The growth of phosphorus kinetics of steers grazing a subtropical pasture

1994 ◽  
Vol 45 (8) ◽  
pp. 1831 ◽  
Author(s):  
RW McLean ◽  
JH Ternouth
Keyword(s):  
Dry Matter ◽  
Cattle Grazing ◽  
Dry Matter Intake ◽  
P Fertilization ◽  
Nutrient Balances ◽  
Cenchrus Ciliaris ◽  
Tropical Pastures ◽  
P Values ◽  
Different Seasons ◽  
Kinetics Of

The growth and nutrient balances of steers grazing predominantly buffel (Cenchrus ciliaris) grass pastures fertilized with phosphorus (P) at annual rates of 0, 2.5, 5 and 15 kg P ha-1 were studied in three different seasons. There were two additional treatments in which steers grazing the 0 and 2.5 kg P ha-1 treatments were supplied daily with phosphorus supplement at 5 g head-1 throughout the study. Liveweight gain was increased by P fertilization but not P supplementation. Over a period of 15 months, the steers grazing the 15 kg P ha-1 pastures gained 80 kg more than those on the unfertilized pastures. This was associated with a small increase in dry matter intake and larger increases in P and nitrogen (N) intakes. Generally, the apparent absorptions of N, P and calcium by the steers were positive. In each season, the P intake, dietary faecal P and endogenous faecal P were all higher in cattle grazing fertilized pastures. After making allowance for an underestimation of pasture intake, our estimates of P intake were considerably less than published requirements to sustain the liveweight gains recorded. Endogenous faecal P values (13-19 mg kg-1 liveweight) were lower and the efficiency of absorption (mean 76%) was significantly higher so that the P requirements of cattle grazing tropical pastures appear to be much lower than recently published values.

Prediction of dry matter intake by meat sheep on tropical pastures

2021 ◽  
Vol 53 (5) ◽  
Author(s):  
Antonio Leandro Chaves Gurgel ◽  
Gelson dos Santos Difante ◽  
João Virgínio Emerenciano Neto ◽  
Juliana Caroline Santos Santana ◽  
Patrick Bezerra Fernandes ◽  
...  
Keyword(s):  
Dry Matter ◽  
Dry Matter Intake ◽  
Tropical Pastures ◽  
Meat Sheep

Neutral detergent fiber concentration of corn silage and rumen inert bulk influences dry matter intake and ruminal digesta kinetics of growing steers2

2002 ◽  
Vol 80 (3) ◽  
pp. 833-840 ◽  
Author(s):  
K. E. Tjardes ◽  
D. D. Buskirk ◽  
M. S. Allen ◽  
N. K. Ames ◽  
L. D. Bourquin ◽  
...  
Keyword(s):  
Dry Matter ◽  
Corn Silage ◽  
Neutral Detergent Fiber ◽  
Dry Matter Intake ◽  
Fiber Concentration ◽  
Kinetics Of

The effect of complementary supplements on grass silage intake

1993 ◽  
Vol 1993 ◽  
pp. 139-139
Author(s):  
G. Moseley
Keyword(s):  
Dry Matter ◽  
Nutrient Utilization ◽  
Dry Matter Intake ◽  
Nutrient Balances ◽  
Grass Silage

Grass silage provides more than 80% of winter forage for livestock but, despite significant advances in ensilage methods, there remain significant problems of low intake, poor nutrient utilization and high effluent losses. The use of complementary concentrate supplements formulated to match silage composition, and the addition of absorbent feed compounds to grass during ensilage were examined as a means of addressing these problems.Two contrasting silages were made from the same grass crop, either by applying Add Safe (3.51/T) or by adding an absorbent silage enhancing feed compound (kg/T) during ensilage. These were fed to groups of wether sheep either alone or with a complementary supplement and dry matter intake, digestibility and nutrient balances were estimated.

scholarly journals Body weight components of Nellore steers finished in tropical pastures

