Effect of biogas slurry on the growth performance and quality of king grass in the overwintering period

A single factor design was used to treat king grass (Pennisetum sinese) with different fertilizers, sheep manure biogas slurry (A₁), urea (A₂), and no fertilizer (CK), to study the effect of biogas slurry on the production performance and quality of king grass in Leizhou peninsula in winter. The results showed that the fresh / dry ratio of grass in the A₁ and A₂ groups was significantly improved. The fresh / dry ratio of group A₁ was 3.17 / 3.84, which was significantly lower than that of the other treatments (P < 0.05), but there was no significant difference between the A₂ and CK groups (P > 0.05). The plant height and growth rate of group A₁ were higher than those of the A₂ and CK groups (P < 0.05). The stem / leaf ratio was not significantly different in the A₁, A₂, and CK groups (P > 0.05). The crude protein (CP) and ether extract (EE) of group A₁ were significantly higher than those of the A₂ and CK groups (P < 0.05). The content of crude ash (Ash), crude fibre (CF), and nitrogen free extract (NFE) showed a significantly decreasing trend in the A₁ and A₂ groups compared to that in the control group (P < 0.05). In conclusion, the application of sheep manure biogas slurry can effectively increase the production performance and improve nutrition quality of overwinter king grass.