Nutritive value of pasture: I. Seasonal variations in the productivity, botanical and chemical composition, and nutritive value of medium pasturage on a light sandy soil

1926 ◽  
Vol 16 (2) ◽  
pp. 205-274 ◽  
Author(s):  
Herbert Ernest Woodman ◽  
Denzil Layton Blunt ◽  
James Stewart
Keyword(s):  
Chemical Composition ◽  
Sandy Soil ◽  
Seasonal Changes ◽  
Nutritive Value ◽  
Weather Conditions ◽  
Pasture Grass ◽  
Initial Stage ◽  
Poa Trivialis ◽  
Medium Quality ◽  
Bromus Mollis

An account has been given of an investigation into the seasonal changes in the productivity, botanical and chemical composition, and nutritive value of pasture grass, the work constituting the initial stage of a comprehensive study of the nutritive properties of different types of pasture. The pasture on which the work was carried out was situated on a light sandy soil of low water-retaining capacity; the pasturage was of medium quality.Grazing was imitated by the daily use of a motor-mowing machine, the system of cutting being such as to ensure the whole plot being cut over once per week. The season was divided into ten periods, each period corresponding with the duration of a digestion trial carried out on two wether sheep. The main feature of the weather conditions during the season was the extremely low rainfall during the period from early June to mid-July.The pasture plot results were compared with corresponding results obtained from contiguous plots which were allowed to grow for hay, and from which, after removal of hay, several successive aftermath cuts were taken. The main findings of the investigation are summarised below:Seasonal changes in the botanical composition of the herbage. Although precise and systematic botanical analyses of the herbage of the pasture were not carried out, yet careful surveys made at an early and a late date in the season, together with general observations made during the whole course of the experiment, enabled interesting conclusions to be drawn in respect of the seasonal activity and persistency of the different species of grasses in the sward. During the spring season,Bromus mollis, Lolium perenne, Poa annuaandPoa trivialisaccounted for almost 80 per cent, of the herbage.

The composition and nutritive value of bracken

1949 ◽  
Vol 39 (3) ◽  
pp. 296-301 ◽  
Author(s):  
F. E. Moon ◽  
A. K. Pal
Keyword(s):  
Chemical Composition ◽  
Opposite Direction ◽  
Nutritive Value ◽  
Potassium Content ◽  
Tannin Content ◽  
Crude Fibre ◽  
Pasture Grass ◽  
Soluble Part ◽  
Cattle And Sheep

Samples of bracken were taken at regular intervals between June and October from a hill grazing where losses of cattle from ‘bracken poisoning’ had occurred in previous years. These were separated into leaf and stem for analysis. Dry, mature bracken cut in October was examined for digestibility and nutritive value, and in the following season the digestibility of fresh, green bracken was determined for both cattle and sheep.Chemical composition. Analyses of the fresh bracken fed in the digestibility trials were in line with those of the samples collected in the previous year. Crudeprotein content was high in June and July, but fell markedly in August and September, whilst the crude fibre varied in the opposite direction, increasing markedly in August. An increase in the tannin content was observed in September but this was not comparable with the increases reported by Shearer. An attempt to elucidate the significance of tannin in the in vitro digestion of bracken-leaf protein was unsuccessful. The potassium content was found to be rather lower than in good pasture grass, confirming the findings of Ferguson & Armitage. The potassium was highly soluble in water but the soluble part was not entirely in the form of chloride.

