緬羊の化学的抜毛法に関する研究

概要

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Recently, the chemical defleecing offered a hope of alleviating the serious situation of current worldside shortage of shearers. The experiments were carried out to make clear the effects of cyclophosphamide (CPA) on some blood compositions (Trial I, 1973), the defleecing and the regrowth of wool (Trial I ; II, 1974 and III, 1975) of the sheep treated with 30 mg of CPA per kilogram of the body weight and also to know the behaviour and the heart rate of the sheep after removal of wool (Trial II and III). Results obtained were as follows 1. The wool began to fall off from skin after 7 days and the lost wool from sheep treated with CPA increased markedly after 10 days. 2. The sheep defleeced within 14 days of dosing were quite bare and not protected from sunburn or abrasions during 4 weeks after administration of the drug until the new wool grew out 5 to 8 mm of the length. 3. Erythrocytes number, hematocrit value and plasma protein concentrates in venous blood were not affected by CPA treatment. However, leucocytes number of the sheep treated with CPA decreased markedly after one day, but tended to increase after about 5 days and reached to the usual level after two weeks. 4. The sheep showed more standing behaviour than lying after defleecing. 5. The heart rate which was increased by removing the wool became steady during 7 days and then reached to the normal level after 4 weeks.
信州大学農学部の論文