Effect of Biogas Residue and Biogas Slurry Fertilization on the Yield,Quality and Nitrogen Use Efficiency of the Rape

A Pot experiment was conducted to study the effects of biogas residue and biogas slurry on rape's yields,quality and nitrogen use efficiency.The results showed:The yields of rape which was used biogas slurry and chemical fertilizer singly were 13.41 g/pot and 13.70 g/pot.However there was no yield significant difference between biogas slurry treatment and chemical fertilizer treatment.They were all significantly higher than that of biogas residue treatment.And the results also indicated that the rape's nitrate content was significantly different because of different treatments.The nitrate content of biogas residue,compound of biogas residue and biogas slurry,biogas slurry and chemical fertilizer treatment were 216.8,287.4,464.3 and 1 003.0 mg/kg respectively.Meanwhile,the rape's Vc content of biogas residue treatment and compound of biogas residue and biogas slurry treatment was 5.3 mg/100g rape、5.19 mg/100g rape,they were significantly higher than that of chemical fertilizer treatment and biogas slurry treatment.There were no significant difference on the N use efficiency(NUE) between biogas slurry treatment and Chemical fertilizer treatment,which reached 49.6% and 51.8% respectively.But those two treatments NUE were higher than others significantly.