Yield and nutritive value of the spring growth of an ageing timothy sward

Bélanger, Gilles; Tremblay, Gaëtan F.; Mongrain, Danielle

doi:10.4141/cjps07154

Cited by 29 publications

(20 citation statements)

References 9 publications

(18 reference statements)

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“…The herbage DM accumulation rates in primary growth were slightly less than those reported by Bélanger and Richards (1997) (0.0132 Mg DM ha −1 °C d) and Bélanger et al (2008) (0.0125 Mg DM ha −1 °C d) for timothy in eastern Canada but similar to those of timothy–meadow fescue ( Festuca pratensis Huds.) mixtures in Finland reported by Pulli (1980) (0.0100 Mg DM ha −1 °C d) and Kuoppala et al (2008) (0.0093 Mg DM ha −1 °C d).…”

Section: Resultscontrasting

confidence: 56%

Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

et al. 2012

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Herbage dry matter (DM) yield of grasses is a function of the density and size of vegetative (VEG), generative (GEN), and elongating vegetative (ELONG) tillers. We determined the contribution of these tbree tiller types to DM yield accumulation along with their main morphological characteristics on three sampling dates during each of the primary growth and the regrowth of field-grown swards of timothy (Phleum pratense L.) and tall fescue (Festuca arundinacea Scbreb.). Our results provide the first quantitative characterization of ELONG tillers, which contributed to timothy DM yield by up to 28% in primary growth and 58% in regrowth. In tall fescue, VEG tillers were dominant in primary growth and regrowth (74 to 100% of DM yield). The GEN tillers were dominant (67 to 74% of DM yield) in the primary growth of timothy while in the regrowth, VEG tillers were dominant early (84% of DM yield) but ELONG tillers represented 58% of DM yield later on. Timothy and tall fescue had similar rates of DM accumulation. The greater DM yield on all sampling times of the regrowth of tall fescue confirms a greater growth before the first sampling, most likely due to the greater proportion of VEG tillers. The GEN tillers were large with low leaf to weight ratio (LWR) and proportion of attached senesced material whereas VEG tillers were small with high LWR and large proportion of attached senesced material. The ELONG tillers were intermediate in size and LWR but they had a low proportion of attached senesced material.

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Section: Resultscontrasting

confidence: 56%

Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

et al. 2012

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“…These changes with time are small compared with those reported in the literature. Bélanger and McQueen (1998) reported that the NDF concentration of timothy, a grass species widely grown in eastern Canada, increased with maturity; an increase of 98 g NDF kg −1 DM between stem elongation and early flowering (about 3 wk) was reported by Bélanger et al (2008). The change in NDF concentration with maturity in our study might have been masked by the increase in WSC concentration; an increase in the proportion of one component will necessarily affect the proportion of other components as the sum of all components must be equal to 1.0.…”

Section: Discussionmentioning

confidence: 99%

Sweet Pearl Millet Yields and Nutritive Value as Influenced by Fertilization and Harvest Dates

et al. 2012

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Sweet pearl millet [Pennisetum glaucum (L.) R.Br.] can be used for ethanol production from the extracted juice with residues used as livestock feed, but optimal fertilization and harvest dates are unknown for this "sugary stem" hybrid developed from forage pearl millet. We evaluated the eff ects of fi ve equally spaced N fertilization rates (0-200 kg ha -1 ), K fertilization rates of 0 and 66 kg ha -1 , and four harvest dates (approximately every 15 d from early or mid-August in 2007 and 2008) on water soluble carbohydrate (WSC) concentration and yield, dry matter (DM) yield, and nutritive value of sweet pearl millet, at two sites with 2300 to 2500 and 2900 to 3100 crop heat units (CHU) in Québec, Canada. Delaying harvest dates increased DM (22-99%) and WSC yields (98-173%), and WSC concentration but decreased N concentration by 36% and neutral detergent fi ber digestibility (dNDF) by 19%. Increasing N fertilization increased DM and WSC yields, and N concentration, but had no eff ects on WSC concentration, and decreased dNDF moderately. Potassium fertilization had limited eff ects on DM and WSC yields, WSC concentration, and on most attributes of nutritive value. Fertilization with 78 to 90 kg N ha -1 and an accumulation of 2100 to 2200 CHU corresponding to harvest dates in September are required to maximize WSC yield (1.86-2.83 Mg ha -1 ) of sweet pearl millet in eastern Canada. Maximizing WSC yield with the goal of producing ethanol, however, would result in reduced nutritive value.

