Corn Response and Soil Nitrogen Transformations following Varied Application of Poultry Manure Treated to Minimize Odor

Macmillan, K.A.; Scott, T.W.; Bateman, T.W.

Canadian Journal of Soil Science 55(1): 29-34


ISSN/ISBN: 0008-4271
DOI: 10.4141/cjss75-005
Accession: 068494833

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The response of corn (Zea mays L.) to manure that had been treated to minimize odor was investigated in a greenhouse trial with two silt loam soils of p H 4.2 and 7.1. Pretreatment of manure resulted in sources initially high in organic N and NH4+, but low in NO3−. One pretreatment gave high initial NO2− concentrations. In soil at p H 4.2, NH4+ was the major N source utilized by corn grown to 36 days, and dry matter yields were superior to those from soil at p H 7.1 where soluble NO3− was the major source of N. At p H 7.1, NO2− remained in significant quantities and decreased dry matter yields at 6 wk. Soil inorganic N concentrations varied between soils and was attributed to soil p H differences. Rate of NO2− disappearance decreased with increase in soil p H, and NH4+ accumulation increased with decrease in soil p H, whereas NO3+ production was favored by neutral p H conditions. Some NO3− production was observed in p H.