EFFECT OF GROWTH STAGE AT HARVEST ON THE NUTRITIVE VALUE OF A GRAIN CORN GROWN FOR SILAGE

1969 ◽  
Vol 49 (3) ◽  
pp. 361-370 ◽  
Author(s):  
W. E. P. Davis ◽  
D. M. Bowden
Keyword(s):  
Dry Matter ◽  
Nutritive Value ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Growth Stages ◽  
Plant Yield ◽  
Whole Plant ◽  
High Level ◽  
Water Soluble Carbohydrate

The yield and nutritive value of whole plant, stalk, leaf, husk, and ear were studied for the corn hybrid Pioneer 383 at 8 weekly intervals following silking in 1966 and 1967. Percentage dry matter (DM) increased with maturity. Stalk percentage DM averaged 17.4% at the glazed stage, compared with 28.9% for the whole plant. Kernel percentage DM was 60% at the glazed stage for both years, with a ± 2% within-plot variation. The whole-plant yield of DM increased with maturity. Stalk, leaf, husk, and ear contributed 35, 14, 7, and 44% to whole-plant yield of DM. Total nitrogen (N) declined with maturity. Ear N averaged 65% of the whole-plant N. Water-soluble carbohydrate content of the whole plant was greatest for the second and third harvest and remained at a high level for all harvests. The yield of in vitro digestible dry matter (IVD DM) was greatest for the ear which contributed 52.8% of the total IVD DM, compared with 29.1, 13.4, and 7.6% for stalk, leaf, and husk. Digestible energy, obtained with wethers, was comparable for most growth stages. Both percentage digestible crude protein (CP) and g/kg DM CP showed a declining trend with maturity. DM intakes were lower than indicated by other studies.

scholarly journals Comparison of herbage yield, nutritive value and ensilability traits of three ryegrass species evaluated for the Irish Recommended List

2015 ◽  
Vol 54 (1) ◽  
pp. 31-40 ◽  
Author(s):  
G. A. Burns ◽  
P. O’Kiely ◽  
D. Grogan ◽  
S. Watson ◽  
T. J. Gilliland
Keyword(s):  
Perennial Ryegrass ◽  
Crude Protein ◽  
Dry Matter ◽  
Nutritive Value ◽  
Water Soluble ◽  
Italian Ryegrass ◽  
Soluble Carbohydrate ◽  
Dry Matter Digestibility ◽  
Water Soluble Carbohydrate

Abstract This study examined 169 of the newest varieties of three ryegrass species, perennial (Lolium perenne L.), Italian (Lolium multiflorum Lam.) and hybrid (Lolium boucheanum Kunth), from Recommended List trials in Ireland. The traits examined were yield, dry matter concentration, three nutritive value traits (in vitro dry matter digestibility, water-soluble carbohydrate on a dry matter basis and crude protein concentration) and two ensilability traits (buffering capacity and water soluble carbohydrate concentration on an aqueous phase basis). Varietal monocultures of each species underwent a six cut combined simulated grazing and silage management in each of two years following sowing. Perennial ryegrass yielded less than both other species in one-year-old swards, but less than only Italian ryegrass in two-year-old swards, but generally had the higher in vitro dry matter digestibility and crude protein values. Italian ryegrass displayed the most favourable ensilability characteristics of the three species with perennial ryegrass less favourable and hybrid ryegrass intermediate. Overall, despite the high yields and favourable nutritive value and ensilability traits recorded, the general differences between the three ryegrass species studied were in line with industry expectations. These findings justify assessing the nutritive value and ensilability of ryegrass species, in addition to yield, to allow farmers select species that match farming enterprise requirements.

