Soluble carbohydrate content of ryegrass cultivars

Easton, H. S.; Stewart, Alan V.; Lyons, T. B.; Parris, M.; Charrier, S.

doi:10.33584/jnzg.2009.71.2745

Cited by 18 publications

(22 citation statements)

References 16 publications

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“…Differences can be attributed to many reasons for instance a complex function of environmental factors such as irradiance, temperature, water availability (Humphreys et al, 2006) and/or plant factors such as maturity and the inherent differences between CVS (Stewart and Hayes, 2011). Despite this, the higher WSC concentration in the marketed high sugar ryegrasses are consistent in some studies (Cosgrove et al, 2007;Easton et al, 2009;Wims et al, 2013), but not in others (Parsons et al, 2004;Hume et al, 2010).…”

Section: Discussionsupporting

confidence: 58%

Concentración de carbohidratos solubles en agua y nitrógeno posterior a la defoliación en ballicas perennes (Lolium perenne L.) en primavera

Moscoso

Balocchi

2016

agrosur

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It is well documented that water-soluble carbohydrates (WSC) and nitrogen (N) are sources to start growth after defoliation, but there is little information about the concentration changes postdefoliation when normal and high sugar cultivars (CVS) are used under field conditions. The objective of this study was to evaluate, every three days, the WSC and N concentration change in stubble and regrowth of four perennial ryegrasses (AberAvon, AberDart AR1, Arrow AR1 and Jumbo). There was no interaction between CVS and day after defoliation on the WSC or N concentration for each tissue (p > 0.05). There were effects of time after defoliation in both tissues (p < 0.05). The WSC concentration on the stubble declined until day nine (148.9 g kg-1 DM), reaching initial levels on day 18 after defoliation (198.8 g kg-1 DM). In the regrowth the values changed from 114.4 to 159.5 g kg-1 DM, respectively. The N concentration in the stubble and regrowth increased up to day 9 (26.4 g kg-1 DM) and day 12 (38.2 g kg-1 DM), respectively. Later, there was a steady decline until the end of the regrowth period with N concentrations of 20.4 and 27.8 g kg-1 DM for stubble and regrowth, respectively. The results indicate that the use of CVS marketed as high sugar do not bestow any advantage in terms of higher concentrations of WSC in different tissues after defoliation.

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Section: Discussionsupporting

confidence: 58%

Concentración de carbohidratos solubles en agua y nitrógeno posterior a la defoliación en ballicas perennes (Lolium perenne L.) en primavera

Moscoso

Balocchi

2016

agrosur

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“…At each sampling time, fresh grass pooled samples of approximately 150 g per plot were taken, using hand shear to a simulated grazing height of 5 cm. Sampling was achieved, block by block, within a short window around noon (Easton, Stewart, Lyons, Parris, & Charrier, ; Parsons et al., ) to avoid complications due to diurnal patterns of WSC metabolism, frozen immediately in liquid N 2 on site to prevent WSC wastage post‐harvest, stored at −20°C until freeze dried and then ground through a 1 mm sieve.…”

Section: Methodsmentioning

confidence: 99%

Does the “high sugar” trait of perennial ryegrass cultivars express under temperate climate conditions?

Rivero

Balocchi

Moscoso

et al. 2019

Grass and Forage Science

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The objective was to evaluate water‐soluble carbohydrate (WSC) and crude protein (CP) concentration of perennial ryegrass (PRG) cultivars with different genetic potential for producing WSC under two contrasting agronomic managements in temperate climate (southern Chile). A 4 × 2 factorial design was randomly allocated to 24 plots (31 m2 each, three blocks): four PRG cultivars (diploid standard cultivar, “2nSt”; tetraploid standard cultivar, “4nSt”; diploid high sugar cultivar developed in New Zealand, “2nHSNZ”; and tetraploid high sugar cultivar developed in Europe, “4nHSEU”) and two agronomic managements (“favourable,” defoliations at three leaves per tiller and nitrogen (N) fertilization rate of 83.3 kg N ha−1 year−1; “unfavourable,” defoliations at two leaves per tiller and N fertilization rate of 250 kg N ha−1 year−1). Herbage samples were collected in early spring, spring, summer and autumn. Concentration of WSC did not differ among cultivars in spring and summer, averaging 194 and 251 g/kg DM, respectively. The cultivar 4nHSEU had the greatest WSC concentration in early spring and autumn (187 and 266 g/kg DM, respectively) and the greatest CP concentration across samplings (average 230 g/kg DM). Favourable management improved WSC concentrations in early spring and summer and decreased CP in spring, summer and autumn. Annual DM yield did not vary with cultivar or management, averaging 8.43 t/ha. Within a 12‐month study at one site in a temperate environment in southern Chile, PRG cultivars have not shown a consistent expression of the “high sugar” trait, where a genetic × environment interaction might be operating.

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“…Two cultivars of perennial ryegrass (Lolium perenne L.) were used in the study, namely AberMagic AR1 (+19) developed in Wales and Expo AR1 (+21) developed in New Zealand. The cultivars were selected because both expressed higher concentrations of WSC [28], were developed in different latitudes, have similar heading dates and are both diploids. Nine 125 L (0.48 m diameter × 0.91 m height) pots were filled in March 2016 with an Andisol soil of the Osorno series (textural class: silty loam) characterized by 13%, 70% and 17% of sand, silt and clay, respectively [29].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Drying Methods on Water-Soluble Carbohydrates and Crude Protein Concentrations and Their Ratio in Two Perennial Ryegrass Cultivars

2019

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The objective of this study was to assess the joint effect of perennial ryegrass cultivars and drying methods on concentrations of water-soluble carbohydrates (WSC) and crude protein (CP) and WSC/CP ratio. AberMagic AR1 and Expo AR1 forage were collected in December 2016, March, June, September and November 2017 and either oven-dried at 60 °C for 48 h (OD_60), at 80 °C for 16 h (OD_80), frozen at −80 °C for 48 h then freeze-dried (−80_FD), or flash-frozen with liquid N then freeze-dried (LN_FD). Data were analyzed by ANOVA in a factorial design with cultivar and drying method as factors. AberMagic AR1 had between 9.0 to 31.5% higher WSC concentration than Expo AR1 in the four samplings. Freeze-drying preserved more WSC than oven-drying treatments (+22.7%), particularly in June. The CP concentration of Expo AR1 was higher only in December (+6.8%), and was 22.9 and 10.9% higher in OD_60 samples compared to LN_FD samples in December and November, respectively. The WSC/CP ratio varied in June, being greater in AberMagic AR1 (+36.1%). Drying method affected WSC/CP ratio in December, June and November where freeze-drying produced greater ratios. Drying techniques generated differences in WSC, CP and WSC/CP ratio, which may affect the accuracy of the estimated impacts of forages on productivity and N use efficiency.

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Soluble carbohydrate content of ryegrass cultivars

Cited by 18 publications

References 16 publications

Concentración de carbohidratos solubles en agua y nitrógeno posterior a la defoliación en ballicas perennes (Lolium perenne L.) en primavera

Concentración de carbohidratos solubles en agua y nitrógeno posterior a la defoliación en ballicas perennes (Lolium perenne L.) en primavera

Does the “high sugar” trait of perennial ryegrass cultivars express under temperate climate conditions?

The Effect of Drying Methods on Water-Soluble Carbohydrates and Crude Protein Concentrations and Their Ratio in Two Perennial Ryegrass Cultivars

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