scholarly journals Post-peak supplementation of pasture fed dairy cows with sulla and maize silages

2002 ◽  
pp. 125-128
Author(s):  
A.V. Chaves ◽  
S.L. Woodward ◽  
G.C. Waghorn ◽  
I.M. Brookes ◽  
C.W. Holmes ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Nutritive Value ◽  
Maize Silage ◽  
Low Level ◽  
Minimum Requirements ◽  
Cow Performance ◽  
Grazing Dairy Cows ◽  
The Impact ◽  
In Sacco

A trial was carried out at Dexcel in Hamilton to investigate the effects of silage supplementation of grazing dairy cows post-peak lactation. Forage mixtures used in the four week trial were based on previous trial results and information from in vitro and in sacco incubations. Sulla and maize silages were used to supplement pasture and to meet minimum requirements for protein. Five groups of ten cows were grazed on a restricted daily allowance of 18 kg dry matter (DM) pasture/cow to simulate a summer pasture deficit, and four groups received sulla silage (S) or maize silage (M) alone or in mixtures of 25M:15S or 15M:25S to make up 40% of total DM intake. A sixth group was given an unrestricted (38 kg DM/cow/day) pasture allowance. The pasture was of high nutritive value and not typical of usual summer conditions, which limited the effects of supplementation in the trial. The restricted pasture allowance resulted in a low level of substitution (0.29) when the silages were fed and substantially increased feed intakes. Although differences in cow responses to the silage mixtures were minor, liveweight and milk production were improved relative to restricted pasture allowance but not for cows given 38 kg pasture DM/ day. The low level of substitution demonstrated the impact of the restricted pasture allowance on cow performance. In sacco data show highest DM degradation rate (k, h-1) when cows were fed pasture with sulla silage (0.08); diets with a high proportion of maize silage were degraded slowly (P

scholarly journals Using manure as fertilizer for maize could improve sustainability of milk production

2018 ◽  
Vol 16 (1) ◽  
pp. e0601 ◽  
Author(s):  
José D. Jiménez-Calderón ◽  
Adela Martínez-Fernández ◽  
Fernando Prospero-Bernal ◽  
José Velarde-Guillén ◽  
Carlos M. Arriaga-Jordán ◽  
...  
Keyword(s):  
Nutritive Value ◽  
Greenhouse Gas Emission ◽  
N2o Emissions ◽  
Dairy Production ◽  
Maize Silage ◽  
Organic Fertilization ◽  
Positive Balance ◽  
Chemical Fertilization ◽  
Cow Performance ◽  
Ch4 And N2o

This study evaluated the effect of organic or chemical fertilization of maize on cow performance, economic outcomes, and greenhouse gas emission. Each type of maize silage according its different fertilization was used in two rations offered to two different groups of nine Friesian-Holstein cows throughout 4 months. The production cost of the maize silage was 8.8% lower for organic than for chemical fertilization. Both silages had similar nutritive value, except a higher concentration of starch in maize with organic fertilization, which allowed a reduction in the proportion of concentrate in the ration, saving 25.3 eurocents per cow in the daily ration, generating a positive balance of 21.8 eurocents per cow and day. The milk yield and composition were unaffected depending on the type of fertilization, whereas the estimation of CH4 and N2O emissions with chemical fertilization was higher than emissions with organic fertilization. As a result, it is possible to increase the sustainability and profitability of dairy production with reuse and recycling of manure.

scholarly journals The Impact of Low-Level Iron Supplements on the Faecal Microbiota of Irritable Bowel Syndrome and Healthy Donors Using In Vitro Batch Cultures

Nutrients ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3819
Author(s):  
Carlos Poveda ◽  
Dora I. A. Pereira ◽  
Marie C. Lewis ◽  
Gemma E. Walton
Keyword(s):  
Irritable Bowel Syndrome ◽  
Gut Microbiota ◽  
Iron Supplementation ◽  
Ferrous Sulphate ◽  
Fluorescence In Situ Hybridisation ◽  
Batch Cultures ◽  
Low Level ◽  
Irritable Bowel ◽  
The Impact

Ferrous iron supplementation has been reported to adversely alter the gut microbiota in infants. To date, the impact of iron on the adult microbiota is limited, particularly at low supplementary concentrations. The aim of this research was to explore the impact of low-level iron supplementation on the gut microbiota of healthy and Irritable Bowel Syndrome (IBS) volunteers. Anaerobic, pH-controlled in vitro batch cultures were inoculated with faeces from healthy or IBS donors along with iron (ferrous sulphate, nanoparticulate iron and pea ferritin (50 μmol−1 iron)). The microbiota were explored by fluorescence in situ hybridisation coupled with flow cytometry. Furthermore, metabolite production was assessed by gas chromatography. IBS volunteers had different starting microbial profiles to healthy controls. The sources of iron did not negatively impact the microbial population, with results of pea ferritin supplementation being similar to nanoparticulate iron, whilst ferrous sulphate led to enhanced Bacteroides spp. The metabolite data suggested no shift to potentially negative proteolysis. The results indicate that low doses of iron from the three sources were not detrimental to the gut microbiota. This is the first time that pea ferritin fermentation has been tested and indicates that low dose supplementation of iron is unlikely to be detrimental to the gut microbiota.

