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一、光强与橡胶的生长发育 1.光照强度与胶树光合作用 据华南热带作物研究院试验表明,胶树光合作用强度一般随太阳辐射强度的增加而增加(表一)。但是当光照强度增到30,000勒克斯以后,尽管其强度继续增加,由于CO_2、H_2O和叶绿素含量以及温度环境条件的限制,光合作用强度并不再增加,胶树光合作用达到饱和点。达到光饱和点以后,光合作用强度将保持不变。在自然情况下,当太阳辐射强度增加到一定程度以后,反使光合强度降低,尤其是
First, the light intensity and rubber growth and development 1 light intensity and gum tree photosynthesis According to the South China Institute of Tropical Crops test shows that the gum tree photosynthesis intensity generally increases with the increase of solar radiation intensity (Table 1). However, when the light intensity increased to 30,000 lux, the photosynthesis intensity did not increase due to the limitation of CO 2, H 2 O and chlorophyll content and temperature and environmental conditions, and the photosynthesis of the gum tree reached the saturation point despite the increase of its intensity. After reaching the light saturation point, the photosynthesis intensity will remain unchanged. Under natural conditions, when the solar radiation intensity is increased to a certain extent, the photosynthetic intensity is reduced, especially