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通过设计7个钙磷浓度室内水培模拟试验,进行不同钙磷胁迫杉木叶绿素及其荧光参数的比较,探讨钙对低磷环境杉木抗逆性的影响。结果表明:随着低磷胁迫时间的推移,不同钙浓度处理杉木叶绿素含量变化明显,与正常供养CK处理相比,钙对缓解低磷逆境杉木叶绿体受伤程度、保持较高光合效率有显著作用,其中钙浓度Ⅳ(2.0 mmol/L)和Ⅴ(1.0 mmol/L)的这种作用尤为明显。无磷无钙Ⅵ处理条件下杉木叶片PSⅡ反应中心破坏最为严重,且受光抑制程度最大,处理Ⅲ和Ⅳ则较小。施钙可有效缓解低磷胁迫对Fm值的抑制作用。
Seven indoor calcium and phosphorus concentration experiments were conducted to study the effects of calcium on chlorophyll content and fluorescence parameters of Chinese fir under different Ca and P concentrations. The results showed that chlorophyll content of Chinese fir (Cunninghamia lanceolata) Cunninghamia lanceolata (Cunninghamia lanceolata) was significantly different with different Ca2 + concentrations as the time of low P stress increased. Compared with CK, Ca2 + had a significant effect on alleviating the chloroplast injury and maintaining high photosynthetic efficiency of Cunninghamia lanceolata This effect of calcium concentration IV (2.0 mmol / L) and V (1.0 mmol / L) is particularly evident. PS Ⅱ reaction center under the condition of phosphorus-free and calcium-free Ⅵ treatment had the most serious damage, with the largest inhibition of light and the less treatment Ⅲ and Ⅳ. Applying calcium can effectively alleviate the inhibitory effect of phosphorus deficiency on Fm.