Field application of anerobically co-digested dairy manure and food processing wastes

本研究的目的是评价厌氧共消化牛粪和食品加工废弃物作为有机肥的效果，并比较消化牛粪和化肥对冬小麦(Hokushin)土壤氮素和籽粒产量的影响。通过培养试验表明，4周内NH4-N几乎转化为NO3-N。在101d的时间里，土壤中积累了15%的无机氮。共消化牛粪和化肥的籽粒产量差异不显著，但共消化有机肥的籽粒蛋白质含量高于化肥(p&lt；0.05)。

The purpose of this study was to evaluate the effect of anerobically co-digested dairy manure and food processing wastes as an organic fertilizer, and to investigate the changes in soil nitrogen and grain yield of winter wheat (Hokushin) comparing digested dairy manure with chemical fertilizer.By the incubation test, it was clear that the NH_4-N was almost converted into the NO_3-N for four weeks. Over the period of 101 days, 15% of inorganic N was accumulated in the soil. Between grain yields where co-digested dairy manure and chemical fertilizer were applied, there were no significant difference, but protein contents in grain were higher in co-digested manure applied than chemical fertilizer one (p<0.05).