Study on the determination of quantitative maturity age for fine variety of Section leuce in Ili River basin

In this study, taking Section leuce in Ili region as experimental materials, fine variety of S. leuce with high growth rate and more suitable for Ili River basin were selected by using clustering method, and quantitative maturity age of the fine variety of S. leuce was predicted to provide theoretical basis for production and management of S. leuce. The results showed that, by classification analysis S. leuce in Ili region could be divided into two categories, one category had high growth rate with the average tree height growth of 25.63 m, an average annual growth of 1.602 m, with the average diameter of 41.9 cm, an average annual growth of 2.619 cm, with the average volume of 1.337 m3, an average annual growth of 0.084 m3; the second category had ow growth rate with the average tree height growth of 23.28 m, an average annual growth of 1.455 m, with the average diameter of 25.98 cm, an average annual growth of 1.624 cm, with the average volume of 0.506 m3, an average annual growth of 0.032 m3. The quantitative maturity age of S. leuce with high growth rate was 14-25 years. Key