Abstract
The study was conducted to compare lignin ratio (LR) and in vitro DM digestibility (IVDMD) techniques as methods for estimating in vivo DMI and digestibility of pasture vegetation in range managed sheep. Four intact and 2 oesophageal cannulated rams were allowed to graze on cenchrus pasture throughout the year. The digestion trials were conducted in monsoon, winter and summer. In each trial total faeces from 4 intact ram was collected for 5 days by titting harness and faecal bags. During the same period diet samples. were collected from 2 oesophageal cannulated rams. Lignin content of oesophageal extrusa increased from monsoon to winter and summer with similar seasonal trends in its voidance in the faeces. The faecal output also varied in the seasons commensurating with DMI of the animals. Correlation coefficient of faecal output with DMI of animals pooled for 3 seasons and 2 methods were 0.89, DMI was over estimated by 4.8 % in monsoon and 7.3 % in summer using IVDMD compared to LR method, while DMD estimated by both the methods was similar in winter. Similar seasonal trends were observed in estimation of DMI by the 2 methods from total faecal DM voided. The DMI could be predicted with 91-93% confidence by the 2 faecal sampling methods. Thus it is concluded that rVDMD and LR methods estimate similar DMI and DMD in grazing sheep.
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Claims 7
Claim · model-written summary
Faecal output and dry matter intake of grazing sheep were correlated at 0.89 across seasons and methods.
CenchrusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed to graze on cenchrus pasture throughout the year”
e1“Correlation coefficient of faecal output with DMI of animals pooled for 3 seasons and 2 methods were 0.89”
Claim · model-written summary
In monsoon, the IVDMD method over-estimated DMI by 4.8 % compared with the LR method.
- Treatment
- IVDMDe2
- Outcome
- DMIe2
- Direction
- over estimatede2
- Value
- 4.8 %e2
- Comparator
- LR methode2
- Setting
- monsoone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed to graze on cenchrus pasture throughout the year”
e2“DMI was over estimated by 4.8 % in monsoon and 7.3 % in summer using IVDMD compared to LR method”
Claim · model-written summary
In summer, the IVDMD method over-estimated DMI by 7.3 % compared with the LR method.
- Treatment
- IVDMDe2
- Outcome
- DMIe2
- Direction
- over estimatede2
- Value
- 7.3 %e2
- Comparator
- LR methode2
- Setting
- summere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed to graze on cenchrus pasture throughout the year”
e2“DMI was over estimated by 4.8 % in monsoon and 7.3 % in summer using IVDMD compared to LR method”
Claim · model-written summary
In winter, DMD estimated by both methods was similar.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed to graze on cenchrus pasture throughout the year”
e3“while DMD estimated by both the methods was similar in winter”
Claim · model-written summary
Seasonal trends in DMI estimated by the two methods were similar.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed to graze on cenchrus pasture throughout the year”
e4“Similar seasonal trends were observed in estimation of DMI by the 2 methods from total faecal DM voided”
Claim · model-written summary
DMI could be predicted with 91-93% confidence by the two faecal sampling methods.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed to graze on cenchrus pasture throughout the year”
e5“The DMI could be predicted with 91-93% confidence by the 2 faecal sampling methods”
Claim · model-written summary
The authors conclude that the rVDMD and LR methods estimate similar DMI and DMD in grazing sheep.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed to graze on cenchrus pasture throughout the year”
e6“Thus it is concluded that rVDMD and LR methods estimate similar DMI and DMD in grazing sheep”