Abstract
Switchgrass (Panicum virgatum L.) is a herbaceous perennial grass that can be used as bedding for livestock, planted in buffer strips, and used as biofuel, but it is still not widely grown in eastern Canada. The objectives of this study were to verify the performance of the Integrated Farm System Model (IFSM) in simulating switchgrass growth and to estimate its yield potential and production costs in eastern Canada. The performance of IFSM was assessed with dry matter (DM) yield of switchgrass (âCave-in-Rockâ) measured over three growing seasons (2015â2017) in southern Quebec, Canada. The model performed reasonably well, with normalized root mean square errors of 19.5% for calibration and 27.9% for validation. Simulation results of potential yield and economic management over the long term (1986â2015) for five switchgrass production sites in eastern Canada indicated that average DM yields in Quebec City and Fredericton (9.6 and 9.7 t haâ1, respectively) were significantly lower than average DM yields in Saint-Hubert, Ottawa, and London (10.8, 10.4, and 11.0 t haâ1, respectively). Average annual production costs per tonne of DM for the spring harvest were higher at low-yield sites (CAD$66.67 and $64.50 for Fredericton and Quebec City, respectively) than at high-yield sites ($60.10, $62.82, and $60.08 for Saint-Hubert, Ottawa, and London, respectively). The IFSM-estimated production costs were within the range of the calculated values reported in other agro-economic analyses conducted in Ontario and Quebec.
Highlights
La plupart des sélections cultivées au Québec ont été développées pour des régions plus au Sud (Summer: Dakota du Sud, Cave-In-Rock: Illinois)
Essais des nouveaux cultivars de panic érigé prometteurs
Des excÚs de potassium et de chlore sont impliqués dans la formation de produits nonsouhaitables dans les chaudiÚres
Summary
Le Panic Ă©rigĂ© est une herbe graminĂ©e prometteuse pour lâindustrie de la biomasse au QuĂ©bec. La plupart des sĂ©lections cultivĂ©es au QuĂ©bec ont Ă©tĂ© dĂ©veloppĂ©es pour des rĂ©gions plus au Sud (Summer: Dakota du Sud, Cave-In-Rock: Illinois). LâamĂ©lioration gĂ©nĂ©tique par sĂ©lection a produit de nouveaux cultivars qui pourraient ĂȘtre plus adaptĂ©s aux conditions QuĂ©becoises. Notre projet cherche a les Ă©valuer et les caractĂ©riser. Essais des nouveaux cultivars de panic Ă©rigĂ© prometteurs. â nombre de tiges par superficie â hauteur â date de progression des stages phĂ©nologiques â rendement de la biomasse â Proportion de tiges vĂ©gĂ©tatives et rĂ©productives â N,P,K,Ca,Mg,Al,B,Cu,Fe,Mn,Zn,Mo,Na,Ni,Cd,Cr,Co,Pb, Ba,Sr,S,Si,Cendres Ă 550°C, Chlorures
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