Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat Stress
The aim of this research was to study the Effect of reduction in dietary protein on fertility performance of lactating Holstein cows during heat stress. For this we used 63 Holstein dairy cows (71 ± 16.5 DIM) after voluntary waiting period and has been confirmed that the health reproduction based on...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | fas |
| Published: |
Ferdowsi University of Mashhad
2016-06-01
|
| Series: | پژوهشهای علوم دامی ایران |
| Subjects: | |
| Online Access: | http://ijasr.um.ac.ir/index.php/animal/article/view/31531 |
| _version_ | 1818725240399724544 |
|---|---|
| author | V. Gholami H. Amanlou M.H. Shahir H.R. Mirzaei alamouti |
| author_facet | V. Gholami H. Amanlou M.H. Shahir H.R. Mirzaei alamouti |
| author_sort | V. Gholami |
| collection | DOAJ |
| description | The aim of this research was to study the Effect of reduction in dietary protein on fertility performance of lactating Holstein cows during heat stress. For this we used 63 Holstein dairy cows (71 ± 16.5 DIM) after voluntary waiting period and has been confirmed that the health reproduction based on randomized complete block design. Randomly, cows enrolled to the one of three experimental rations (18.5, 17.5, 16.5% CP). All cows were inseminated according to Heat-Synch protocol. Ovarian structure was defined by ultrasound twice in protocol. The number of small (< 5 mm), medium 2 (5 to 9.9 mm), and large (> 10 mm) follicles were counted by ultrasonography. Cumulative conception rate to first and second service was 47.7, 52.4 and 76.2 % for treatments 1, 2 and 3 respectively. Numbers of Service per conception were 2.07, 2.03 and 1.53. Days open 131.7±26, 132.5±18 and 121.16±22 d for treatments 1, 2 and 3 respectively. In conclusion increase in the level of crude protein of diet above recommended NRC (2001) because of increase in blood urea nitrogen and harmful effects on uterine health and decrease in fertility during heat stress not recommended. |
| first_indexed | 2024-12-17T21:39:10Z |
| format | Article |
| id | doaj.art-cc2697a4c01747349880128c5c694b02 |
| institution | Directory Open Access Journal |
| issn | 2008-3106 2423-4001 |
| language | fas |
| last_indexed | 2024-12-17T21:39:10Z |
| publishDate | 2016-06-01 |
| publisher | Ferdowsi University of Mashhad |
| record_format | Article |
| series | پژوهشهای علوم دامی ایران |
| spelling | doaj.art-cc2697a4c01747349880128c5c694b022022-12-21T21:31:40ZfasFerdowsi University of Mashhadپژوهشهای علوم دامی ایران2008-31062423-40012016-06-01537097Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat StressV. GholamiH. AmanlouM.H. ShahirH.R. Mirzaei alamoutiThe aim of this research was to study the Effect of reduction in dietary protein on fertility performance of lactating Holstein cows during heat stress. For this we used 63 Holstein dairy cows (71 ± 16.5 DIM) after voluntary waiting period and has been confirmed that the health reproduction based on randomized complete block design. Randomly, cows enrolled to the one of three experimental rations (18.5, 17.5, 16.5% CP). All cows were inseminated according to Heat-Synch protocol. Ovarian structure was defined by ultrasound twice in protocol. The number of small (< 5 mm), medium 2 (5 to 9.9 mm), and large (> 10 mm) follicles were counted by ultrasonography. Cumulative conception rate to first and second service was 47.7, 52.4 and 76.2 % for treatments 1, 2 and 3 respectively. Numbers of Service per conception were 2.07, 2.03 and 1.53. Days open 131.7±26, 132.5±18 and 121.16±22 d for treatments 1, 2 and 3 respectively. In conclusion increase in the level of crude protein of diet above recommended NRC (2001) because of increase in blood urea nitrogen and harmful effects on uterine health and decrease in fertility during heat stress not recommended.http://ijasr.um.ac.ir/index.php/animal/article/view/31531Conception rateFertilityfollicleCrude proteinHeat stress |
| spellingShingle | V. Gholami H. Amanlou M.H. Shahir H.R. Mirzaei alamouti Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat Stress پژوهشهای علوم دامی ایران Conception rate Fertility follicle Crude protein Heat stress |
| title | Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat Stress |
| title_full | Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat Stress |
| title_fullStr | Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat Stress |
| title_full_unstemmed | Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat Stress |
| title_short | Effect of Reduction in Dietary Protein on Fertility Performance of Lactating Holstein Cows during Heat Stress |
| title_sort | effect of reduction in dietary protein on fertility performance of lactating holstein cows during heat stress |
| topic | Conception rate Fertility follicle Crude protein Heat stress |
| url | http://ijasr.um.ac.ir/index.php/animal/article/view/31531 |
| work_keys_str_mv | AT vgholami effectofreductionindietaryproteinonfertilityperformanceoflactatingholsteincowsduringheatstress AT hamanlou effectofreductionindietaryproteinonfertilityperformanceoflactatingholsteincowsduringheatstress AT mhshahir effectofreductionindietaryproteinonfertilityperformanceoflactatingholsteincowsduringheatstress AT hrmirzaeialamouti effectofreductionindietaryproteinonfertilityperformanceoflactatingholsteincowsduringheatstress |