Temporal and Vertical Distribution of Nonstructural Carbohydrate, Fiber, Protein, and Digestibility Levels in Orchardgrass Swards

Griggs, Thomas C.; MacAdam, Jennifer W.; Mayland, H. F.; Burns, J. C.

doi:10.2134/agronj2006.0036

Cited by 17 publications

(22 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NDFD of the 5-to 15-cm strata was significantly lower than for the 15-to 25-cm strata in 8 of 32 comparisons in 2009 (-76 g kg -1 NDFD) and in 9 of 33 comparisons in 2010 (-70 g kg -1 NDFD). Our results generally agreed with Griggs et al (2007), who reported that vertical distribution of digestibility in orchardgrass became less pronounced as the season progressed. The lowest strata (5 to 15 cm) tended to have low NDFD compared with the other strata, but when the canopy was fully developed, the uppermost strata often had the lower NDFD (DAC = 52, 75, 89, 114, and 160 in 2009;DAC = 44, 59, and 65 in 2010), probably because it consisted primarily of inflorescence.…”

Section: Measurementssupporting

confidence: 92%

“…For the May through August initiation dates, there were fewer significant NDFD differences among strata, and when they did occur, the lowest strata (5 to 15 cm) generally had lower NDFD than higher strata (Tables 3, 4). Our results generally agreed with Griggs et al (2007), who reported that vertical distribution of digestibility in orchardgrass became less pronounced as the season progressed.…”

Section: Measurementssupporting

confidence: 92%

“…There is limited information regarding vertical distribution patterns of nutritive value in cool-season grasses, especially for vegetative herbage (Burner and Belesky, 2004). More complete information could support decisions regarding cutting schedules, residual mass and heights to meet nutritional value targets, and the pasture allocation during grazing (Griggs et al, 2007).…”

Section: Changes In Forage Nutritive Value Among Vertical Strata Of Amentioning

confidence: 99%

See 2 more Smart Citations

Changes in Forage Nutritive Value among Vertical Strata of a Cool‐Season Grass Canopy

et al. 2014

View full text Add to dashboard Cite

2837ReseaRch S easonal variation in forage growth rate is a fundamental constraint on grazing system management. Pasture stocking rates and supplemental feed requirements are influenced by the dynamic balance between forage growth and the amount of herbage consumed by the animals. There is considerable variation in growth rate of cool-season grasses from year to year and season to season; however, in the Appalachian plateau, the growth rate of tall fescue [Schedonorus arundinaceus (Schreb.) Dumort., nom. cons., formerly Festuca arundinacea Schreb.] is usually highest in late spring (May to early June), while autumn (September to October) growth rate is generally less than or equal to rates during the summer months (mid-June to August) with adequate rainfall (Denison and Perry, 1990). Grazing strategies should allow flexibility in adjusting to changes in growth of the pasture grasses over the season.While grazing strategies should account for the seasonal variations in growth rate of forage grasses, changes in nutritive value of the forage are also an important consideration in managing

show abstract

Section: Measurementssupporting

confidence: 92%

Section: Measurementssupporting

confidence: 92%

Section: Changes In Forage Nutritive Value Among Vertical Strata Of Amentioning

confidence: 99%

See 1 more Smart Citation

Changes in Forage Nutritive Value among Vertical Strata of a Cool‐Season Grass Canopy

et al. 2014

View full text Add to dashboard Cite

show abstract

“…, 1999; Huntington and Burns, 2007). In cocksfoot, however, the time of harvest in the day had a limited effect on NDF concentration and DM digestibility (Griggs et al. , 2007).…”

Section: Discussionmentioning

confidence: 99%

Yield and nutritive value of timothy as affected by temperature, photoperiod and time of harvest

