Détail de la notice
Titre du Document
Surface-banding liquid manure over aeration slots : A new low-disturbance method for reducing ammonia emissions and improving yield of perennial grasses
Auteur(s)
BITTMAN Shabtai ; VAN VLIET Laurens J. P. ; KOWALENKO C. Grant ; ...
Résumé
Low-disturbance methods for applying slurry manure on forages are needed that can maximize crop response and minimize loss of nutrients to the environment. A new implement [Aerway SSD (subsurface deposition slurry applicator)] that bands manure over aeration-type slots was assessed relative to conventional broadcasting and surface banding. The comparison was based on immediate and residual crop responses to single and multiple applications of dairy slurry by tall fescue (Festuca arundinacea Schreb.) and orchardgrass (Dactylis glomerata L.). Also, ammonia emissions were compared using both semiopen chamber and micrometeorological (integrated horizontal flux) methods. The aeration slots without manure generally did not have a significant effect on yield or N uptake. Averaged over all harvests, surface banding increased yield and N uptake over broadcasting by 6.9 and 6.8%, respectively. The SSD increased yield and N uptake over surface banding by 4.4 and 7.5%, respectively. The relative effectiveness of the techniques on yield varied among experiments. In the ammonia volatilization trials (micrometeorological method), loss of applied total ammoniacal N in the 2 wk after application ranged from 36 to 61% for broadcast manure compared with 17 to 32% for SSD-applied manure. With both micrometeorological and semiopen chamber, ammonia emissions from applied manure were 46 to 48% lower with the SSD than with broadcasting. Emissions from surface-banded manure (chamber method) averaged
Editeur
American Society of Agronomy
Identifiant
ISSN : 0002-1962 CODEN : AGJOAT
Source
Agronomy journal (Print) A. 2005, vol. 97, n° 5, pp. 1304-1313 [10 pages] [bibl. : 30 ref.]
Langue
Anglais
Pour les membres de la communauté du CNRS, ce document est autorisé à la reproduction à titre gratuit.
Pour les membres des communautés hors CNRS, la reproduction de ce document à titre onéreux sera fournie sous réserve d’autorisation du Centre Français d’exploitation du droit de Copie.

Pour bénéficier de nos services (strictement destinés aux membres de la communauté CNRS (Centre National de la Recherche Scientifique), de l'ESR français (Enseignement Supérieur et Recherche), et du secteur public français & étranger) :