Effects of Acid Stress on the Germination and Embryo Growth of Zoysia japonica Seed

The buffer solutions of C6H8O7·H2O and C6H5Na3O7·2H2O with the different pH were used for acid stress to measure and analyse the germinality and the growth of radical and plumule of Zoysia japonica seeds.The results showed that the seed germination percentage,germination energy,vigor index and length of radical and plumule were lower and the mean germination time was longer than that of CK extreme markedly,respectively.But the germination percentage,germination energy,vigor index and length of plumule markedly or extreme markedly increased with the falling of pH,respectively.Those contrary results indicated that the poison effect and osmosis intimidation of Na+ in the buffer solutions primarily affected the seeds of Zoysia japonica and the effect of solution pH was minor.Not only soil pH but also salt compositions were considered to building Zoysia japonica turf or soil improvement in acid soil.