Nutritive value of pasture. III. The influence of the intensity of grazing on the composition and nutritive value of pasture herbage (Part I)

1928 ◽  
Vol 18 (2) ◽  
pp. 266-296 ◽  
Author(s):  
H. E. Woodman
Keyword(s):  
Chemical Composition ◽  
Crude Protein ◽  
Dry Matter ◽  
Nutritive Value ◽  
The Other ◽  
Protein Concentrate ◽  
Crude Fibre ◽  
Pasture Grass ◽  
Main Trial ◽  
Feeding Value

The present investigation was undertaken with the object of ascertaining the effect of cutting at fortnightly instead of weekly intervals on the yield of pastures, and on the composition, digestibility and nutritive value of the herbage.The main trial was carried out on the 1925 light-land pasture. The plot was divided into 14 sub-plots, and one sub-plot was mown per day. The whole plot, therefore, was cut over once per fortnight during the season. The results in respect of yield, composition and nutritive value were compared with corresponding results obtained on the same pasture plot under a system of weekly cuts during 1925.A second trial was carried out on sub-plots 2 and 3 of the 1926 heavy-land pasture, one sub-plot being cut weekly and the other fort-nightly. The work in this case was restricted to securing comparative data in respect of yield and composition of herbage.The results from both trials lead to the conclusion that the differences in chemical composition, both organic and inorganic, between pasture grass cut at weekly and fortnightly intervals are inconsiderable. The dry matter of the fortnightly-cut grass is extremely rich in crude protein and contains, in comparison with grass cut at the hay stage of maturity, a low percentage of crude fibre. Moreover, these characteristics are retained, by systematic cutting at fortnightly intervals, over the entire season.The results of the digestion trials justify the conclusion that the dry matter of the pasture herbage grown under a system of fortnightly cutting is a protein concentrate equal in digestibility and nutritive value to that obtained by weekly cutting. There is no significant running off in respect of composition and feeding value during the second week of growth. At the end of a fortnight the herbage still consists of the same immature, non-lignified. tissue as it was at the end of a week's growth.

Nutritive value of pasture: IV. The influence of the intensity of grazing on the yield, composition and nutritive value of pasture herbage (Part II)

1929 ◽  
Vol 19 (2) ◽  
pp. 236-265 ◽  
Author(s):  
H. E. Woodman ◽  
D. B. Norman ◽  
J. W. Bee
Keyword(s):  
Chemical Composition ◽  
Present Experiment ◽  
Crude Protein ◽  
Nutritive Value ◽  
The Other ◽  
Ether Extract ◽  
Crude Fibre ◽  
Pasture Grass ◽  
Stages Of Growth ◽  
Other Hand

The object of this series of investigations is to secure detailed information concerning the composition, digestibility and nutritive value of pasture grass in its different stages of growth. The results which were obtained in these respects by cutting the herbage of the experimental pasture plot at weekly and at fortnightly intervals have been described in previous communications. During the season of the present experiment, the trials have been carried a stage further by the adoption of a system of cutting at 3-weekly intervals. The main findings of the 1928 investigation are recorded below:(1) Chemical composition of 3-weekly pasture cuts: The adoption of a more lenient system of cutting at 3-weekly intervals led to a slight lowering of the percentage of crude protein in the grass and a slight raising of the percentages of crude fibre and N-free extractives. On the other hand, no corresponding effect was noted in respect of the ether extract, SiO2-free ash, lime and phosphate, the percentages of these constituents being very similar in the weekly and 3-weekly pasture samples obtained in 1928. The falling off of the percentage of crude protein in the 1928 3-weekly-mown herbage, as compared with the weekly and fortnightly-mown herbage of 1925 and 1927 respectively, was not wholly the consequence of the more lenient system of cutting, but was also due in part to the protein-depressing influence of the droughty periods which were experienced in the 1928 season.

PRODUCTIVITY OF PASTURAL HERBS WITH PARTICIPATION OF FESTULOLIUM DEPENDING ON WEATHER CONDITIONS OF VEGETATION PERIODS

2020 ◽  
Author(s):  
Kira Privalova ◽  
Ruslan Karimov
Keyword(s):  
Weather Conditions ◽  
Research Data ◽  
Pasture Grass ◽  
Moisture Supply ◽  
Productivity Indicators ◽  
Heat And Moisture

Based on 13 years of research, data are presented on the productivity of pasture grass stands with the participation of festulolium (cultivar VIK 90) in years with different conditions of heat and moisture supply of vegetation periods. Productivity indicators, depending on weather conditions, changed 1.5 times.

