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Using vague adaptive optimization method, to optimize new species of natural rubber since the founding of nation. For rubber plantations in Hainan, suitable species for wind resistant and drought tolerant natural rubber include Dafeng95, Reyan7-33-97, Yunyan77-2, Yunyan77-4, and Haiken1 and so on. Introduction Under the constraints of limited natural resources and relatively poor natural conditions, the fundamental way for China’s natural rubber industry development relies on scientific innovation in natural rubber cultivation. With the core technology to explore the potential of nature resources, increase the yield of per unit and finally expand the new way to fulfill the self-sufficient of natural rubber production. Chinese scientists have managed to breed various new natural rubber species, such as Reyan7-33-97, Reyan7-20-59, Dafeng95, Yunyan77-2, and Yunyan77-4, since 1949. However, because of lacking of necessary investment. The rubber industry has also been facing problems like underdeveloped infrastructure, slow-paced adaptation of new species and unreasonable rubber tree age structure, high proportion of low yield plantations, and lagged renewal of plantations. Currently, China still mainly grows rubber tree clones (RRIM600, PR107, and GT1) introduced from abroad in 1950s and 1960s, while the cultivation of domestic high quality species is below 3%. Meanwhile, China has over 1.5 million mu (15 mu=1 hectare) of plantations with rubber trees over 35 years old, and about 2.1 million mu of low output plantations with yield below 60 kilograms per mu, both of which should have been renewed. Besides, there are over 1.5 million mu of young rubber plantations facing prolonged non-production period due to insufficient investment. All of these mean that China still have a long way to make the best utilization of the limited resources [1] . Natural rubber tree has a 7-to-8-year of pre-tapping period before it can be tapped though its tapping period can be 25 to 30 years, so the quality of species and seedlings has a long lasting impact—low quality species or seedlings will lead to long-term losses. Hence, the authors aim to find out which natural rubber specie (species) is suitable for cultivation in Hainan by selecting China-bred Reyan7-33-97, Haiken1, Dafeng95, Yunyan77-2, and Yunyan77-4 for research. Natural Rubber Species to Be Optimized The parameters of the five natural rubber species (Reyan7-33-97, Haiken1, Dafeng95, Yunyan77-2, and Yunyan77-4) are as follows (as shown in Table 1).

Vague Adaptive Optimization Based Research on Hainan Favorable Natural Rubber Species