238 Impact of Increasing Standardized Ileal Digestible Tryptophan to Lysine Ratio in Diets Containing 20% Corn Distillers Dried Grains with Solubles fed to Growing-Finishing Pigs
Bibliographic record
Abstract
Abstract A study was conducted to investigate the optimal standardized ileal digestible (SID) Trp to Lys ratio in diets containing a moderately high level (20%) of corn distillers dried grains with solubles (DDGS) fed to growing-finishing pigs. A total of 2,232 pigs [initial body weight (BW) = 31.41 kg ± 0.53 kg] were allotted to a randomized complete block design with 4 dietary treatments (18 pens/treatment; 31 pigs/pen, mixed gender) and fed experimental diets for 15 wk in a 6-phase feeding program. The level of SID Trp/Lys in each treatment was formulated to 0.15, 0.18, 0.21, and 0.24, respectively, and was manipulated by crystalline Trp inclusion. Within each phase, diets were formulated to be isocaloric and contained equal provisions of SID Lys, sulfur containing amino acids, Thr, and Ile. Diets met or exceeded NRC (2012) estimated nutrient requirements. The levels of SID Thr/Lys (0.65 – 0.70 from grower to finisher) and SID Ile/Lys (0.60 – 0.62 from grower to finisher) were adjusted to a greater level to accommodate the potential negative effects of greater levels of fiber and Leu, respectively, from the inclusion of DDGS. Results were analyzed using the lme4 package of R 4.1.2, and the statistical models included the fixed effect of SID Trp/Lys and the random effect of body weight block. Orthogonal contrasts were used to test linear and quadratic effects of increasing dietary SID Trp/Lys (Table 1). Results indicated that increasing SID Trp/Lys in diets containing 20% corn DDGS improved final body weight (FBW) in a quadratic pattern (128.67, 130.61, 130.83, and 130.37 kg, for diets formulated to SID Trp/Lys at 0.15, 0.18, 0.21, and 0.24, respectively, P < 0.05). Average daily feed intake (ADFI) was quadratically increased with increasing SID Trp/Lys (2.51, 2.57, 2.60, and 2.57 kg/d, respectively, P < 0.05). A linear tendency was observed on average daily gain (ADG) with increasing SID Trp/Lys (0.96, 0.98, 0.98, and 0.98 kg/d, respectively, P < 0.10). In summary, increasing SID Trp/Lys in diets with moderately high levels of corn DDGS improved FBW and ADFI in a quadratic pattern and tended to increase ADG linearly.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".