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本调查工作于四月中、下旬对永春、惠安、紫帽山等前哨点和漳州、厦门试验点1967—1973年建立的各类型系比区的橡胶品种进行初查及复查工作。受去冬今春低温的影响,永春前哨点出现严重霜冻,使1973年有性系比区一龄杂种苗全部冻死和1972年无性系比区大部分品种均受5级以上寒害。其它各点的系比区的橡胶品种对不同低温的反应是敏感的,其中对辐射霜冻有一定忍耐能力的有:万陆1、闽林71—10、湛试92—8、天任31—45×南强1—97等;对平流低温有一定忍耐能力的有:热作64—10、大沙64—4、天任31—45×热作66—2、天任31—45×亭亮291和天任31—45×大沙64—3等;
The survey was conducted in the middle and late April for preliminary examination and review of the rubber varieties of various types of ratio zones established in 1967-1973 at the pilot stations of Yongchun, Huian and Zhaimaoshan, and Zhangzhou and Xiamen. Affected by the cold temperatures of winter and spring, there was a serious frost in the Yongchun outpost, which made all the frostbite of the first sexual hybrid seedlings in the sexual line in 1973 and most of the clones in the clonal ratio zone in 1972 suffered more than grade 5 cold damage. Other points of the rubber than the district of different low temperature response is sensitive to the radiation frost have a certain patience are: Wan Lu 1, Minlin 71-10, Cham test 92-8, Tian Ren 31- 45 × South Strong 1-97, etc .; have some tolerance to the advection of low temperature: hot for 64-10, 64-4 sand, day any 31-45 × hot work 66-2, day any 31-45 × Pavilion Bright 291 and the day any 31-45 × 64s and other large sand;