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“…Crop P uptake was measured only at harvest in Fredericton and in the Quebec 1 and 2 experiments. More details on the field experiments can be found in Richards (1995, 1997) for the Fredericton site, Chantigny et al (2007) and Be´langer et al (2008) for the Quebec site, and Je´go et al (2013) Table 1) at all sites. Crop N and P uptake and NDF concentration were measured at harvest at the Fredericton, Quebec, and Normandin sites.…”

Section: Field Experimentsmentioning

confidence: 99%

Simulating forage crop production in a northern climate with the Integrated Farm System Model

et al. 2015

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. 2015. Simulating forage crop production in a northern climate with the Integrated Farm System Model. Can. J. Plant Sci. 95: 745Á757. Whole-farm simulation models are useful tools for evaluating the effect of management practices and climate variability on the agroenvironmental and economic performance of farms. A few process-based farm-scale models have been developed, but none has been evaluated in northern regions with boreal and hemiboreal climates characterized by a short growing season and a long period with snow cover. The study objectives were to calibrate the grass sub-model of the Integrated Farm System Model (IFSM) and evaluate its predictions of yield and nutritive value of timothy and alfalfa, grown alone or in a mixture, using experimental field data from across Canada, and to assess IFSM's predictions of yield of major annual crops grown on dairy farms in eastern Canada using regional yield data from two contrasting regions. Several timothy and alfalfa datasets combining sites, years, harvests, and N fertilization rates were used to calibrate and evaluate the model. For timothy and alfalfa, the model's accuracy was globally satisfactory in predicting dry matter yield and neutral detergent fiber concentration with a normalized root mean square error (NRMSE) B30%. For N uptake, the scatter was a bit larger, especially for timothy (NRMSE 049%), mainly because of a small range in the measured data. The model's accuracy for predicting the yield of annual crops was generally good, with an NRMSE B30%. Adding timothy and alfalfa to the grass sub-model of IFSM and verifying the model's performance for annual crops confirmed that IFSM can be used in northern regions of North America. In addition, the model was able to simulate the yield and nutritive value of a timothyÁalfalfa mixture, which is the most common perennial mixture used in Canada.Key words: Integrated Farm System Model, timothy, alfalfa, mixture, dairy farm, Canada Je´go, G., Rotz, C. A., Be´langer, G., Tremblay, G. F., Charbonneau, E. et Pellerin, D. 2015. Simulation de la production fourrage`re en climat nordique avec le mode`le IFSM (Integrated Farm System Model). Can. J. Plant Sci. 95: 745Á757. Les mode`les qui permettent de simuler le fonctionnement des exploitations agricoles sont des outils utiles pour e´valuer l'effet des pratiques agricoles et de la variabilite´du climat sur la performance agro-environnementale et e´conomique de ces exploitations. Quelques mode`les me´canistes et fonctionnant a`cette e´chelle ont e´te´de´veloppe´s au cours des dernie`res anne´es, mais aucun n'a e´te´e´value´dans les re´gions nordiques au climat bore´al ou semi-bore´al caracte´rise´s par une saison de croissance courte et une longue pe´riode avec couvert de neige. Les objectifs de cette e´tude e´taient d'une part de calibrer le sous-mode`le « prairies » du mode`le IFSM « Integrated Farm system Model » et d'e´valuer la performance du mode`re pour pre´dire le rendement et la valeur nutritive de la fle´ole des pre´s et de la luzerne, cultive´es seules ou ...

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Yield and nutritive value of the spring growth of an ageing timothy sward

Cited by 29 publications

References 9 publications

Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

Tiller Characteristics of Timothy and Tall Fescue in Relation to Herbage Mass Accumulation

Sweet Pearl Millet Yields and Nutritive Value as Influenced by Fertilization and Harvest Dates

Simulating forage crop production in a northern climate with the Integrated Farm System Model

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