Effects of supplementation with betaine and superdosed phytase on semen characteristics of boars during and after mild heat stress
| Autor: | B. T. Richert, J A Proctor, D. W. Lugar, T. Gellert, Kara R Stewart, P. Wilcock |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
endocrine system Mild heat BOAR Chemistry media_common.quotation_subject Soybean meal 0402 animal and dairy science Semen 04 agricultural and veterinary sciences 040201 dairy & animal science Crossbreed 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology Animal science Betaine Animal Science and Zoology Phytase Reproduction Food Science media_common |
| Zdroj: | The Professional Animal Scientist. 34:326-338 |
| ISSN: | 1080-7446 |
| DOI: | 10.15232/pas.2018-01742 |
| Popis: | The purpose of this experiment was to evaluate the effects of betaine and superdosed phytase on boar reproduction during mild heat stress. Twenty-seven mature (36 wk old), crossbred boars [Duroc × (Landrace × Yorkshire)] were randomly allocated to treatment and were fed 2.6 kg/d of 1 of 3 corn, soybean meal diets: control (CNT; 250 phytase units/kg Escherichia coli phytase; n = 9), betaine (BET; 250 phytase units/kg E. coli phytase and 0.6% betaine; n = 9), and betaine and superdosed phytase (BP; 2,500 phytase units/kg E. coli phytase and 0.6% betaine; n = 9). The experiment was split into 4 environmental phases (4 wk/phase) consisting of pre-heat stress (26°C), heat stress (30.2°C), post-heat stress 1 (16.7°C), and post-heat stress 2 (17.5°C). Semen was collected weekly from each boar and was evaluated for semen quantity and quality parameters. Total motility, progressive motility and percentage of morphologically normal sperm were reduced in the heat stress period (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|