Abstract:Under the artificial climate incubator, the effects of seed coat and temperature on the germination of Hevea brasiliensis seeds were studied. The results showed that seed coat had significant mechanical inhibition on the water absorption and the germination of H. brasiliensis seeds. The seed germination sped up and germination index increased when removed seed coat, but germination rate significantly decreased from 83.8% to 47.85%, and vigor index from 332.3 to 187.9, respectively. The seed germination delayed obviously and the germination rate reduced under below 15℃. The germination rate, germination index and vigor index of kernel all increased with the elevation of temperature, while those of seeds were up to peak at 20℃(94.7%), 30℃(1.86), and 25℃(374.4), respectively. The coefficient of germination rate increased first, and then decreased. In the rubber cultivation and the construction of rubber plantation, the restrict effect of seed coat on water lose of kernel and non-sensitivity to lower temperature could be utilized to prolong seed storage period, increase germination rate and improve seedling quality.
