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

本试验旨在评价厌氧共消化乳粪肥与食品加工废弃物作为有机肥的效果，并比较消化乳粪肥与化肥对冬小麦土壤氮素和籽粒产量的影响。经过4周的培养试验，NH_4-N基本转化为NO_3-N。在101 d内，土壤中积累了15%的无机氮。混消化牛粪与化肥处理籽粒产量差异不显著（p<0.05），但混消化牛粪处理籽粒蛋白质含量显著高于化肥处理（p<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).