Abstract:

A pot experiment was conducted to study the effects of different biogas fertilizer on rape and western celery’s yields and nitrogen use efficiency. Eight treatments were carried out: Control (CK), chicken manure biogas residue as base fertilizer (JZ), chicken manure biogas residue as base fertilizer and biogas slurry as top dressing (JZ+JY), half of the chicken manure biogas slurry as base fertilizer and another half as top dressing (JY), cattle manure biogas residue as base fertilizer (NZ), cattle manure biogas residue as base fertilizer and biogas slurry as top dressing (NZ+NY), half of the cattle manure biogas slurry as base fertilizer and another half as top dressing (NY), half of chemical fertilizer as base fertilizer and another half as top dressing (HF). The results showed as follows. The yields of JZ, JZ+JY, JY were 71.4, 74.0, 78.6 g/pot, which higher 26.1%, 14.0%, 2.5% than NZ, NZ+NY, NY respectively, The nitrogen use efficiency of chicken manure biogas fertilizer treatments were higher than the treatments of cattle manure biogas fertilizer, JY was the highest which reached 35.4%.