Integrated rumen-animal-manure analysis of dairy emission mitigation by feeding apple pomace and hempseed cake
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Agri-food by-products are underused feed resources with the potential to reduce dairy emissions, yet most studies examined rumen and manure stages separately, which mask whole-system effects and shift environmental burdens between stages. This study is the first to assess the effects of incorporating apple pomace (AP) and hempseed cake (HC) into dairy cow diets on nitrogen and methane (CH 4 ) emissions, across the entire milk production chain, from rumen fermentation to downstream manure storage. A 3 (treatments) x 3 (Periods) Latin square design was used with 15 cows, treatment diets included (1) CON (control diet): basal diets with forage and concentrates; (2) AP: 10 % of AP replacing forage; (3) HC: 10 % of HC replacing concentrates. Faeces and urine outputs were collected separately from animals, for manure storage experiment. Feeding AP and HC decreased ( P < 0.01), respectively, enteric CH 4 production by 6.3 % and 6.7 %, CH 4 /feed intake by 10.6 % and 10.1 %, and CH 4 /milk yield by 9.8 % and 10.9 %. Inclusion of AP decreased urine N /total N intake, compared to CON and HC ( P < 0.05). In manure storage, the AP decreased the cumulative ammonia (NH 3 ) and CH 4 emissions by 24.8 % and 27.4 % than CON, respectively ( P < 0.05). The above mitigation actions through feeding AP and HC, when working together in implementation for feeding dairy cows, could decrease annual CO 2 equivalent emissions by 13 % and 10 % respectively. This is the first integrated study combining rumen fermentation with manure impacts, showing that AP and HC inclusion can be a practical approach to mitigate emissions in dairy farming. • Dietary inclusion of apple pomace and hempseed cake reduced the enteric methane emissions of dairy cows. • Dietary inclusion of apple pomace shifts the cows’ nitrogen output from urine to faece. • Less NH 3 and CH 4 emissions were produced in manure collected from cows fed apple pomace. • Both apple pomace and hempseed cake potentially contribute to less greenhouse effect.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.003 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it