杉木种子涩籽地理流行趋势的研究

本文应用趋势面分析福建省杉木种子涩籽地理流行趋势，建立涩籽地理流行数学模型，阐述其流行规律，绘制山涩籽地理流行图，并将其划分成四个区：1．闽西南杉木涩籽流行递减区；2．闽东南杉木涩籽流行递增区；3．闽北杉木涩籽流行递减区：4，闽中北闽西北杉木涩籽流行渐稳区。同时建议将大型杉木种子园建在建瓯县。

A STUDY ON THE TREND OF GEOGRAPHIC EPIDEMIC OF CHINESE FIR STERILE SEED

The paper, applying trend-surface analysis (TSA) to the geographic epidemic of Chinese fir seeds in Fujian Province by giving the quadratic polynomial model, interpreting the Chinese fir sterile seed epidemic pattern, drawing the sterile seed epidemic figure and dividing it into four areas: 1. The progressively decreasing region for the sterile seed epidemic in the southwest of Fujian; 2. The progressively increasing region for the sterile seed epidemic in the southeast of Fujian; 3. The progressively decreasing region for the sterile seed epidemic in the north of Fujian; and 4. the progressively steady region for the sterile seed epidemic in the centre and the northwest of Fujian. It is suggested that the habitat of China-fir seed orchard should be selected in Jianou in the progressively steady region.