Analysis on reproduction age in Larix chinensis and effect factors

The average reproduction age、maximum reproduction age and minimum reproduction age of Larix chinensis were studied in this paper, the relationships between the reproduction age and the environment factors were also discussed. The result shows that the average reproduction age was 78.59 years, the minimum reproduction age was 26 years, and the maximum reproduction age was 208 years. In South Slope, the average reproduction age was 72.97 years, the minimum reproduction age was 26 years, and the maximum reproduction age was 153 years. In North Slope, the average reproduction age was 92 years, the minimum reproduction age was 29 years, and the maximum reproduction age was 208 years. The average reproduction age shows positive correlation to altitude and annual precipitation, the maximum reproduction age was positive correlation to slope and negative correlation to the minimum reproduction age, this shows that the earlier reproduction decrease the time of reproduction.