不同基质对多穗石柯扦插生根的影响

为了筛选适宜的多穗石柯(Lithocarpus polystachyus)扦插基质，以半木质化枝条为插穗，选取5种原料(园土、黄心土、泥炭土、河沙、椰糠)设置8个基质配方，并对各基质容重、总孔隙度、pH、电导率进行测定，探讨不同基质对多穗石柯扦插成活率、生根数量及根系长度的影响。结果表明，不同配方基质的理化性质不同，多穗石柯扦插成活率、根系数量和根系长度具有显著性差异；成活率、根系数量和根系长度与基质的理化性质存在显著相关，总孔隙度大的基质不利于多穗石柯扦插成活和根系生长，pH和电导率较低的基质中多穗石柯扦插成活率较高；基质园土:黄心土:河沙(1:1:1)最适宜多穗石柯扦插繁殖，扦插成活率最高，为86.75%，其次是基质黄心土:河沙(2:1)。

Effects of Different Substrates on Rooting of Lithocarpus polystachyus Cuttings

In order to screen out the suitable cutting medium of Lithocarpus polystachyus, the semi lignified branches were used as cuttings. And five materials (garden soil, yellow heart soil, peat soil, river sand and coconut bran) were select to set up 8 matrix formulations, and the bulk density, total porosity, pH and electrical conductivity of each matrix were measured to explore the effects of different substrates on the cutting survival rate, root number and root length of L. polystachyus. The results showed that the physical and chemical properties of different media were different, and there were significant differences in the survival rate, root number and root length. The survival rate, root number and root length were significantly correlated with the physicochemical properties of the substrate. The substrate with high total porosity was not conducive to the survival and root growth of L. polystachyus, while the substrate with low pH value and electrical conductivity had higher survival rate; garden soil: yellow heart soil: river sand (1:1:1) was the most suitable medium for cutting propagation, and the cutting survival rate was the highest (86.75%), followed by yellow heart soil: river sand (2:1).