论文部分内容阅读
研究在不同光照条件下(光强分别为自然光的8%、15%、35%、42%、50%及75%)生长的茶树扦插苗的光合作用,叶绿素含量和生长情况。结果表明:茶树扦插苗的光合速率(Pn)、最大光合速率(Pnmax)、表观量子效率(AQY)均在自然光强的75%时达到最大值;叶绿素含量随光强的增加而降低,叶绿素a/b则随光强增加而增加;新生物量与最大光合速率一致,在自然光强的75%时达到最大值;其植株生根率、出现愈伤组织的比率、根条比及根生物量比(RMR)随光强的增加而增加,死亡率、SLA及LAR随光强的增加而降低。根据实验结果,适当提高大棚透光率及在阴天对大棚中的茶苗进行加光处理,对快速繁育茶苗有利。
The photosynthesis, chlorophyll content and growth of tea plantlets were studied under different light conditions (light intensity was 8%, 15%, 35%, 42%, 50% and 75% respectively). The results showed that the photosynthetic rate (Pn), maximum photosynthetic rate (Pnmax) and apparent quantum yield (AQY) of the cuttage seedlings all reached the maximum at 75% of the natural light intensity. The content of chlorophyll decreased with the increase of light intensity, Chlorophyll a / b increased with the increase of light intensity. The new biomass was consistent with the maximum photosynthetic rate, reaching the maximum at 75% of natural light intensity. The rooting rate, callus emergence ratio, root ratio and root The biomass ratio (RMR) increased with the increase of light intensity. The mortality, SLA and LAR decreased with the increase of light intensity. According to the experimental results, it is beneficial to rapidly propagate the tea seedlings by properly increasing the light transmittance of the greenhouses and adding light to the tea seedlings in the greenhouses.