Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Records 1 - 20 / 40

  • help
  • print

    Print search results

  • export

    Export search results

  • alert
    We will mail you new results for this query: metisnummer==1043530
Check title to add to marked list
In vitro gas and methane production of silages from whole-plant corn harvested at 4 different stages of maturity and a comparison with in vivo methane production
Macome, Felicidade ; Pellikaan, W.F. ; Hendriks, W.H. ; Dijkstra, J. ; Hatew, Bayissa ; Schonewille, J.T. ; Cone, J.W. - \ 2017
Journal of Dairy Science 100 (2017)11. - ISSN 0022-0302 - p. 8895 - 8905.
methane - corn silages - Maturity - in vitro - In vivo
The current study investigated the relationship between in vitro and in vivo CH4 production by cows fed corn silage (CS)-based rations. In vivo CH4 production was measured in climate respiration chambers using 8 rumen-cannulated Holstein-Friesian cows. In vitro CH4 production was measured using rumen fluid from the 8 cows that were fully adapted to their respective experimental rations. The animals were grouped in 2 blocks, and randomly assigned to 1 of the 4 total mixed rations (TMR) that consisted of 75% experimental CS, 20% concentrate, and 5% wheat straw [dry matter (DM) basis]. The experimental CS were prepared from whole-plant corn that was harvested at either a very early (25% DM), early (28% DM), medium (32% DM), or late (40% DM) stage of maturity. The 4 experimental TMR and the corresponding CS served as substrate in 2 separate in vitro runs (each run representing 1 block of 4 animals) using rumen fluid from cows fed the TMR in question. No relationship was found between in vivo CH4 production and in vitro CH4 production measured at various time points between 2 and 48 h. None of the in vitro gas production (GP) and CH4 production parameters was influenced by an interaction between substrate and origin of rumen fluid. In vitro measured 48-h GP was not affected by the maturity of whole-plant corn, irrespective whether CS alone or as part of TMR was incubated in adapted rumen inoculum. Incubation of the experimental TMR did not affect the kinetics parameters associated with gas or CH4 production, but when CS alone was incubated the asymptote of GP of the soluble fraction was slightly decreased with increasing maturity of CS at harvest. In vitro CH4 production expressed as a percent of total gas was not affected by the maturity of whole-plant corn at harvest. Several in vitro parameters were significantly affected (GP) or tended to be affected (CH4) by diet fed to donor cows. It was concluded that the current in vitro technique is not suitable to predict in vivo CH4 production from CS-based rations.
Effect of supplemental concentrate during the dry period or early lactation on rumen epithelium gene and protein expression in dairy cattle during the transition period
Dieho, K. ; Baal, J. van; Kruijt, L. ; Bannink, A. ; Schonewille, J.T. ; Carreño, D. ; Hendriks, W.H. ; Dijkstra, J. - \ 2017
Journal of Dairy Science 100 (2017)9. - ISSN 0022-0302 - p. 7227 - 7245.
Gene and protein expression - Rumen adaptation - Rumen epithelium - VFA absorption and metabolism
We previously reported 2 experiments with rumen-cannulated Holstein-Friesian dairy cows showing that during the transition period, rumen papillae surface area, and fractional absorption rate of volatile fatty acids (VFA) increase after calving. However, supplemental concentrate during the dry period and rate of increase of concentrate allowance during lactation affected papillae surface area, but not VFA absorption. Here we report the changes in gene and protein expression in rumen papillae related to tissue growth and VFA utilization. The lactation experiment treatment consisted of a rapid [RAP; 1.0 kg of dry matter (DM)/d; n = 6] or gradual (GRAD; 0.25 kg of DM/d; n = 6) increase of concentrate allowance (up to 10.9 kg of DM/d), starting at 4 d postpartum (pp). The dry period experiment treatment consisted of 3.0 kg of DM/d of concentrate (n = 4) or no concentrate (n = 5) during the last 28 d of the dry period. Real-time quantitative PCR analysis of rumen papillae showed that the expression of apoptosis-related genes was neither affected by day nor its interaction with treatment for both experiments. Expression of epithelial transporter genes was not affected by day or treatment in the lactation experiment, except for NBC1. In the dry period experiment, expression of MCT1, NBC1, DRA, NHE2, NHE3, and UT-B generally decreased after calving. A day and treatment interaction was observed for ATP1A1 in the dry period experiment, with greater expression at 18 and 8 d antepartum for concentrate than no concentrate. Generally, expression of VFA metabolism-related genes was not affected by day or its interaction with treatment. In the lactation experiment, immunoblotting of 5 selected genes showed that protein expression of DRA and PCCA was greater at 16 d pp compared with 3 and 44 d pp. Expression of NHE2 was greater, and that of ATP1A1 lower, at 16 and 44 d pp compared with 3 d pp, suggesting alterations in intracellular pH regulation and sodium homeostasis. Both MCT1 and PCCA protein were upregulated by RAP from 3 to 16 d pp, indicating modulations in VFA metabolism. Our data suggests that VFA absorption and metabolic capacity changed little per unit of surface area during the transition period, and suggests that a change in mitosis rate rather than apoptosis rate is associated with the increased ruminal VFA production, resulting in tissue growth. A significant but weak correlation between the examined gene and protein expression levels was observed only for PCCA, indicating that care must be taken when interpreting results obtained at either level.
