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cje ›› 1988, Vol. ›› Issue (5): 41-45,49.

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Breed Formation and It's Ecological Variation Patterns of Ass in Shanxi Province

Duan Yahbin, Zhang Ruixue   

  1. Animal Husbandry Bureau of Yulin prefecture, Shanxi province
  • Received:1987-04-03 Revised:1987-06-15 Online:1988-10-10

Abstract: Through comparing the quantitative distribution, formation history, body size, weight and blood physiological indexes among three ass breeds in Shanxi province, the variation patterns of ass breeds in different eco-environments were discussed, which provided scientific basis for the future preservation of fine ass breeds and the designing of breeding zones.

Key words: Grazing, Photosynthesis, Respiration, Carbon, Nitrogen