研究了在不同含水率基质下培养的茶树扦插苗的生长参数、光合作用和叶绿素含量。结果表明：茶苗的新生物量在基质含水率80%~100%时最大,叶面积比（LAR）、比叶面积（SLA）、生根率及比根长（SRL）随基质含水率的增加而增加,根生物量比（RMR）随基质含水率的增加而降低;最大光合速率（Pnmax）随基质含水率的增加而降低,在70%~100%水处理时最大;叶绿素的含量基本上随基质含水率的增加而增加,而叶绿素a/b的值则随基质含水率的增加而降低。因此,在出根后的育苗期间适当降低基质含水率有利于幼苗的形态建成和提高茶苗的光合能力。

The photosynthesis, chlorophyll content and the growth traits of the clonal tea seedling grown under various substrates with different water content under the greenhouse were compared. The new biomass reaching their maximum values in the substrate with 80%~100% relative substrate water content, root mass ratio (RMR) decreased with the increase of water content of substrate, while the content of chlorophyll, specific leaf area (SLA), leaf area ratio (LAR), root emerging rate of the plant and specific root length (SRL) increased as the water content of substrate increased. The maximum photosynthetic rate (Pnmax) and new biomass increased as the water content of substrate increased, reaching their maximum values at 70%~100% water content of substrate. Content of chlorophyll increased with the rise of relative water content of substrate, while the ratio of chlorophyll a/b decreased with the substrate water content of substrate. Lower substrate water content can expedite the growth of tea seedling after rootage.