In vitro rumen gas and methane production of grass silages differing in plant maturity and nitrogen fertilisation, compared to in vivo enteric methane production
Macome, Felicidade ; Pellikaan, W.F. ; Schonewille, J.T. ; Bannink, A. ; Laar, H. van; Hendriks, W.H. ; Warner, D. ; Cone, J.W. - \ 2017
Animal Feed Science and Technology 230 (2017). - ISSN 0377-8401 - p. 96 - 102.
Grass silage - In vitro - In vivo - Methane - Dairy cow
The potential of an in vitro gas production (GP) system to predict the in vivo enteric methane (CH4) production for various ryegrass-based silages was evaluated, using adapted rumen fluid from cows. Rumen fluid from 12 lactating rumen-cannulated Holstein-Friesian cows were used for in vitro incubations and compared with in vivo CH4 production data derived from the same cows fed the same grass silages. The cows consumed a total mixed ration consisting of six different grass silages and concentrate at an 80:20 ratio on a dry matter (DM) basis. The grass silages differed in plant maturity at harvest (28, 41 and 62 days of regrowth) and N fertilisation (65 and 150 kg of N/ha). Rumen fluid from cows consuming each of the six grass silages was used to determine the in vitro organic matter (OM) fermentation and in vitro CH4 synthesis, using an automated GP technique. In vitro GP decreased with increasing maturity of the grass. In vitro CH4 production, expressed either in ml/g of OM, in ml/g of degraded OM (DOM) or as a% of the total GP, increased with increased N fertilisation (P < 0.05). Maturity of grass at harvest did not affect the CH4 synthesis expressed in ml/g of DOM and CH4 expressed as% of the total gas, whereas N fertilisation increased the in vitro CH4 synthesis, expressed in any unit. The in vitro data correlated poorly with the in vivo data. Across the six grass silages tested, the in vitro CH4 production, expressed in ml/g of OM after 8, 12, 24, and 72 h of incubation did not correlate with the in vivo enteric CH4 production, expressed in g/kg of DM intake (R2 = 0.01–0.08). Stepwise multiple regression showed a weak, but positive correlation between the observed in vivo CH4 synthesis, expressed in g/kg FPCM and the predicted CH4 per kg FPCM, using the amount of in vitro organic matter degraded (R2 = 0.40; P = 0.036). In vitro gas and CH4 parameters did not improve the accuracy of the prediction of the in vivo CH4 data.
PRELIMINARY RESULTS. Feeding supplemental concentrate during the dry-period: : can we prepare the rumen for the lactation ration?
Dieho, K. ; Dijkstra, J. ; Schonewille, J.T. ; Bannink, A. - \ 2016
Relationship between in-vitro and in-vivo methane production measured from donor cows fed maize silage, harvested at different stages of maturity
Macome, Felicidade ; Dijkstra, J. ; Hendriks, W.H. ; Cone, J.W. ; Pellikaan, W.F. ; Schonewille, J.T. - \ 2016
Exposure to a novel feedstuff by goat dams during pregnancy and lactation versus pregnancy alone does not further improve post-weaning acceptance of this feedstuff by their kids
Hai, P.V. ; Schonewille, J.T. ; Tien, D.V. ; Everts, H. ; Hendriks, W.H. - \ 2016
Journal of the Science of Food and Agriculture 96 (2016)6. - ISSN 0022-5142 - p. 2215 - 2219.
