颗粒粒径对育苗基质孔隙特性的影响研究

Study on Granule Size Effect on the Porosity Property of Substrate

在花卉的基质育苗与生产中，稳定是好的根际环境如水分、氧气、酸碱度等主要决定于基质的理化性状，其中基质的孔隙特性（隙度、孔径分配）直接影响水分和空气的含量，是最重要的物理参数。本试验研究了5种不同颗粒粒径的蛭石对其物理性质、水分常数和孔雀草苗期生长的影响。结果表明。基质总孔隙度在70％～90％，大小孔隙比在1：2左右时均能满足作物苗期生长的要求。为以后的工厂化基质育苗提供了参考依据。

During the substrate nurturance and production of flower, the steady, favorable environment of rhizosphere, which includes water, oxygen, nutrition, pH and microbe, are decided by the physical and chemical characters of substrate. By the reason of the balance between water and air, the porosity property seems to be the most important parameter of substrate quality among these characters. This article tried out the results which the 5 different granule sizes vermiculite affect on the physical characters, water constants and maidenhair. The results showed that the standard range of total porosity was 70%-90% ,and the ratio of non-activated porosity ＋ capillary porosity/aerated porosity was 1：2 or so, which could provide reference basis for the industrial substrate nurturance in the future.