheavy metals
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