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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 growth parameters, photosynthesis and chlorophyll content of tea tree cutting seedlings cultured under different water content were studied. The results showed that the biomass of tea seedlings was the largest at the substrate moisture content of 80% -100%, and the leaf area ratio (LAR), specific leaf area (SLA), rooting rate and specific root length (SRL) The root biomass ratio (RMR) decreased with the increase of substrate moisture content. The maximum photosynthetic rate (Pnmax) decreased with the increase of substrate moisture content, and reached the maximum at 70% -100% water treatment. The content of chlorophyll With the increase of substrate water content, chlorophyll a / b value decreased with the increase of substrate water content. Therefore, proper reduction of substrate moisture during seedling emergence after rooting is beneficial to seedling morphogenesis and photosynthetic capacity of tea seedlings.