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A bioassay of nitrogen availability in soils amended with manure from cattle fed dried distiller grains with solubles: effects of construction and demolition waste and peat moss
- Agomoh, Ikechukwu, Zvomuya, Francis, Hao, Xiying, McAllister, Tim A.
- Canadian journal of soil science 2017 v.98 no.1 pp. 27-44
- Brassica napus, Chernozems, Sphagnum, beef cattle, bioassays, canola, diet, dry matter accumulation, feedlots, greenhouses, leaching, mineralization, nitrapyrin, nitrates, nitrification inhibitors, nitrogen, nitrogen fertilizers, peat, sandy clay loam soils, wastes
- The use of construction and demolition waste (CDW) and peat moss as bedding in beef cattle feedlots may affect the amount of plant-available nitrogen (N) in manure. Such an effect, however, may differ between manure from cattle fed a regular grain diet (RM) and those fed dried distiller grains with solubles (DGM). We used five 40 d crop cycles in a greenhouse bioassay to determine the effects of RM and DGM manure containing CDW or peat moss on canola (Brassica napus L.) growth and N uptake in a Black Chernozem (loam, Typic Hapocryoll) and a Brown Chernozem (sandy clay loam, Aridic Haploboroll) with or without the addition of a nitrification inhibitor (nitrapyrin) in each cycle to minimize nitrate (NO₃) leaching. Our results showed that the presence of CDW in DGM and RM manure depressed (P < 0.05) cumulative dry matter yield (CDMY) and N uptake in canola relative to manure without CDW, whereas the presence of peat increased (P < 0.05) CDMY and N uptake. Results suggest that it may be necessary to supplement CDW-amended DGM and RM manure with synthetic N fertilizer to supply adequate available N for plant uptake because the addition of CDW decreases organic N mineralization.