2018 ◽  
Vol 41 (1) ◽  
pp. 39005
Author(s):  
Vitor Visitin Silva de Almeida ◽  
Aline Cardoso Oliveira ◽  
Hellenn Cardoso Oliveira ◽  
Robério Rodrigues Silva ◽  
Dorgival Morais de Lima Júnior
Keyword(s):  
Body Weight ◽  
Dry Matter ◽  
The Body ◽  
Dry Matter Intake ◽  
Protein Supplement ◽  
Initial Body Weight ◽  
Tropical Pastures ◽  
Nellore Cattle ◽  
Urochloa Brizantha ◽  
Experimental Group

 The aim of this study was to evaluate the effect of increasing levels of supplementation on body weight components of Nellore cattle grazing in Urochloa brizantha. Twenty-four steers with initial body weight (BW) of 371 ± 14 kg and average age of 26 months were used. Four animals were slaughtered at the beginning of the experiment as a reference and the others were distributed in 4 treatments [0.0% (mineral salt), 0.3%, 0.6% and 0.9% supplement BW]. The slaughter of the experimental group was performed when the animals reached 450 kg and the body weight components were weighed. Data were submitted to analysis of variance and regression. The increase in supplementation level reduced (p < 0.05) pasture dry matter intake, but did not influence (p > 0.05) on empty body weight (EBW) (380.3 kg) and cold carcass weight (CCW) (247.5 kg). The weights of skin, liver, rumen and fat were not influenced (p > 0.05) by supplementation level. The animals gained, on average, 75.3 kg EBW and 50.7 kg CCW, but the treatments did not influence (p > 0.05) the gains of body weight components. The increasing of energetic-protein supplement level for Nellore steers in Urochloa brizantha pasture does not affect carcass and non-carcass components. 

scholarly journals Supplementation level increasing dry matter intake of beef cattle grazing low herbage height

2020 ◽  
Vol 48 (1) ◽  
pp. 28-33
Author(s):  
Rondineli Pavezzi Barbero ◽  
Euclides Braga Malheiros ◽  
Natalia María Aguilar ◽  
Elieder Prates Romanzini ◽  
Adriana Cristina Ferrari ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Cattle Grazing ◽  
Dry Matter Intake

Determination of Pasture Dry Matter Intake Rates in Different Seasons and Their Application in Grazing Management

2012 ◽  
Vol 32 (2) ◽  
pp. 85-92 ◽  
Author(s):  
Lauren E. Dowler ◽  
Paul D. Siciliano ◽  
Shannon E. Pratt-Phillips ◽  
Matthew Poore
Keyword(s):  
Dry Matter ◽  
Grazing Management ◽  
Dry Matter Intake ◽  
Different Seasons

scholarly journals Acceptability Trials On Buffel Grass (Cenchrus ciliaris) and Guinea Grass Hybrid (Pannicum maxinium), as Compared with Napier (Merker) Grass (Pennisetum purpureum)

1969 ◽  
Vol 52 (2) ◽  
pp. 77-84
Author(s):  
L. Rivera Brenes ◽  
J. A. Arroyo ◽  
A. Acosta Matienzo
Keyword(s):  
Dry Matter ◽  
Live Weight ◽  
Pennisetum Purpureum ◽  
Dry Matter Intake ◽  
Dry Matter Content ◽  
Cenchrus Ciliaris ◽  
Total Consumption ◽  
Buffel Grass ◽  
Fresh Material ◽  
Guinea Grass

An acceptability test was conducted for Buffel grass (Cenchrus ciliaris). and Guinea grass hybrid (Pannicum maximum). Napier grass (Pennisetum purpureum) was used as the standard for comparison. A 3 X 3 latin-square design was followed. The experiment was made during the more or less recognized growing seasons in the Island, and the ages tested were 49 to 55, 63 to 69, 77 to 83, 83 to 89, 97 to 103, and 111 to 117 days. Total consumption of chopped green material and dry-matter intake per cow, per day, per 100 pounds of live weight, were used as criteria for comparison. All three grasses were equally accepted on the basis of dry-matter intake per 100 pounds of live weight. Other important observations for 1. Cows consumed more fresh material from grass of lower dry-matter content, giving an erroneous impression of better acceptability. 2. The dry-matter intake per 100 pounds of live weight increased significantly as the percentage of dry matter in the grasses increased up to about 89 days old. From the results of this study it appears that cows consume less fresh material from a grass containing more dry matter, on a percentage basis. More information is needed to reach definite conclusions on this point.