Replacing grazing with a maize silage-based indoor diet for lactating dairy cows in autumn

2001 ◽  
Vol 2001 ◽  
pp. 195-195
Author(s):  
O. Hernandez-Mendo ◽  
J. D. Leaver
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Maize Silage ◽  
Behavioural Responses ◽  
Lactating Dairy Cows ◽  
Soyabean Meal ◽  
Grazing Dairy Cows

Reducing the time available for grazing from 20h to 5h daily, and replacing this with access to a maize silage/soyabean meal diet indoors had no significant effect on milk yield in spring (Hernandez-Mendo and Leaver, 1999). Grazing conditions in autumn present additional problems of shorter daylength and accumulated herbage contamination. The objectives were to examine the production and behavioural responses of grazing dairy cows to reducing access to grazing and increasing access to a maize silage/soyabean meal diet offered indoors.

Effect of timing of protein supplementation on the performance of lactating dairy cows

2005 ◽  
Vol 45 (4) ◽  
pp. 337
Author(s):  
B. C. Granzin
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Fat ◽  
Protein Supplementation ◽  
Net Energy ◽  
Maize Silage ◽  
Holstein Friesian ◽  
Grazing Dairy Cows ◽  
And Control ◽  
Friesian Cows

Two experiments were undertaken to determine the effect of timing of protein supplementation on performance of grazing, lactating Holstein–Friesian cows fed maize silage and grain-based concentrate. In experiment 1, 36 cows were fed 0.8 kg DM/day of solvent-extracted cottonseed meal (CSM) either as 1 meal at 1200 hours with maize silage (CSM 1200) or at 1530 hours with concentrate (CSM 1530), or in 2 meals at 0600 and 1530 hours with concentrate (CSM 600 + 1530). In experiment 2, 36 cows were either fed no CSM (control) or fed 1.0 kg DM/day as either CSM 1200 or CSM 600 + 1530. In experiment 1, daily yields of 4% fat-corrected milk (FCM) and milk fat for CSM 600 + 1530 were significantly higher than for CSM 1530 with respective means of 22.8 v. 20.7 L and 895 v. 804 g. Daily yields of FCM and milk fat for CSM 1200 were intermediate (21.7 L and 841 g/cow, respectively). A similar trend for daily protein yield per cow was noted (712, 695 and 666 g for CSM 600 + 1530, 1200 and 1530, respectively). In experiment 2, milk yield differed numerically between CSM 600 + 1530 and other treatments, with means (± s.e.d.) of 24.7 ± 0.78, 22.9 ± 0.78 and 22.9 ± 0.78 L/cow.day for CSM 600 + 1530, CSM 1200 and control, respectively. Mean (± s.e.d.) net energy requirements for milk production and liveweight change tended to be lower for the control (68 ± 3.6 MJ/cow.day) as opposed to CSM 600 + 1530 (79 ± 3.6 MJ/cow.day) and CSM 1200 (76 ± 3.6 MJ/cow.day). Cumulative time where rumen degradable nitrogen:rumen degradable dry matter was less than 22 g/kg were 2, 2 and 3 h for CSM 600 + 1530, CSM 1200 and CSM 1530, respectively, in experiment 1, and 6, 4 and 2 h for the control, 1200 and CSM 600 + 1530, respectively, in experiment 2. No differences in rumen ammonia-N concentrations were noted between treatments in experiment 1. In experiment 2, a significantly lower mean (± s.e.d.) rumen ammonia-N concentration was recorded for the control at 1530 hours (62 ± 14.1 mg/dL) in comparison to CSM 600 + 1530 (114 ± 14.1 mg/dL) and CSM 1200 (119 ± 14.1 mg/dL). These experiments show that for grazing dairy cows supplemented with maize silage and grain-based concentrate, feeding a daily aliquot of CSM as 2 meals at 0600 and 1530 hours rather than 1 meal at 1200 or 1530 hours improves milk production.