Effect of spraytopping applications of paraquat and glyphosate on the nutritive value and regeneration of vulpia (Vulpia bromoides (L.) S.F. Gray)

1991 ◽  
Vol 42 (8) ◽  
pp. 1405 ◽  
Author(s):  
AR Leys ◽  
BR Cullis ◽  
B Plater
Keyword(s):  
Nutritive Value ◽  
Grain Filling ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Wagga Wagga ◽  
Time Of Application ◽  
Water Soluble Carbohydrate ◽  
Subsequent Regeneration ◽  
Earlier Application

The effects of paraquat and glyphosate on the nutritive value of dry residues of vulpia [Vulpia bromoides (L.) S. F. Gray], and its subsequent regeneration the following year were examined at Wagga Wagga during the spring, summer and winter of 1986/87 and 1987/88. Paraquat (100 and 200 g a.i./ha) and glyphosate (135 and 270 g a.i./ha) were applied as spraytopping treatments at heading, anthesis and early grain filling stages of vulpia. For both herbicides, time of application was critical to the level of regeneration obtained. Glyphosate gave 84 and 83% control when applied at heading and anthesis respectively, delaying application until early grain filling reduced the level of vulpia control to 28%. Paraquat gave 81% control when applied at anthesis, while delaying application until early grain filling, or earlier application at heading, gave 59% control. Crude protein (CP) and water-soluble carbohydrate (WSC) concentrations, and in vitro organic matter digestibilities (OMD) were measured in vulpia residues collected for 16 weeks after herbicide application. Paraquat increased CP levels most when applied at heading (from 4-8 to 7.2% in 1986, and from 4.9 to 6.5% in 1987). Glyphosate increased CP levels most when applied at heading in 1986 (from 4.8 to 5.4%), but at anthesis in 1987 (from 4.9 to 6.5%). Glyphosate increased WSC most when applied at heading (from 5.7 to 10.6% in 1986, and from 3.5 to 6.3% in 19871, while paraquat reduced WSC in both years. Application of glyphosate at heading was the only treatment to increase OMD (from 50.5 to 54.7%).

Effect of silage additives on the microbial succession and fermentation process of alfalfa and whole-plant maize silages

1992 ◽  
Vol 1992 ◽  
pp. 156-156
Author(s):  
K. K. Bolsen ◽  
B. E. Brent ◽  
Chunjian Lin
Keyword(s):  
Fermentation Process ◽  
Nutritive Value ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Microbial Succession ◽  
Maize Hybrids ◽  
Silage Fermentation ◽  
Whole Plant ◽  
Silage Production ◽  
Water Soluble Carbohydrate

Alfalfa is recognized as more difficult to ensile than maize. Typically, multiple alfalfa cuttings are harvested at various stages of maturity, and numerous maize hybrids that vary in their nutritive value are used for silage production in North America. The objective of these studies was to determine the effects of commercial bacterial inoculant and water soluble carbohydrate (WSC) additions on the microbial succession and silage fermentation process of two cuttings of alfalfa and three whole-plant maize hybrids.In 1989, second and fourth cuttings of alfalfa were mowed and swathed at the late-bud, 10% bloom, and 50% bloom stages of maturity within each cutting and wilted in the windrow for 5 to 6 hours prior to precision chopping. Three maize hybrids (Pioneer 3377, 3379, and 3389) were grown under irrigation in 1989 and harvested at the two-third milk line of kernel maturity.

Seasonal variation in the herbage yield and nutritive value of perennial ryegrass (Lolium perenne L.) cultivars with high or normal herbage water-soluble carbohydrate concentrations grown in three contrasting Australian dairy environments

1998 ◽  
Vol 38 (8) ◽  
pp. 821 ◽  
Author(s):  
K. F. Smith ◽  
R. J. Simpson ◽  
R. N. Oram ◽  
K. F. Lowe ◽  
K. B. Kelly ◽  
...  
Keyword(s):  
Perennial Ryegrass ◽  
Crude Protein ◽  
Dry Matter ◽  
Nutritive Value ◽  
High Water ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Dry Matter Digestibility ◽  
Acid Detergent Fibre ◽  
Water Soluble Carbohydrate

