培育抗寒高产的橡胶优良新品种是我国选育种工作的特色.利用抗寒前哨梯度试验是利用空间,争取时间加速选育抗寒高产品种提供有效的鉴定手段.近年来,由于冬期气候偏暖,地处闽南漳州的试验点难于比较无性系间耐寒水平的差异,给橡胶抗寒选育种工作选成时间和物力的浪费.在纬度较北的试种区如惠安、仙游及永春前哨点,由于地理位置的差别,在一般年份的冬期,日均温≤12℃的天数和负积温有着明显的差异且从南往北逐渐增多.据省热作气象试验站统计分析,在25个气象因子中,日均温≤12℃的天数和负积温,二个因子相关系数最高且与胶树4～6级的生产性寒害最密切.这两个因子能较好地 Breeding cold-resistant and high-yielding excellent new varieties of rubber is the specialty of breeding work in our country.Using cold-resistant outpost gradient test is to provide effective identification methods by using space and speeding up the breeding of high-yielding and cold-resistant varieties in time.In recent years, Warm, is located in southern Fujian Zhangzhou test point is difficult to compare the level of cold tolerance between clones, to rubber cold hard work breeding selected time and material resources waste.In the northern latitude test areas such as Huian, Xianyou and Yongchun Sentinel, due to geographical differences, in the winter in general years, the average daily temperature ≤ 12 ℃ days and negative accumulated temperature has obvious differences and gradually increased from south to north.According to the provincial hot weather station statistical analysis, at 25 Among the meteorological factors, the days with daily average temperature≤12 ℃ and the negative accumulated temperature had the highest correlation coefficient between the two factors and the most productive chilling hazard with grades 4-6 of the gum tree.