Effects of Different Biogas Fertilizers on Yield,Quality and Nitrogen Use Efficiency of the Rape

A pot experiment was conducted to study the effects of different biogas fertilizers on rape's yields,quality and nitrogen use efficiency.Eight treatments were carried out: without fertilizer(CK),chicken manure biogas residue as base fertilizer(JZ),chicken manure biogas residue as base fertilizer and biogas slurry as top dressing fertilizer(JZ+JY),half of the chicken manure biogas slurry as base fertilizer and another half as top dressing fertilizer(JY),cattle manure biogas residue as base fertilizer(NZ),cattle manure biogas residue as base fertilizer and biogas slurry as top dressing fertilizer(NZ+NY),half of the cattle manure biogas slurry as base fertilizer and another half as top dressing fertilizer(NY),half of chemical fertilizer as base fertilizer and another half as top dressing fertilizer(HF).All the fertilized treatments had same total N input.The yields of JZ,JZ+JY,JY are 13.8,14.9,14.8 g/pot respectively,and all of them were higher than the corresponding treatment of cattle biogas fertilizer.The nitrate content of chicken manure biogas fertilizer treatments are higher than cattle manure biogas fertilizer treatments.However there are no significant difference in Vc content.The nitrogen use efficiency in the treatments of chicken manure biogas fertilizer were higher than the treatments of cattle manure biogas fertilizer.This may the mineral N was higher in chicken biogas fertilizer than the cattle ones.