PRODUCTIVE LONGEVITY OF SIMMENTAL BREED COWS, DEPENDING ON THE VOLUME OF MILK YIELD, METHOD OF KEEPING AND STUD-BULLS FROM DIFFERENT COUNTRIES OF ORIGIN
Bibliographic record
Abstract
Проведен анализ продуктивных качеств коров в племенных стадах симментальской породы, изучено продуктивное долголетие в зависимости от удоя за 1-ю лактацию, способа содержания и быков-отцов разной селекции симментальской и голштинской пород (красно-пестрой масти). Исследования проведены в Центральном федеральном округе на 8264 выбывших коровах. Выявлено, что с увеличением удоя снижается продолжительность производственного использования животных. На базе стад с разными способами содержания и удоем 7,0—7,5 тыс. кг молока выяснили, что при отсутствии моциона сокращается продолжительность использования коров на 8% относительно беспривязного и комбинированного (зимой моцион в загонах, а летом — круглосуточно на площадках). Удой первотелок при привязном содержании (7914 кг) был выше в сравнении с беспривязным на 606 кг и комбинированным — на 1143 кг способами содержания. При большем удое по 1-й лактации сохранность коров снижалась. При минимальной продуктивности (4,1—5,0 тыс. кг) она составляла 67—75%, при максимальной (10,1—11,0 тыс. кг) — 10—21%. Суммарный удой коров от быков симментальской породы отечественной селекции относительно сверстниц, полученных от быков зарубежной селекции, был выше на 2,4—7,2 тыс. кг, а период использования продолжительнее на 0,3—1,1 лактации. Дочери быков улучшающей голштинской породы отечественной селекции, в сравнении со сверстницами от отцов зарубежной селекции, имели наибольшее превосходство над первотелками от быков канадской селекции и США по суммарному удою (7,9—11,6 тыс. кг) и продолжительности использования (1,1—1,7 лактации). Наименьшее продуктивное долголетие было у коров при привязном содержании без моциона и с максимальной величиной удоя по 1-й лактации. We have analyzed the productivity qualities of Simmental cows in breed herds, studied productive longevity depending on milk yield per 1st lactation, keeping method and Simmental and Holstein (red-and-white in color) stud-bulls of different breeding. The research was made on the territory of Central Federal District on 8264 retired cows. It was found out that with an increase in milk yield, the duration of the production use of animals’ decreases. On the basis of herds with different methods of keeping and milk yield of 7.0—7.5 thousand kg of milk, it was found that in the lack of exercise, the duration of cows' use is reduced by 8% relative to loose housing and combined methods (in winter exercise is yards, and in the summer within 24 hours in the areas). The milk yield of first-calf cows under the conditions of tying method (7914 kg) was 606 kg higher than while a loose housing and 1143 kg higher than while a combined method. With greater milk yield on the 1st lactation decreased the сow livability. At the minimum productivity (4.1—5.0 thousand kg), it amounted to 67—75%, and at the maximum (10.1—11.0 thousand kg) it was 10—21%. The total milk yield of cows from Simmental bulls of domestic breed relative to cows of the same age from bulls of foreign breed was higher by 2.4—7.2 thousand kg, and the period of use was longer by 0.3—1.1 lactations. The cows from the upgraded Holstein bulls of domestic breed, in comparison with cows of the same age bulls of foreign breed, had the greatest superiority over the first-calf cows from bulls of Canadian and American breeds in total milk yield (7.9—11.6 thousand kg) and duration of use (1.1—1.7 lactation). The least productive longevity had cows kept under the conditions of tying method, without exercise and with a maximum milk yield per 1st lactation.
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How this classification was reachedexpand
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 | 0.001 | 0.001 |
| 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 | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 teacher head, 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".