scholarly journals Temporal Variations in Chemical Composition, In Vitro Digestibility, and Metabolizable Energy of Plant Species Browsed by Goats in Southern Mediterranean Forest Rangeland

Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1441
Author(s):  
Youssef Chebli ◽  
Samira El Otmani ◽  
Mouad Chentouf ◽  
Jean-Luc Hornick ◽  
Jean-François Cabaraux
Keyword(s):  
Chemical Composition ◽  
Plant Species ◽  
Nutritive Value ◽  
Condensed Tannin ◽  
Metabolizable Energy ◽  
Mediterranean Forest ◽  
In Vitro Digestibility ◽  
Large Variability ◽  
Southern Mediterranean

Forest rangelands contribute largely to goat diets in the Mediterranean area. Information about browsed plant quality is essential for adequate feeding management. The purpose of this study was to evaluate the temporal changes in chemical composition and in vitro digestibility of the main plant species selected by goats in the Southern Mediterranean forest rangeland during two consecutive years; these were very contrasted (dry and wet). The browsed species were composed of herbaceous, eleven shrubs, and four tree species. Overall, large variability in chemical composition, in vitro organic matter digestibility (IVOMD), and metabolizable energy (ME) was observed among species, grazing season (spring, summer, and autumn), and years within each species. Crude protein (CP) content varied from 60 to 240 g/kg dry matter (DM). The fiber fractions, except for Quercus suber, increased significantly by advancing maturity. Due to the water stress, the lignin level presented a higher value during the spring of the dry year. Condensed tannin (CT) content varied from 2 to 184 g/kg DM. CP, IVOMD, and ME showed a negative correlation with lignin and CT. Based on the results presented herein, it is concluded that the nutritive value of the browsed plant species was highest in the spring and lowest during the summer and autumn of both studied years. With a good grazing management strategy, the selected plant species by goats could guarantee high-quality feeding resources throughout the year.

Chemical composition and nutritive value of mature annual legumes for sheep

1992 ◽  
Vol 37 (3-4) ◽  
pp. 221-231 ◽  
Author(s):  
X. Li ◽  
R.C. Kellaway ◽  
R.L. Ison ◽  
G. Annison
Keyword(s):  
Chemical Composition ◽  
Nutritive Value ◽  
Annual Legumes

Nutritive value of corn, barley, wheat and oats fed with medium quality hay to fattening steers

1992 ◽  
Vol 72 (2) ◽  
pp. 367-373 ◽  
Author(s):  
S. Dion ◽  
J. R. Seoane
Keyword(s):  
Dry Matter ◽  
Nutritive Value ◽  
Average Daily Gain ◽  
Feed Ratio ◽  
Acid Detergent Fiber ◽  
Finishing Diets ◽  
Fiber Digestibility ◽  
Grass Hay ◽  
Medium Quality ◽  
Daily Gain

Thirty-two large-frame crossbred steers (443 ± 5 kg) were used to determine the nutritive value of cracked corn, rolled barley, rolled oats and rolled wheat in finishing diets for beef cattle fed medium-quality grass hay. Diets contained about 54% grains, 40% grass hay and 6% of a supplement of minerals, vitamins and lasalocid. Total daily dry matter (DM) intake ranged from 9.52 to 10.24 kg, average daily gain from 1.09 to 1.17 kg and gain to feed ratio from 0.113 to 0.121, but these values were not statistically different (P > 0.05). Apparent digestibilities of DM and energy of steers receiving the oats diet were lower than those of steers receiving the wheat diet (P < 0.05), the other diets having intermediate values. Apparent digestion coefficient of protein was higher for the oats diet (P < 0.05) than for other diets. Acid detergent fiber digestibility was higher (P < 0.05) and starch digestibility was lower (P < 0.05) in steers receiving corn than in those receiving barley, oats or wheat. The results indicate that nutritive value of all diets was similar. Key words: Grains, fattening steers, digestibility

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