BACKGROUND
Previous experiments demonstrated the existence of in utero learning in goats. However, in contrast to other animal species, in goats there is no information about the potential of flavour transmission from maternal feed to goat kids during lactation. The aim of the current study was to assess the role of post-natal exposure of Chromonaela odorata leaf meal (COLM) in relation to the preferences to this feedstuff by goat kids after weaning. It was hypothesised that exposure of COLM to the dams during both pregnancy and lactation versus pregnancy alone, additionally affects post-weaning intake of COLM by their offspring.
RESULTS
Consumption of COLM by the goat kids was similar during the first week post-weaning for all treatments. However, after 4 weeks the intake of COLM was at least 1.8 times greater when kids were exposed to COLM during pregnancy whereas it remained virtually unchanged when kids were exposed to COLM during lactation only. The increase in COLM consumption was in line with the observations on latency to eat and meal size.
CONCLUSION
Transmission of feeding behaviour from goat dams to offspring does not occur during lactation. However, the concept of in utero learning in goats was confirmed. © 2015 Society of Chemical Industry
Nutritive value for ruminants of white-rot fungal treated wheat straw
Ratni, E. ; Schonewille, J.T. ; Sonnenberg, A.S.M. ; Hendriks, W.H. ; Cone, J.W. - \ 2016
In vitro fermentation and methane production of maize silages harvested at different maturities in rumen fluid, adapted to the maize silages or not
Macome, Felicidade ; Cone, J.W. ; Pellikaan, W.F. ; Schonewille, J.T. ; Chuko, B.H. ; Hendriks, W.H. - \ 2016
Changes in ruminal volatile fatty acid production and absorption rate during the dry period and early lactation as affected by rate of increase of concentrate allowance
Dieho, K. ; Dijkstra, Jan ; Schonewille, J.T. ; Bannink, A. - \ 2016
Journal of Dairy Science 99 (2016)7. - ISSN 0022-0302 - p. 5370 - 5384.
Rumen adaptation - Rumen papillae - Transition dairy cow - Volatile fatty acid absorption - Volatile fatty acid production

The aim of the present experiment was to study changes in volatile fatty acid (VFA) production using an isotope dilution technique, and changes in VFA fractional absorption rate (k aVFA) using a buffer incubation technique (BIT) during the dry period and early lactation, as affected by the postpartum (pp) rate of increase of concentrate allowance. The current results are complementary to previously reported changes on rumen papillae morphology from the same experiment. From 50 d antepartum to 80 d pp, VFA production rate was measured 5 times and k aVFA was measured 10 times in 12 rumen-cannulated Holstein Friesian cows. Cows had free access to a mixed ration, consisting of grass and corn silage, soybean meal, and (dry period only) chopped straw. Treatment consisted of either a rapid (RAP; 1.0 kg of DM/d; n = 6) or gradual (GRAD; 0.25 kg of DM/d; n = 6) increase of concentrate allowance (up to 10.9 kg of DM/d), starting at 4 d pp, aimed at creating a contrast in rumen-fermentable organic matter intake. For the BIT, rumen contents were evacuated, the rumen washed, and a standardized buffer fluid introduced [120 mM VFA, 60% acetic (Ac), 25% propionic (Pr), and 15% butyric (Bu) acid; pH 5.9 and Co-EDTA as fluid passage marker]. For the isotope dilution technique, a pulse-dose of 13C-labeled Ac, Pr, and Bu and Co-EDTA as fluid passage marker was infused. The rate of total VFA production was similar between treatments and was 2 times higher during the lactation (114 mol/d) than the dry period (53 mol/d). Although papillae surface area at 16, 30, and 44 d pp was greater in RAP than GRAD, Bu and Ac production at these days did not differ between RAP and GRAD, whereas at 16 d pp RAP produced more Pr than GRAD. These results provide little support for the particular proliferative effects of Bu on papillae surface area. Similar to developments in papillae surface area in the dry period and early lactation, the k aVFA (per hour), measured using the BIT, decreased from 0.45 (Ac), 0.53 (Pr) and 0.56 (Bu) at 50 d antepartum to 0.28 (Ac), 0.34 (Pr) and 0.38 (Bu) at 3 d pp. Thereafter, k aVFA (/h) rapidly increased up to 0.67 (Ac), 0.79 (Pr), and 0.79 (Bu) at 80 d pp. Although papillae surface area was greater at 16, 30, and 44 d pp in RAP than GRAD, no differences in k aVFA between RAP and GRAD were observed during these days showing papillae surface area is not the limiting factor for k aVFA during early pp adaptation.

