关键词: 空间滞后模型, 空间滞后模型

Abstract: The adaptation of embryo-transferred Holstein dairy cows to the ecological condition of Jiuquan was evaluated in this paper through the study of growing indexes of the Holstein cows of different receptors in Jiuquan Area. The indexes of body size and weight of 45 embryo-transferred Holstein offspring of Local-crossbred cows, Simmental-crossbred cows and Chinese holstein cows in Jiuquan Area of Gansu in different periods of 0-day, 6-month and 12-month were examined respectively by the method of comparing their growing indexes and analyzing the correlation. The results showed that the body size and weight of cows of these three kinds of receptors increased with age, and their body height, weight and bust size grew rapidly in the first 12 months, but the circumference of their cannon bone grew slowly. The correlation coefficients of their body size and weight in these three stages were all above 0.90, and there was a highly statistical significance among the correlation coefficients (P=0.000<0.01). And there was a significantly positive correlation and a very good linearity between body size and body weight. The embryo-transferred Holstein cows had strong adaptation to the eco-climatic conditions of Jiuquan Area.