| Autor: |
J.G.M. Bakker, J.H. Westerhuis, K. Vreman, J. van den Hoek, H. de Visser, A.H. Roos, L.G.M. Th. Tuinstra |
| Rok vydání: |
1977 |
| Předmět: |
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| Zdroj: |
Netherlands Journal of Agricultural Science. 25:303-312 |
| ISSN: |
0028-2928 |
| DOI: |
10.18174/njas.v25i4.17127 |
| Popis: |
The 9 cows used in the preceding trial [see DSA 39, 2470] were allocated during the dry period (approx. 8 wk) to 3 levels of aldrin, heptachlor and beta -hexachlorocyclohexane ( beta -BHC) mixed with the concentrate ration. The daily dosages/cow were (i) 0.5, (ii) 1 or (iii) 2 mg of each pesticide. Because the date of parturition could only be predicted roughly, the dry period/cow varied resulting in large differences in total doses for cows within a group; mean total dose of each pesticide was (i) 26, (ii) 56 and (iii) 87 mg/cow. The pesticide levels in milk fat after parturition did not only represent the effect during the dry period because the cows had also been dosed with pesticides late in the preceding lactation. Aldrin and heptachlor residues in milk fat were below the detection limit of 0.01 mg/kg and content of beta -heptachlor epoxide was |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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