Summary. Two lines of perennial ryegrass (Lolium perenne L.), cv. Aurora and breeding line Ba 11351, from the United Kingdom with elevated concentrations of water-soluble carbohydrates in the shoot were compared with the standard cultivars, Ellett, Vedette and Kangaroo Valley, in pure grass swards under irrigation at Kyabram, Victoria, and Gatton, Queensland, and under natural rainfall at Condah, Victoria, during 1995–97. Near infrared reflectance spectroscopy was used to predict the water-soluble carbohydrate, crude protein, in vitro dry matter digestibility, neutral and acid detergent fibre, and Klason lignin concentrations of the perennial ryegrass herbage. Herbage yield and water-soluble carbohydrate differed between cultivars at each site at most harvests, with the high water-soluble carbohydrate lines usually yielding less and having higher water-soluble carbohydrate concentrations than the 3 standard cultivars. However, the high water-soluble carbohydrate lines also had higher water-soluble carbohydrate concentrations at harvests where their yield was equal to the standard cultivars. The other nutritive value traits differed significantly at more than half of the 32 harvests: the high water-soluble carbohydrate lines had higher crude protein and dry matter digestibility, and lower neutral detergent fibre, the neutral detergent fibre containing less acid detergent fibre and lignin than did the standard cultivars. The high water-soluble carbohydrate lines were more susceptible to crown rust during spring and summer than the standard cultivars at Kyabram and Gatton: heavy infections reduced yield, water-soluble carbohydrate, dry matter digestibility and crude protein. Higher water-soluble carbohydrate may depend on only a few genes, as does rust resistance and it seems likely that high yielding, high water-soluble carbohydrate cultivars can be developed by recombination and selection.

Effect of inoculants on fermentation and nutritive value of unwilted and wilted Lucerne silage

2009 ◽  
Vol 2009 ◽  
pp. 164-164
Author(s):  
F Hashemzadeh Cigari ◽  
M Hhorvash ◽  
G R Ghorbani ◽  
A Taghizade ◽  
K Sadegi ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Nutritive Value ◽  
Total Population ◽  
Lactic Acid Production ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Volatile Organic ◽  
High Level ◽  
Silage Inoculants ◽  
Water Soluble Carbohydrate

Homolactic bacteria have been used to inoculate silages and improve their fermentation. Inoculation with these microbes has increased the rate and extends of lactic acid production in silage and decreased proteolysis and production of volatile organic acid. Wilting of high moisture forages prior to ensiling usually enhances preservation and intake responses of cattle fed silage. Wilting creates an ensiling environment that is conducive to a restricted proteolysis and fermentation, and the resulting silage is typically higher in water soluble carbohydrate (WSC) and lower in fermentation acids. The microorganisms used in silage inoculants depend on a high level of moisture for growth. Pahlow and Weissbach (1996) reported that only 10% of the total population of epiphytic lactic acid bacteria (LAB) on grasses grew on modified, selective agar with an water activity (aw) of 0.952 (forage with a DM content of 50%), suggesting that epiphytic LAB were not very osmotolerant. However, Lucerne is often wilted to concentrations above 30% DM before ensiling to reduce the chances of clostridial fermentation and In these silages, it may be speculated that use of osmointolerant inoculants can include two Excellences of wilting and inoculants to make better silage. The aim of the present study was to assess the effects of wilting and inoculants on Lucerne silage quality.

INFLUENCE OF WATER-SOLUBLE CARBOHYDRATE AND CRUDE PROTEIN CONTENT ON IN VITRO DIGESTION OF DRY MATTER IN HIGHLY DIGESTIBLE FORAGES

1972 ◽  
Vol 52 (2) ◽  
pp. 151-156
Author(s):  
D. M. Bowden
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Cumulative Effect ◽  
In Vitro Digestion ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Freeze Dried ◽  
Influence Of Water ◽  
Water Soluble Carbohydrate

Freeze-dried samples from six series of harvests of orchardgrass (Dactylis glomerata L.) and two series of grass–legume mixtures were generally highly digestible with high levels of water-soluble carbohydrate (WSC). When WSC content was held constant, the influence of crude protein (CP) content on dry matter digested in vitro was statistically significant in 6 of the 19 cuts of orchardgrass and 1 of the 15 cuts of grass–legume mixtures. When CP was held constant, the influence of WSC content on dry matter digested in vitro was significant in seven cuts of orchardgrass and seven cuts of grass–legume. CP content had a greater effect than WSC content on dry matter digested in vitro in 10 cuts of orchardgrass and six cuts of grass–legume mixtures. Cumulative effect of CP and WSC content on in vitro dry matter digestion varied between cuts. The potential of CP and WSC content alone or together as predictors of digestibility of the highly digestible forages sampled in this study varied between cuts.