Bertrand

Tremblay

Pelletier

et al. 2008

Grass and Forage Science

View full text Add to dashboard Cite

Scenarios of global climate change forecast an increase in air temperature of 3°C over the next 100 years in eastern Canada. Growth and nutritive value of cool-season grasses are known to be affected by air temperature. It is also believed that grasses grown at high latitude have a greater nutritive value. The objectives of this study were to assess the effect of four combinations of day ⁄ night temperature and photoperiod (15 h-17 ⁄ 5°C; 15 h-22 ⁄ 10°C; 15 h-28 ⁄ 15°C; and 17 h-17 ⁄ 5°C) on dry-matter (DM) yield, in vitro true DM digestibility (IVTD), in vitro digestibility of neutraldetergent fibre (NDF), and concentrations of NDF, acid-detergent fibre (ADF), lignin, minerals and nonstructural carbohydrates (NSC) in timothy grown under controlled conditions. Furthermore, herbage was harvested in the morning and in the afternoon to assess the impact of the time of harvest. The dietary cation-anion difference [DCAD = (K + + Na + ) ) (Cl ) + 0AE6 S 2) )] and the grass tetany index [GT index = K + ⁄ (Ca 2+ + Mg 2+ )] were also calculated. Higher temperature regimes significantly decreased IVTD and digestibility of NDF but had a limited effect on concentrations of NDF, ADF and lignin. DM yield of herbage was less and the concentration of NSC was greater in timothy grown under a temperature regime of 28 ⁄ 15°C than the 17 ⁄ 5°C and 22 ⁄ 10°C regimes; this effect is mainly explained by a response to temperature stress. Values of DCAD and the GT index of herbage were also lower under the 28 ⁄ 15°C than the 17 ⁄ 5°C and 22 ⁄ 10°C regimes as a result of a decreased plant K concentration. Under the 17 ⁄ 5°C regime, an increase in 2 h of photoperiod resulted in increased DM yield, decreased concentrations of K, Ca, Mg, Cl and N, and an increased starch concentration; IVTD or digestibility of NDF were not affected, although lignin concentration was reduced.Harvesting timothy in the afternoon rather than in the morning resulted in higher NSC, mainly sucrose, concentrations, and decreased ADF and NDF concentrations. The forecasted increase in air temperature in eastern Canada over the next 100 years will result in lower yields and nutritive value of timothy.

show abstract

“…During the rainy season After collecting samples from 1 m 2 quadrat, the whole plot was cut to allow the homogenous regrowth for the next cut. Biomass samples from 1 m 2 quadrat were oven dried at 105°C to constant mass to give dry matter production estimates during the study period (Griggs et al, 2007). Samples taken from dried grasses were chemically analysed according to the recommendations of AOAC (1990) once in the wet season and once in the dry season for crude protein content, phosphorus and calcium.…”

Section: Evaluation Of Quantity and Quality Of Foragementioning

confidence: 99%

On-farm evaluation of improved Brachiaria grasses in low rainfall and aluminium toxicity prone areas of Rwanda

Mutimura¹,

Everson²

2012

Int. J. Biodvers. Conserv.

View full text Add to dashboard Cite

The aim of this study was to determine the production of improved Brachiaria grass in comparison with indigenous Brachiaria under low rainfall and aluminium toxicity areas of Rwanda. Three varieties and five hybrids of Brachiaria grass from CIAT and two local grasses (control) were used for on-farm participatory trials without fertilizer application. Twelve farms were selected in each study area and on each farm ten grasses were established in 2 × 3 m plots. Herbage was harvested six times during the year at two monthly intervals. Each cut, dry matter (DM) was measured. The crude protein (CP), calcium (Ca) and phosphorus (P) were also measured once in the wet season and once in the dry season. In the low rainfall area, Brachiaria brizantha cv. Toledo and Brachiaria decumbens (local) had the highest DM yields (5.71 and 5.61 t ha -1 respectively), while DM of the rest of the grasses ranged from 1.2 to 5.13 t ha -1 . In the acidic soil area, Brachiaria hybrid Bro2/1485 had higher DM (5.95 t ha -1 ) than the rest of the grasses (1 to 4.47 t ha -1 ). The highest quality grass was Brachiaria hybrid Bro2/1485 which obtained a CP value of 12.15% in the low rainfall area, whereas in the acidic soil area hybrid cv. Mulato II obtained the highest CP value of 11.6%. In the low rainfall area the Brachiaria hybrid cv. Mulato obtained a high mean Ca value of 2.15% while in the acidic soil area, cv. Marandu obtained a high Ca value of 2.41% during the wet and dry seasons. The cv. Toledo had high P (0.28%) compared to the other grasses (0.07 to 0.11%) in the low rainfall area. In the acidic soil area, the Brachiaria hybrid Bro2/1485 had high P of 0.53% as compared to other grasses in which P varied between 0.16 and 0.47%. Local control grasses had lower nutrients than the improved Brachiaria grass in the low rainfall and acidic soil area. Although, Brachiaria hybrid cv. Mulato II was not the most productive grass, it was selected by farmers as the preferred cultivar at both sites because of its adaptability to low rainfall and acidic soil stress, and its production of green forage year round without any input of fertilizer.

show abstract

Temporal and Vertical Distribution of Nonstructural Carbohydrate, Fiber, Protein, and Digestibility Levels in Orchardgrass Swards

Cited by 17 publications

References 33 publications

Changes in Forage Nutritive Value among Vertical Strata of a Cool‐Season Grass Canopy

Changes in Forage Nutritive Value among Vertical Strata of a Cool‐Season Grass Canopy

Yield and nutritive value of timothy as affected by temperature, photoperiod and time of harvest

On-farm evaluation of improved Brachiaria grasses in low rainfall and aluminium toxicity prone areas of Rwanda

Contact Info

Product

Resources

About