IVTDMDIn Vitro Total Dry Matter Digestibility
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The IVTDMD, CP, and fiber fractions were generally similar regardless of endophyte status (Table 8).
The composition of the hays differed among endophyte status for IVTDMD (P < 0.01) and CP (P < 0.01) (Table 8).
The greater dry matter intake obtained with goats fed MaxQ hay is consistent with its observed greater IVTDMD and CP and lower ADF and cellulose concentrations relative to the wild-type hay.
In the steer trial, differences were found mainly in IVTDMD, CP, and NDF concentrations.
Abbreviations: ADE acid detergent fiber; CE crude protein; IVTDMD, in vitro true dry, matter disappearance; MSD, minimum significant difference; NDE neutral detergent fiber.
Calibration and cross-validation results for NIRS analysis of TNC and IVTDMD concentrations in orchardgrass herbage.
The IVTDMD was again higher in the PM hays, the N[O.sub.3]-N was lower, and the crude protein did not differ.
Considering only significant effects across experiments, the mean effect of the PM harvest compared with the AM harvest was a 4 g [kg.sup.-1] decrease in hemicellulose, an 18 g [kg.sup.-1] increase in IVTDMD, a 3.7 g [kg.sup.-1] increase in monosaccharides, a 5.0 g [kg.sup.-1] increase in disaccharides, a 0.6 g [kg.sup.-1] increase in short chain polysaccharides, a 1.7 g [kg.sup.-1] increase in starch, and a 10.9 g [kg.sup.-1] increase in TNC.
The fiber fractions were increased while IVTDMD and CP were decreased in the orts.
On the other hand, MDS dimension 2 was correlated with NDF (r = -0.84, P = 0.03), hemicellulose (r = -0.93, P = 0.01), lignin (r = -0.80, P = 0.05), IVTDMD (r = 0.88, P = 0.02), disaccharides (r = 0.93, P = 0.01), short chain polysaccharides (r = 0.90, P = 0.01), and TNC (r = 0.92, P = 0.01).