Morphological adaptation of rumen papillae during the dry period and early lactation as affected by rate of increase of concentrate allowance
Dieho, K. ; Bannink, A. ; Geurts, I.A.L. ; Schonewille, J.T. ; Gort, G. ; Dijkstra, J. - \ 2016
Journal of Dairy Science 99 (2016)3. - ISSN 0022-0302 - p. 2339 - 2352.
Knowledge of the morphological adaptation of rumen papilla, which plays an important role in volatile fatty acid absorption, in dry and early lactation dairy cattle is limited. Therefore, macro- and microscopic changes in papilla morphology during the dry period and lactation and the effect of rate of increase of concentrate allowance were studied. Samples were collected from 12 rumen-cannulated Holstein Friesian dairy cows during a pretreatment period, 50, 30, and 10 d antepartum (the dry period) and 3 d postpartum (pp), and a treatment period, 9, 16, 30, 44, 60, and 80 d pp. Cows had free access to either a dry period ration [27% grass silage, 27% corn silage, 35% wheat straw, and 11% soybean meal on a dry matter (DM) basis] or a basal lactation ration (42% grass silage, 41% corn silage, and 17% soybean meal on a DM basis, and 0.9 kg of DM/d concentrate). Treatment consisted of either a rapid (1.0 kg of DM/d; RAP; n = 6) or gradual (0.25 kg of DM/d; GRAD; n = 6) increase of concentrate allowance (up to 10.9 kg of DM/d), starting at d 4 pp, aimed at creating a contrast in rumen-fermentable organic matter (FOM) intake. Papillae were collected from the ventral, ventral blind, and dorsal blind rumen sacs and measured digitally. Intake of DM (11.9 kg/d) and FOM (5.7 kg/d) did not change during the pretreatment period, but increased during the treatment period to 24.5 and 15.0 kg/d at 80 d pp, respectively. Concentrate treatment and sampling day interacted for FOM intake, which was 22% greater in RAP at 16 d pp compared with GRAD. Papilla surface area decreased during the pretreatment period by 19% to 28.0 mm2 at 3 d pp, thereafter increasing to 63.0 mm2 at 80 d pp. Concentrate treatment and sampling day interacted for surface area, which was greater in RAP compared with GRAD at 16 (46.0 vs. 33.2 mm2), 30 (55.4 vs. 41.2 mm2), and 44 (60.5 vs. 49.7 mm2) days pp, showing that papillae can respond to a rapid rate of increase of FOM intake by increasing growth rate. Microscopic morphology was affected by sampling day, but neither by concentrate treatment nor by their interaction, with a decrease in papilla and epithelium thickness during the lactation. In conclusion, the rumen papillae respond to changes in FOM intake and the magnitude of this response depends on the rate of increase of FOM intake. This response in surface area of the rumen papillae potentially facilitates the absorption of the volatile fatty acids.
Effect of grass silages, differing in maturity and nitrogen fertilisation, on in vitro methane production
Macome, Felicidade ; Hendriks, W.H. ; Dijkstra, J. ; Warner, D. ; Pellikaan, W.F. ; Cone, J.W. ; Schonewille, J.T. - \ 2015
Evaluation of methodological aspects of digestibility meaurements in ponies fed different grass hays
Schaafstra, F.J.W.C. ; Doorn, D.A. van; Schonewille, J.T. ; Wartena, F.C. ; Zoon, M. van; Blok, M.C. ; Hendriks, W.H. - \ 2015
Journal of Animal Science 93 (2015)10. - ISSN 0021-8812 - p. 4742 - 4749.
Methodological aspects of digestibility measurements of feedstuffs for equines were studied in four Welsh pony geldings consuming four grass-hay diets in a 4 × 4 Latin square design. Diets contained either a low (L), medium (M), high (H), or very high (VH) ADF content (264, 314, 375, or 396 g·kg-1 DM, respectively). Diets were supplemented with minerals, vitamins, and TiO2 (3.9 g Ti·d-1). Daily feces excreted were collected quantitatively over 10 consecutive days and analyzed for moisture, ash, ADL, AIA, and titanium (Ti). Minimum duration of total fecal collection (TFC) required for an accurate estimation of apparent organic matter digestibility (OMD) of grass hay was assessed. Based on literature and the calculated cumulative OMD assessed over 10 consecutive days of TFC, a minimum duration of at least 5 consecutive days of fecal collection is recommended for accurate estimation of dry matter digestibility (DMD) and OMD in ponies. The 5-d collection should be preceded by a 14-d adaptation period to allow the animals to adapt to the diets and become accustomed to the collection procedures. Mean fecal recovery over 10 d across diets for ADL, AIA, and Ti was 93.1% (SE 1.9), 98.9% (SE 5.5), and 97.1% (SE 1.8), respectively. Evaluation of CV of mean fecal recoveries obtained by ADL, AIA, and Ti showed that variation in fecal Ti (6.8) and ADL excretion (7.0) was relatively low compared to AIA (12.3). In conclusion, the use of internal ADL and externally supplemented Ti are preferred as markers to be used in digestibility trials in equine fed grass-hay diets.