A study of the ‘dissolved faeces fraction’ method for the indirect estimation of herbage intake

1964 ◽  
Vol 63 (3) ◽  
pp. 305-310 ◽  
Author(s):  
J. P. Langlands ◽  
J. L. Corbett
Keyword(s):  
Dry Matter ◽  
Similar Type ◽  
Dry Matter Intake ◽  
Indirect Estimation ◽  
Herbage Intake ◽  
Different Seasons ◽  
The Mean ◽  
Logarithmic Relationship ◽  
Fraction Method

1. Samples of faeces obtained from eleven continuous digestibility trials in which sheep, steers or cows were given fresh herbages grown in different seasons in 2 years were analysed for the ‘dissolved faeces fraction’ (D.I-.F.).2. Dry-matter intake by sheep was linearly related to the weight of D.F.F. excreted and the equation predicted intakes that were 20 %higher at the mean intake than those estimated from a similar type of relationship obtained by Owen (1961). A logarithmic relationship was derived when the observations for all species were combined.

Seasonal nutrient intake and phosphorus kinetics of grazing steers in northern Australia

1994 ◽  
Vol 45 (8) ◽  
pp. 1817 ◽  
Author(s):  
RE Hendricksen ◽  
JH Ternouth ◽  
LD Punter
Keyword(s):  
Nutrient Intake ◽  
Dry Matter ◽  
Dry Season ◽  
Dry Matter Intake ◽  
Northern Australia ◽  
Native Grass ◽  
Grazed Pastures ◽  
P Fertilizer ◽  
Grass Growth ◽  
Kinetics Of

The growth of Bos indicus cross-steers grazing native grass and native grass-legume (Stylosanthes scabra cv. Seca) pastures was monitored for 392 days in five unreplicated experimental paddocks, each grazed by three steers. Two phosphorus (P) fertilizer rates: F1, 4-5 kgP/ha every 2 years and F2, 9.0 kgP/ha annually, together with an unfertilized control, FO, were studied. P supplement was supplied to cattle in two additional paddocks (FOS and F1S) at the rate of 5 gP/ha/day-l. In the dry, wet and late wet seasons, pasture yield and pasture component yield were measured. At the same time, the nutrient intake and P kinetics of resident steers were measured using chromic oxide capsules and intravenous injections of 32P . Additional non-resident steers, fistulated at the oesophagus, grazed the pastures intermittently to provide estimates of dry matter digestibility, fibre, nitrogen (N) and P content of the selected diet. Phosphorus fertilizer increased legume and native grass growth which resulted in more dry matter containing higher concentrations of P and N than unfertilized pastures. Both P fertilizer and supplement increased dry matter intake and liveweight gain of cattle. During the experimental period of 13 months, steers which grazed pastures that received the (F2) fertilizer treatment gained on average 0.43 kg/day compared with 0.19 kg/day for those which grazed unfertilized FO pastures. Supplementation increased wet season liveweight gain from 0.45 to 0.59 kg/day and 0.46 to 0.73 kg/day for FO and F1 treatments respectively. Only cattle which grazed pastures that received the F1S and F2 treatments gained weight in the dry season. Nitrogen was the primary nutrient limiting cattle growth from unfertilized pastures in the dry season, but when pastures were fertilized (4.5 kgP/ha every 2 years) and legumes established, P was the primary limiting nutrient. Intakes of P ranged from 7 to 35 mg/kg LW and were lower than those recommended by recognized authorities for the steer growth rates we recorded. Both the absorption and faecal excretion of dietary P were closely related to P intake. Endogenous faecal P values varied with P intake in the range 9-22 mg/kg liveweight. Endogenous faecal P was also related to dry matter intake and plasma inorganic P. The coefficient of P absorption was lowest (0.65) for steers grazing unfertilized native pasture (FO), but increased with P intake to 0.85 for steers grazing the F1S treatment. We conclude that the P requirements of growing cattle grazing native grass and native grass-legume pastures in northern Australia are about half those recommended by most authorities.

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