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云南宜胶区地处热带北缘,纬度北、海拔高。自1904年巴西橡胶引种到云南,截至目前已发展到六十五万余亩,每年可为国家提供橡胶一万多吨。 巴西橡胶在系统发育过程中,从未遇到过低温寒害问题。二十七年的植胶实践证实,寒害是本省发展橡胶的主要矛盾。在重寒区的阴坡和半阴坡,中寒区的陡阴坡,没有一个高产无性系不遭受严重寒害的,培育抗寒高产有性系,是扩大植胶面积的根本途径。
Yili District of Yunnan is located in the northern edge of the tropical latitude north, high altitude. Since the introduction of Brazilian rubber to Yunnan in 1904, it has grown to over 650,000 mu so far and can provide over 10,000 tons of rubber to the country each year. Brazilian rubber in the system development process, have never encountered the problem of low temperature and cold injury. Twenty-seven years of plastic planting practice confirmed that cold damage is the development of the province’s main contradiction rubber. In the heavy cold area of the shady and semi-shady slopes, steep shady slopes in the cold area, no high-yield clones do not suffer severe cold injury, cultivate cold-resistant high-yield sexual line, is to expand the fundamental means of plasticized area.