Grass silages, differing in maturity and nitrogen fertilisation, on in vitro gas and methane
Macome, F.M. ; Hendriks, W.H. ; Dijkstra, J. ; Warner, D. ; Pellikaan, W.F. ; Cone, J.W. ; Schonewille, J.T. - \ 2015
In: Proceedings of the 66th Meeting of the European Federation of Animal Science (EAAP). - - p. 147 - 147.
Effect of grass silage maturity and level of intake on in vitro methane and gas production
Macome, F.M. ; Hendriks, W.H. ; Dijkstra, J. ; Warner, D. ; Pellikaan, W.F. ; Cone, J.W. ; Schonewille, J.T. - \ 2015
In: Proceedings of the 66th Meeting of the European Federation of Animal Science (EAAP). - - p. 143 - 143.
Effect of lactation stage and rate of increase of concentrate allowance on rumen adaptation in dairy cows
Dieho, K. ; Bannink, A. ; Schonewille, J.T. ; Dijkstra, J. - \ 2015
Effect of lactation stage and rate of increase of concentrate allowance on rumen adaptation in dairy cows
Dieho, K. ; Bannink, A. ; Schonewille, J.T. ; Dijkstra, J. - \ 2015
In: Book of abstracts of 2015 Joint Annual Meeting of ADSA-ASAS. - - p. 455 - 455.
We studied the effects of lactation stage and postpartum rate of increase of concentrate allowance on daily fermentable organic matter (FOM) intake, rumen papilla surface area, and fractional VFA absorption rate (kaVFA). The concentrate treatment aimed to create a transient difference in daily FOM intake. Twelve rumen-cannulated, Holstein-Friesian cows had free access to either a dry period ration or a basal lactation ration. Starting at 4 DIM, concentrate allowance increased at a high (1.0 kg DM/d; HIGH, n = 6) or a low rate (0.25 kg DM/d; LOW, n = 6) up to a maximum of 10.9 kg DM/d. On sampling days (-50, -30, -10, 3, 9, 16, 30, 44, 60, and 80 DIM), the rumen contents were evacuated and papilla biopsies taken. Thereafter, kaVFA was measured using the empty washed rumen technique with 46 L McDougall buffer (pH 6.0, 39°C), containing 120 mM VFA (60% acetic, 25% propionic, and 15% butyric acid) and a marker (Co-EDTA). From -50 to 3 DIM, FOM intake was 5.7 ± 0.3 kg/d (P = 0.29), papilla surface area decreased from 34.4 to 28.0 ± 2.0 mm2 (P = 0.02) and kaVFA decreased from 0.51 to 0.33 ± 0.03 /h (P <0.01), with no differences between future treatment groups HIGH and LOW (P = 0.33). From 3 to 80 DIM, FOM intake, papilla surface area, and kaVFA increased to 15.0 ± 0.3 kg/d, 63.4 ± 2.0 mm2, and 0.75 ± 0.03 /h respectively (all P <0.01). A treatment by DIM interaction occurred for daily FOM intake (P <0.01), which was greater in group HIGH at 16 DIM (12.3 vs. 10.1 ± 0.3 kg/d, P <0.01), and for papilla surface area (P = 0.01), which was greater in group HIGH from 16 DIM (46.0 vs. 33.2 ± 2.0 mm2, P <0.01) through to 44 DIM (60.5 vs. 49.7 ± 2.0 mm2, P = 0.01). However, a treatment by DIM interaction did not occur for kaVFA (P = 0.28), which was similar for group HIGH and LOW at 16 DIM (0.60 vs. 0.56 ± 0.03 /h, P = 0.53) and 44 DIM (0.69 vs. 0.69 ± 0.03 /h, P = 0.95). In conclusion, lactation stage but not concentrate treatment affected kaVFA. This suggests kaVFA increases with, but is not limited by, papilla surface area during the first weeks of lactation, which was affected by the rate of increase of concentrate allowance.
