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Concentrations of CP and dNDF were positively correlated with LSR (r = 0.64 and 0.57, respectively; P < 0.01), whereas NDF concentrations were negatively correlated (r = -0.42; P < 0.01).
Abbreviations: CP, crude protein; dNDF, digestible neutral detergent fiber: IVTD, in vitro true digestibility; LSR, leaf-to-stem mass ratio: NDF, neutral detergent fiber: SLA, specific leaf area.
Big Flats, NY Accession or cultivar Origin CP ([dagger]) NDF dNDF g [kg.sup.-1] g [kg.sup.-1] dry matter NDF 9080166 WV 188 464 665 9085135 WV 220 450 712 9080130 DC 184 492 658 9080131 MD 191 467 680 9085126 MD 176 475 650 9085140 MD 193 468 688 9085157 MD 210 451 691 Southern mean 195 467 678 9051823 Ontario 162 481 624 9051827 Ontario 154 482 631 9051825 NH 182 475 653 9051829 NY 153 478 648 9051824 VT 156 511 623 9085161 PA 178 467 690 Commercial ecotype PA 174 465 673 Northern mean 166 480 649 Bottlebrush mean 181 474 664 Orchardgrass mean 148 616 652 SE 4.9 6.0 7.4 Contrasts ([double dagger]) Bottlebrush vs.
Orchardgrass had higher concentrations of NDF and lower concentrations of CP and dNDF (except at Beltsville) than the Elymus entries.
Differences among accessions in dNDF were not as clear cut (Table 4).
Concentrations of dNDF were not different between Elymus and orchardgrass at Beltsville perhaps because orchardgrass produced more vegetative tillers per plant than did Elymus (Sanderson et al., 2004), which may have affected relative nutritive value differences between species.
Concentrations of NDF were negatively correlated with LSR in each year and each location, whereas CP and dNDF were positively correlated with LSR (except dNDF at Rock Springs in 2001; Table 7).
There was a significant cultivar x harvest date interaction for NDF, DNDF, and IVTD (Table 3).
There were differences among cultivars for DNDF from December through March.
Abbreviations: CP, crude protein; DM, dry matter; DNDF, digestible neutral detergent fiber; IVTD, in vitro true digestibility; NDF, neutral detergent fiber; NIRS, near infrared reflectance spectroscopy.
The positive linear pattern for TDN intake with protein supplementations (Table 6) seems to reflect the increase in consumption and coefficients of digestibility (Table 7) of CP, EE, and NFC, with no significant increase in the extraction of energy from NDFap because there was no effect on the consumption of digested NDF (dNDF) (Tables 5 and 6).
Thus, it was expected an increase in NDFap and dNDF intakes by increasing the level of supplementation, however, this did not occur, probably by restricting the mass of pasture DM.
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- DND (disambiguation)
- DND CIO
- Dneiper River