岳西县位于大别山腹部，29％茶园多分布于海拔500-800m山间。年平均极端最低气温为一10．1"C；冬季时间长达135天；12月、l月、2月的冻土层分别为13cm、15cm、scm。多年平均伏旱频率为54·2％，秋冬连旱的频率为29．2％。1992年开始大量引进繁殖无性系良种茶苗，克服冻与旱、提 Yuexi County is located in the belly of the Dabie Mountains, 29% of the tea plantations are mostly distributed in the mountains 500-800m above sea level. The average annual mean minimum temperature is 10.1 ℃, the winter time is 135 days, the permafrost in December, January and February is 13cm, 15cm and scm, respectively. The mean annual drought frequency is 54.2% , The frequency of autumn and winter drought was 29.2% .In 1992, the introduction of a large number of breeding clonal hybrid seedlings, to overcome the freeze and drought, to mention