Adaptation of the rumen in transition dairy cattle: does function follow form?
Dieho, K. ; Bannink, A. ; Schonewille, J.T. ; Dijkstra, J. - \ 2015
In vitro gas and methane production from grass silages differing in maturity and N-fertilisation levels using adapted and mixed rumen fluid
Macome, F.M. ; Cone, J.W. ; Schonewille, J.T. ; Pellikaan, W.F. ; Hendriks, W.H. ; Dijkstra, J. ; Warner, D. - \ 2015
Effect of dietary protein levels on rumen metabolism and milk yield in mid-lactating cows under hot and humid conditions
Thiangtum, W. ; Schonewille, J.T. ; Yawongsa, A. ; Rukkwamsuk, T. ; Kanjanapruthipong, J. ; Verstegen, M.W.A. ; Hendriks, W.H. - \ 2014
Journal of Animal and Veterinary Advances 13 (2014)1. - ISSN 1680-5593 - p. 9 - 14.
An experiment was conducted to investigate the effects of 2 levels of dietary Crude Protein (CP) in concentrates with similar proportions of Rumen Undegradable Protein (RUP) on rumen metabolism, milk yield and composition in mid lactating cows in Thailand. Eight 87.5% Holsteinx12.5% indigenous multiparous cows were used in a crossover design with two successive 25 days periods. Diets contained 30% paragrass and 70% concentrate on a Dry Matter (DM) basis. Concentrate feeds were formulated to provide low dietary CP (17.3%; LCP) or high dietary CP (19.04%; HCP). The proportion of Rumen Degradable Protein (RDP) and RUP was 61 and 39% in both diets. Diets were isocaloric in terms of net energy for lactation. Milk yield, milk lactose yield, Dry Matter Intake (DMI) and apparent digestibility of DM, CP and Neutral Detergent Fiber (NDF) were greater in cows fed HCP than in those fed LCP. Concentration of blood urea nitrogen was elevated in cows fed HCP diets. Rumen NH3-N concentration and pH tended to increase in cows fed HCP diet. Rumen microorganism counts and volatile fatty acids levels in the rumen did not differ between treatments. The increasing CP content in mid-lactating cow was beneficial to increase DMI, apparent digestibility of DM, CP and NDF and therefore milk yield.
Improved acceptance of Chromonaela odorata by goat kids after weaning is caused by in utero exposure during late but not early pregnancy
Hai, P.V. ; Schonewille, J.T. ; Tien, D.V. ; Everts, H. ; Hendriks, W.H. - \ 2014
Applied Animal Behaviour Science 159 (2014). - ISSN 0168-1591 - p. 50 - 54.
feeding-behavior - fetal sheep - chromolaena-odorata - food preference - amniotic-fluid - maternal diet - milk - consumption - fetus - rat
The aim of the current experiment was to study the effect of the phase of pregnancy on in utero learning of Chromonaela odorata by the goat kids by comparing mid pregnancy (day 50–99, MP) with late pregnancy (day 100–145, LP). It was hypothesized that kids born to dams fed C. odorata during late pregnancy (day 100–145) would show an improved post-weaning consumption of this plant. Twenty four female goats (Co breed) were synchronized, inseminated and divided randomly into 4 equal groups. All pregnant goats were fed a diet either without (control) or with 50 g of C. odorata leave meal (COLM) at 10:00 am during 30 min during mid and late pregnancy. The COLM diet was fed either from 50 to 99 days of pregnancy (mid pregnancy, MP), or from 100 to 145 days of pregnancy (late pregnancy, LP) or from 50 to 145 days of pregnancy (MLP, positive control). After weaning (3 months old), one kid from each goat dam was selected to measure COLM intake for 30 min over a 4-week period. Feeding activities of the individually housed goat kids were monitored with a camera system. Post-weaning consumptions of COLM by the goat kids increased significantly (P <0.05) in the LP and MLP treatments and remained essentially unchanged in the control and MP treatments. The higher consumption of COLM by kids from the LP and MLP treatment was associated with a significantly (P <0.05) shorter latency to eat and a longer chewing time (P <0.05). It was concluded that transmission of feeding behaviour from mother to offspring occurs between day 100 to 145 of gestation and that it remains present at least 3 months after weaning in goats
Check title to add to marked list
<< previous | next >>

Show 20 50 100 records per page

 
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.