【摘要】 通过不同育苗基质对湿地松容器苗生长的影响试验,结果表明,基质中火烧土含量和过磷酸钙含量是影响苗木生长量的主要因子,特别是火烧土,对后期苗木的生长起到关键作用。蛭石因改善了红壤的通气性,利于根系在土壤中呼吸,从而促进植株生长。从不同基质育苗结果得知,基质Ⅰ(火烧土60%、松林表土40%、过磷酸钙5%)育苗效果最为理想,平均地径、平均树高以及生长量的积累均达到最高。基质Ⅰ的平均地径和苗高分别为基质Ⅵ(深层红壤80%、松林表土20%)的1.23倍和1.36倍,是基质Ⅴ(深层红壤60%、松林表土20%、蛭石20%)的1.20倍和1.27倍。基质Ⅰ和基质Ⅱ(火烧土40%、深层红壤20%、松林表土40%)、基质Ⅴ、基质Ⅵ两两之间均存在极显著差异。更多还原

【Abstract】 Effect of different nursery substrates on growth of container-seedling of Pinus massoniana were studied.Result shows that:content of fire soil and calcium superphosphate in substrates which are main factors affect seedling growth,especially the fire soil play a key role in the late growth.The vermiculite help greatly to advance air capacity of red soils and respiration of root system and thus promote botanical growth.Result shows that:the perfect group is substrateⅠ(60% fire soil,40% surface soil of Pinus massoniana and 5% calcium superphosphate) which reaches the optimal nursery effect——average ground diameter,height and growth amount of the breeding seedling are the highest.The average ground diameter and height of substrateⅠwhich is 1.23 and 1.36 times as high as substrateⅥ(80% red soil,20% surface soil of Pinus massoniana)respectively is 1.20 and 1.27 times as high as substrate Ⅴ(60% red soil,20% surface soil of Pinus massoniana,20% vermiculite)respectively;there are significant differences in any two items among substrate Ⅰ,substrateⅡ(40% fire soil,20% red soil and 40% surface soil of Pinus massoniana),substrateⅤand substrateⅥ.更多还原