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Effect of biofertilizers and their method of application on nitrogen economy in sugarcane

Effect of biofertilizers and their method of application on nitrogen economy in sugarcane

Indian Journal of Agronomy 35(1-2): 120-125

An experiment was conducted during 1985-86 and 1986-87 in sandy loam soil at Karnal (Haryana) to test the efficacy of two bio-fertilizers i.e. Azospirillum brazilense and Azotobacter chroococcum in combination with different doses of inorganic nitrogen (urea) in reducing the dose of nitrogen for sugarcrane crop. Cultivars Co 7717 (mid-late) and Co 1148 (late) were tried. Azospirillum was applied as sett inoculation as well as soil application while Azotobacter was given through soil alone. Results indicated that 75% N of recommended dose (112.5 kg N ha-1) either with sett inoculation of soil application of Azospirillum or Azotobacter recorded as much cane yield as with 150 kg N ha-1. However, reducing N dose got 50% (75 kg N ha-1) along with bio-fertilizers reduced the yields of cane and sugar significantly in comparison to above treatments. Juice quality was not altered by fertilizer treatments. Hence 25% of inorganic nitrogen (37.5 kg N ha-1) could be saved by the use of the these bio-fertilizers.

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Accession: 002353717

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