Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cows
The objective of this study was to investigate the metabolism of inorganic and organic Se sources at different dietary Se levels in lactating goats and dairy cows. The study consists of two experiments on goats dosed singly, either orally with grass sprayed with Na275SeO3 one week before cutting, in...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Scientific Agricultural Society of Finland
1991-01-01
|
| Series: | Agricultural and Food Science |
| Online Access: | https://journal.fi/afs/article/view/72394 |
| _version_ | 1819078570763354112 |
|---|---|
| author | Pentti Aspila |
| author_facet | Pentti Aspila |
| author_sort | Pentti Aspila |
| collection | DOAJ |
| description | The objective of this study was to investigate the metabolism of inorganic and organic Se sources at different dietary Se levels in lactating goats and dairy cows. The study consists of two experiments on goats dosed singly, either orally with grass sprayed with Na275SeO3 one week before cutting, intraruminally (I.R.) with Na275SeO3, or intravenously (I.V.) with Na275SeO3 or 75Se-selenomethionine. Follow-up periods were from 15 to 28 d long. Dietary Se levels were 0.05, 0.22 and 0.34 mg/kg DM. Values for 75Se absorption, excretion in milk, urine and faeces, 75Se activity in plasma, erythrocytes and hair are presented. In another experiment lasting 539 d, 48 dairy cows were fed either Na275SeO3 or grass silage sprayed with Na275SeO3 one week before cutting. Dietary Se levels were from 0.03 to 1.8 mg/kg DM. Se content in milk, plasma and erythrocytes, and GSH-Px activity in erythrocytes and plasma are given. True absorption of 75Se was 63 % and 65 %, and excretion of 75Se in milk 4 % and 7 % in the goats dosed I.R. with Na275SeO3 and orally with 75Se-labeled grass. The effect of dietary Se content was non-significant. After I.V. dose, 3.6 % and 33 % of 75Se was excreted in milk in goats dosed with Na275SeO3 and 75Se-selenomethionine, respectively, Na275SeO3 being eliminated mainly via urine. In cows receiving selenium as Na275SeO3, milk contained 0.011, 0.011, 0.016 and 0.020 mg Se/l at dietary Se levels 0.11, 0.17, 0.42 and 0.68 mg/kg DM, respectively. In cows receiving Se-sprayed silage, milk Se content was 0.023, 0.020, 0.029 and 0.040 mg/l when the diet contained 0.09, 0.20, 0.45 and 1.20 mg Se/kg DM. Se incorporated into silage was more efficient (p |
| first_indexed | 2024-12-21T19:15:12Z |
| format | Article |
| id | doaj.art-4b25b0f587914c99bf9853ebeaa61d9f |
| institution | Directory Open Access Journal |
| issn | 1459-6067 1795-1895 |
| language | English |
| last_indexed | 2024-12-21T19:15:12Z |
| publishDate | 1991-01-01 |
| publisher | Scientific Agricultural Society of Finland |
| record_format | Article |
| series | Agricultural and Food Science |
| spelling | doaj.art-4b25b0f587914c99bf9853ebeaa61d9f2022-12-21T18:53:05ZengScientific Agricultural Society of FinlandAgricultural and Food Science1459-60671795-18951991-01-01631Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cowsPentti Aspila0Department of Animal Husbandry, University of Helsinki, SF-00710 Helsinki, FinlandThe objective of this study was to investigate the metabolism of inorganic and organic Se sources at different dietary Se levels in lactating goats and dairy cows. The study consists of two experiments on goats dosed singly, either orally with grass sprayed with Na275SeO3 one week before cutting, intraruminally (I.R.) with Na275SeO3, or intravenously (I.V.) with Na275SeO3 or 75Se-selenomethionine. Follow-up periods were from 15 to 28 d long. Dietary Se levels were 0.05, 0.22 and 0.34 mg/kg DM. Values for 75Se absorption, excretion in milk, urine and faeces, 75Se activity in plasma, erythrocytes and hair are presented. In another experiment lasting 539 d, 48 dairy cows were fed either Na275SeO3 or grass silage sprayed with Na275SeO3 one week before cutting. Dietary Se levels were from 0.03 to 1.8 mg/kg DM. Se content in milk, plasma and erythrocytes, and GSH-Px activity in erythrocytes and plasma are given. True absorption of 75Se was 63 % and 65 %, and excretion of 75Se in milk 4 % and 7 % in the goats dosed I.R. with Na275SeO3 and orally with 75Se-labeled grass. The effect of dietary Se content was non-significant. After I.V. dose, 3.6 % and 33 % of 75Se was excreted in milk in goats dosed with Na275SeO3 and 75Se-selenomethionine, respectively, Na275SeO3 being eliminated mainly via urine. In cows receiving selenium as Na275SeO3, milk contained 0.011, 0.011, 0.016 and 0.020 mg Se/l at dietary Se levels 0.11, 0.17, 0.42 and 0.68 mg/kg DM, respectively. In cows receiving Se-sprayed silage, milk Se content was 0.023, 0.020, 0.029 and 0.040 mg/l when the diet contained 0.09, 0.20, 0.45 and 1.20 mg Se/kg DM. Se incorporated into silage was more efficient (phttps://journal.fi/afs/article/view/72394 |
| spellingShingle | Pentti Aspila Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cows Agricultural and Food Science |
| title | Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cows |
| title_full | Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cows |
| title_fullStr | Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cows |
| title_full_unstemmed | Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cows |
| title_short | Metabolism of selenite, selenomethionine and feed-incorporated selenium in lactating goats and dairy cows |
| title_sort | metabolism of selenite selenomethionine and feed incorporated selenium in lactating goats and dairy cows |
| url | https://journal.fi/afs/article/view/72394 |
| work_keys_str_mv | AT penttiaspila metabolismofseleniteselenomethionineandfeedincorporatedseleniuminlactatinggoatsanddairycows |