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University of Alberta (2002)

Effects of liquid hog manure application to soils under semi-arid forage lands

Lambert Brian Douglas

Titre : Effects of liquid hog manure application to soils under semi-arid forage lands

Auteur : Brian Douglas Lambert

Université de soutenance : University of Alberta

Grade : (M.Sc.) 2002

Résumé
Despite expansions in hog production into semi-arid Alberta, limited information exists on the effects of liquid hog manure (LHM) to soils under permanent forages. This research was conducted to evaluate the effects of LHM applied to four sites (two tame pastures, two native rangelands), in two seasons (fall and spring), using two application methods (injection and broadcast), at five target rates of N (10, 20, 40, 80, 160 kg.ha -1 ). Changes in ammonia loss and soil nutrients following application were quantified. Greater LHM rates increased soil-N, but also increased ammonia loss. After one growing season, applied-N from LHM was depleted. Injecting LHM increased soil-N and reduced ammonia loss compared to broadcasting. Tame pasture soils experienced greater initial ammonia losses compared to native range, and showed marked declines in soil-N one year later. This research provides information relevant to producers and regulators to develop improved guidelines for applying LHM in semi-arid Alberta

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Page publiée le 25 janvier 2012, mise à jour le 2 février 2018