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Nitrogen Availability from Composts for Humid Region Perennial Grass and Legume–Grass Forage Production

D. H. Lyncha,*, R. P. Voroneyb and P. R. Warmana

a Department of Environmental Science, Nova Scotia Agricultural College (NSAC), P.O. Box 550, Truro, NS, Canada B2N 5E3
b Department of Land Resource Science, University of Guelph, Guelph, ON, Canada N1G 2W1



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  		Fig. 1. Cumulative forage dry matter yields as affected by forage crop and fertility treatment. The term CONT is control; NREC and NHIGH are inorganic N fertilizer at recommended and high rates, respectively; DM is dairy manure; and DMC, SSLC, and CSC are compost produced from dairy manure, sewage sludge, and corn silage, respectively. Units in treatment title refer to annual application rates in kg total N ha–1 yr–1. Within each crop, columns with different letters are significantly different at the 0.05 probability level.

 


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  		Fig. 2. Cumulative crop nitrogen offtake as affected by forage crop and fertility treatment. The term CONT is control; NREC and NHIGH are inorganic N fertilizer at recommended and high rates, respectively; DM is dairy manure; and DMC, SSLC, and CSC are compost produced from dairy manure, sewage sludge, and corn silage, respectively. Units in treatment title refer to annual application rates in kg total N ha–1 yr–1. Within each crop, columns with different letters are significantly different at the 0.05 probability level.

 




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