Rumen metabolism and nitrogen flow to the small intestine in steers offeredLolium perennecontaining different levels of water-soluble carbohydrate

2002 ◽  
Vol 74 (3) ◽  
pp. 587-596 ◽  
Author(s):  
M. R. F. Lee ◽  
L. J. Harris ◽  
J. M. Moorby ◽  
M. O. Humphreys ◽  
M. K. Theodorou ◽  
...  
Keyword(s):  
Small Intestine ◽  
Dry Matter ◽  
Water Soluble ◽  
Soluble Carbohydrate ◽  
Total N ◽  
Dry Matter Digestibility ◽  
Rumen Metabolism ◽  
And Control ◽  
Water Soluble Carbohydrate

AbstractEight Hereford ✕ Friesian steers were used to investigate the effect of feeding Lolium perenne (L) forage containing elevated levels of water-soluble carbohydrate (WSC) on rumen metabolism and nitrogen (N) absorption from the small intestine. The steers were offered ad libitum access to one of two varieties with matched heading dates (Ba11353, high WSC, HS; AberElan, intermediate WSC, control) cut at different times of the day to accentuate WSC differentials, zero-grazed for 21 days. This was followed by a 14-day period where the animals were on grass silage to provide a covariate intake. Although the total N concentration was similar for the two grasses, all other measured values were significantly different. The dry matter (DM) concentration of HS was greater than that of the control (202 v. 167 g DM per kg; P 0·01). WSC and in-vitro dry matter digestibility (IVDMD) were 243 and 161 g/kg DM, and 0·61 and 0·56 for HS and control, respectively. In contrast, acid- and neutral-detergent fibre were 251 and 296 g/kg DM and 480 and 563 g/kg DM for HS compared with control, respectively. DM intake was increased (9·3 v. 6·7 kg/day; P 0·001) for HS animals and this contributed significantly towards higher flows of non-ammonia N to the duodenum as well as increased absorption of amino acids from the small intestine. This DM intake response was partly due to the elevation in DM concentration of HS. However fresh weight intake was increased proportionately by ca. 0·15 (P 0·05) in animals on HS compared with control. Rumen ammonia levels were lower (14·0 and 26·4 mg N per l; P 0·001) and concentrations of rumen propionate higher (P 0·01) and acetate lower (P 0·01; increasing the glucogenic: lipogenic volatile fatty acid ratio) in animals on HS compared with control. However, the efficiency of microbial protein synthesis (15·9 and 17·8 g microbial nitrogen per kg organic matter apparently digested) and flow of N to the duodenum per unit N intake (0·84 and 0·93) for HS and control, respectively, were similar across both diets.

Chemical composition and in vitro digestibility of lines of Lolium perenne selected for high concentrations of water-soluble carbohydrate

1994 ◽  
Vol 45 (4) ◽  
pp. 901 ◽  
Author(s):  
I Radojevic ◽  
RJ Simpson ◽  
JA StJohn ◽  
MO Humphreys
Keyword(s):  
Perennial Ryegrass ◽  
Nutritive Value ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
In Vitro Digestibility ◽  
Dry Matter Digestibility ◽  
Nitrogen Concentrations ◽  
Water Soluble Carbohydrate

Differences in the water-soluble carbohydrate concentrations of herbage of northern European perennial ryegrass cultivars (Aurora, Melle, Cariad) grown under southern Australian conditions, and a New Zealand perennial ryegrass cultivar (Ellett) which yields well in southern Australia, were investigated in relation to their nutritive value. The water-soluble carbohydrates (WSC), total nitrogen, in vitro dry matter digestibility (IVDMD), neutral detergent fibre (NDF), and digestibility of NDF (NDFD) were measured in all cultivars. Aurora and Cariad exhibited higher WSC concentrations than the other cultivars, particularly during summer. This buffered the decline in IVDMD that was due to declining NDFD at that time of the year and resulted in an improvement in IVDMD of between 2 and 6%. Although WSC and nitrogen concentrations of the herbage were negatively correlated, this was due mainly to divergent seasonal variation in these components of the herbage.

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