An investigation of the effect of initial milk yield level on the response to sward height and concentrate supplementation in grazing dairy cows

1995 ◽  
Vol 1995 ◽  
pp. 156-156
Author(s):  
R. Pulido ◽  
J.D. Leaver
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Yield Potential ◽  
Concentrate Supplementation ◽  
Yield Level ◽  
Sward Height ◽  
Herbage Intake ◽  
Holstein Friesian ◽  
Cow Performance ◽  
Grazing Dairy Cows

The increase of milk yield potential of dairy cows raises a number of questions relating to their management at pasture where the intake potential might be limiting. The interaction of initial milk yield (IMY), sward availability (SH) and level of concentrate supplementation (CI) is largely unknown.Two experiments of 42 and 24 days in spring and midsummer were carried out with 45 and 27 Holstein Friesian cows respectively. In spring, five IMY groups (range 16.9 to 35.5 kg/day) and in midsummer three IMY groups (range 22.2 to 31.8 kg/day) were used. In both periods, three compressed sward height(3 to 5, 5 to 7 and 7 to 9 cm) and three CI (0, 3 and 6 kg/day, with 160 g CP/kg DM, 12.8 MJ ME/kg DM) were used. The grazing area consisted of 7.9 ha of perennial ryegrass which was set stocked. The herbage intake (HDMI) was estimated indirectly from individual cow performance. Grazing time (GT) was recorded for each cow on 24 hour observations. Multiple regression analyses were carried out relating the dependent variables herbage intake, grazing behaviour and milk production to the independent variables (IMY, SH, CI).

The rumen degradability of crimped wheat in comparison with conventionally treated grain assessed in vitro

2002 ◽  
Vol 2002 ◽  
pp. 168-168
Author(s):  
F.L. Mould ◽  
K. Cave
Keyword(s):  
Dairy Cows ◽  
Research Data ◽  
Starch Granules ◽  
Wheat Grain ◽  
Fine Particulate ◽  
Cereal Grain ◽  
Published Research ◽  
Main Attraction ◽  
In Sacco

Despite little published research data (Ekström et al., 1966) the use of crimped cereal grain in the rations of high producing dairy cows has gained considerable acceptance. This is partly due to an earlier harvesting date permitting replanting up to three weeks earlier and to reduced storage costs. However, the main attraction is that high levels of crimped grain are readily consumed without apparently adversely affecting rumen fermentation. Although this appears to be in direct contradiction with the belief that crimped grain is fermented faster due the ensiling process, this information was probably obtained using the in sacco technique which tends to over-estimate processed cereal degradation due of fine particulate losses (e.g. starch granules). This study was therefore undertaken to characterise the degradation profile of crimped wheat grain relative to that of conventionally harvested material.

Nutritive value for lactating dairy cows of the pressed herbage remaining after the partial extraction of leaf juice

1981 ◽  
Vol 21 (111) ◽  
pp. 376 ◽  
Author(s):  
CR Stockdale ◽  
KR King ◽  
DR McKenzie
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Nutritive Value ◽  
Protein Extraction ◽  
Significant Loss ◽  
In Vitro Digestibility ◽  
Lactating Dairy Cows ◽  
Partial Extraction

A series of six experiments compared the production of lactating dairy cows eating either fresh herbage or the pressed herbage remaining after the partial extraction of juice. Irrigated perennial pasture and irrigated lucerne (Medicago sativa) were used in different experiments. With forage-harvested pasture, extraction removed an average of 42.1 g of protein per kg dry matter (DM) of pasture processed. An average of 85% of the DM of the original fresh pasture was left as pressed pasture. The process lowered the in vitro digestibility, total nitrogen, and cell contents of the herbage, and raised the cell wall constituents. It also reduced herbage phosphorus, potassium, magnesium and sodium, but increased herbage calcium slightly. The milk yield of cows fed an equivalent DM intake of pressed residue was, on average, 6% lower than the milk yield of cows fed fresh pasture. The responses shown by the milk constituents were inconsistent. With lucerne, extraction removed an average of 95.9 g of protein from each kg of fresh herbage and an average of 74% of the lucerne was left as pressed lucerne. This reduced the quality of the pressed residue as determined by in vitro digestibility (5%), Kjeldahl nitrogen (19%) and neutral detergent fibre (27%). However, there was no significant loss of production for cows on the pressed herbage, although there were small differences. It is concluded that lucerne would appear to have the greater potential for a leaf protein extraction industry in the irrigated areas of the Goulburn Valley of Victoria.

Effect of fungal treatment on the chemical composition, in vitro digestibility and in sacco degradability of wheat straw

2003 ◽  
Vol 2003 ◽  
pp. 166-166
Author(s):  
H. Fazaeli ◽  
A. Azizi ◽  
Z. A. M. Jelan ◽  
S. A. Mirhadi
Keyword(s):  
Chemical Composition ◽  
Wheat Straw ◽  
Nutritive Value ◽  
White Rot Fungi ◽  
White Rot ◽  
In Vitro Digestibility ◽  
Fungal Treatment ◽  
In Sacco Degradability ◽  
In Sacco

Fungal treatment has been recently considered as a promising method for improving the nutritive value of straw (Zadrazil et al., 1997). Several studies have been conducted to identify species of white-rot fungi for assessing their ability to improve the nutritive value of straw (Yamakamwa et al., 1992). Since there are many species of fungi in nature, there is an interest in characterising of some species. The objectives of this experiment were to study the effect of five Pleurotus fungi on the chemical composition, in vitro digestibility and in sacco degradability of wheat straw and evaluate their effect in upgrading the nutritive value of lignicellulosic materials.

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