不同基质配比对短叶对齿藓植物生长的影响

Effects of different substrate compositions and concentrations on the growth of Didymodon tectorus

【目的】对齿藓属(Didymodon)作为典型的耐旱藓类植物,是沙漠、沙地和黄土丘陵区生物结皮的优势植物。探究不同配比基质对短叶对齿藓(D.tectorus)生长的影响,为短叶对齿藓的快速繁殖提供理论依据。【方法】以短叶对齿藓为试验材料,选取泥炭土、珍珠岩、蛭石3种材料为培养基质,通过测定分析短叶对齿藓的盖度、密度及叶绿素含量的变化,研究不同配比基质对短叶对齿藓植物生长的影响。【结果】不同配比基质对短叶对齿藓的盖度、密度等均产生不同的影响。在泥炭土与蛭石体积比2∶1基质处理下,短叶对齿藓盖度、植株密度达到最大(盖度为70.67%,植株密度为12.2株/cm^(2)),并且该处理下测定的叶绿素含量最高,为2.157 mg/g。【结论】综合分析不同配比基质处理下短叶对齿藓的生长指标和生理指标,泥炭土与蛭石体积比2∶1基质处理最有助于短叶对齿藓的生长,该基质配比可适用于短叶对齿藓的快速繁殖。

【Objective】Didymodon tectorus is a typical drought-tolerant moss species and a dominant plant in biological soil crusts in deserts,sandy areas,and loess hilly regions.This study aims to investigate the effects of different substrate proportions on the growth of D.tectorus and provide a scientific basis for the rapid propagation of D.tectorus.【Method】D.tectorus was selected as the experimental material,and three materials,including peat soil,perlite and vermiculite,were chosen as substrate components.The coverage,density and chlorophyll content of D.tectorus were measured to study the impact of different substrate proportions on its growth.【Result】Different substrate proportions had varions effects on the coverage and density of D.tectorus.The substrate with a volume ratio of 2∶1 of peat soil to vermiculite showed the highest coverage(70.67%)and density(12.2 plants/cm^(2))of D.tectorus.Additionally,this substrate proportion exhibited the highest chlorophyll content(2.157 mg/g).【Conclution】Through comprehensive analysis of the growth and physiological indicators of D.tectorus under different substrate proportions,the 2∶1 volume ratio of peat soil to vermiculite was found to be best for its growth.This substrate proportion can be effectively applied for the rapid propagation of D.tectorus.