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为掌握杉木种子园母树的生长结实规律,探索种子园的经营管理措施,使种子园稳产、高产和提高其种子品质,我们对排牙山林场1973年春用45株优树材料建立的杉木种子园,选择其中15亩进行了生长和结实状况的观测。基本情况种子园位于排牙山林场青藏工区,地理位置为东径109°34′,北纬26°27′,海拔450米,年平均气温16.2～17.3℃,绝对最高气温33.4℃,最低气温—3.4℃,年平均相对湿度32％,年降雨量1200～1500毫米(多集中在4～6月份),年蒸发量
In order to grasp the law of growth and maturation of the parent tree of Cunninghamia lanceolata and explore the operation and management measures of the seed orchard, make the seed orchard stable, high yield and improve the quality of its seeds, we constructed the Cunninghamia lanceolata seed orchard , 15 mu of them were selected for observation of the growth and solid state. Basic Conditions The Seed Park is located in the Qingzang Work Area of the Yayingshan Forest Farm with a geographical location of 109 ° 34’E and 26 ° 27’N at an altitude of 450 meters with an annual average temperature of 16.2-17.3 ℃, an absolute maximum temperature of 33.4 ℃ and a minimum temperature of -3.4 ℃, annual average relative humidity 32%, annual rainfall of 1200 ~ 1500 mm (mostly concentrated in April to June), annual evaporation