Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Timothy Yield and Nutritive Value by the CATIMO Model

II. Digestibility and Fiber

Helge Bonesmoa and Gilles Bélanger*,b

a Norwegian Crop Res. Inst., Kvithamar Res. Cent., NO-7500 Stjordal, Norway
b Soils and Crops Res. and Dev. Cent., Agric. and Agri-Food Can., 2560 Hochelaga Blvd., Sainte-Foy, QC, Canada G1V 2J3



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Fig. 1. Simulated leaf and stem cell wall (CW) concentration and CW digestibility plotted against measured values for timothy grown under nonlimiting and limiting N conditions in three separate experiments. DM, dry matter.

 


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Fig. 2. Measured and simulated in vitro true dry matter (DM) digestibility (IVTD) of green leaves and stems of timothy grown under nonlimiting N conditions in three separate experiments. The data are from three cultivars in 1991, two cultivars in 1992, and one cultivar in 1993.

 


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Fig. 3. Measured and simulated in vitro true dry matter (DM) digestibility (IVTD) of green leaves and stems of timothy cv. Champ grown under two levels of N-limiting conditions in 1993 (N0, 0 g N m-2; N7, 7 g N m-2).

 


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Fig. 4. Simulated forage in vitro true dry matter (DM) digestibility (IVTD), cell wall (CW) digestibility, and CW concentration plotted against measured values for timothy grown under nonlimiting and limiting N conditions in four separate experiments.

 





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