不同栽培基质对牛角瓜容器苗生长的影响

Effects on Growth of Container Seedling of Calotropis gigantean in Different Cultivation Substrates

采用{4,3}单形重心混料试验设计,以生物量、根冠比和根系为主要分析指标建立回归方程,参考地上部分生长指标,分析泥炭、蛭石、珍珠岩和红壤4种基质对牛角瓜容器苗生长和根系发育的影响。结果表明:采用不同基质配比对容器苗生长和根系发育具有显著影响,不同基质对牛角瓜容器苗苗高、地径、总干质量和根表面积的影响规律不同,影响力大小顺序为泥炭>蛭石>红壤>珍珠岩;采用V(泥炭)∶V(蛭石)=0.2∶0.8育苗基质配比培育的容器苗,总体水平优于其他基质配比,是较为理想的配比组合,建议在生产上推广应用。

The influences on the growth and root system development of container seedlings of Calotropis gigantea in four different substrates （ peat, vermiculite, perlite and red loam） were studied with the t 4, 3 t simplex entered mixture design. This study was mainly analyzed based on the regression equation with the index of biomass, root-shoot ratio and root, growth index above ground as a reference. The results showed that the growth and root system development of container seedlings were significantly affected by the different substrate proportions. The influence rules of different mediums on the height, ground diameter, total dry weigh and root surface area of the container seedling were different, and the influence degree presented as the order ： peat 〉 vermiculite 〉 red loam 〉 perlite. The growth of container seedlings cultivated in the No. 3 treatments （ V （peat） ： V （vermiculite） = 0. 2 ： 0. 8） was considered as the better one than that in the other substrate proportions. Therefore, the No. 3 nursery substrate was the ideal collocation for Calotropis gigantea and recommended for practical production.