Effect of Biogas Digestate on Growth of Maize and the Yield

The biogas digestate was used as base fertilizer,seed soaking slurry and top fertilizer for maize in this study. Five treatments were designed each with 3 repetitions,and 22 m2for each repetition. Treatment Ⅰ was a control with clear water for seed saking and topdressing. Treatment Ⅱ adopted chemical fertilizer as the base fertilizer and with urea as top fertilizer. Test III,IV and the V treatments adopted biogas residue as the base fertilizer and with biogas slurry as top fertilizer with biogas slurry concentration of 30%,50% 和 70% respectively. The results showed that the application of biogas residue as base fertilizer and seed soaking with biogas slurry could make the maize sprouting faster,the bud grew thicker and orderliness,the seedling growth vigorous. And the corncobs were more and growth larger in the later growth period. The treatment with biogas application of 4000 kg·667m- 2,seed soaking with biogas slurry for 24h,and top addressing with biogas slurry concentration of 50%,had the best works.