Effects of soil adhesive on seed germination and seedling growth of Paspalum wettsteinii under different temperatures

doi:10.11686/cyxb2017393

Abstract

Abstract: In order to explore the optimum conditions for seed germination and seedling growth beneficial to vegetation restoration in areas suffering from soil erosion, this study investigated the effects of temperature and soil adhesive on seed germination and seedling growth of Paspalum wettsteinii. An experiment was carried out using the topsoil from an eroding area in Changting County as substrate with 4 different temperatures (15, 20, 25 and 30 ℃) controlled by an artificial climate incubator and 4 different soil conditions created by different soil adhesive-PAM concentrations (0, 0.5, 1.0 and 2.0 g·L^-1) which were added to the soil. The results showed that the initial seed germination time of P. wettsteinii was advanced from the 10th day to the 3rd day and the terminal seed germination time was advanced from the 26th day to the 9th day after seeding as temperature increased from 15 to 30 ℃. The seed germination rate and germination energy of P. wettsteinii under 20 and 25 ℃ were higher than other temperatures. The germination index, vigor index, seedling growth, and biomass at 20, 25, 30 ℃ were significantly higher than that at 15 ℃. The addition of soil adhesive increased the seed germination and prolonged germination and growth of P. wettsteinii. The seed germination rate, germination energy, germination index and vigor index were increased by adding low concentrations of adhesive (0.5 or 1.0 g·L^-1) to soil, seed germination was restrained by high soil adhesive concentration (2.0 g·L^-1). The results of this research provide a useful scientific reference and technical insight for vegetation restoration using P. wettsteinii.

Key words: Paspalum wettsteinii, soil adhesive, seed germination, biomass, temperature

WANG Yu-zhen, HUANG Xiao, CAI Li-ping, ZHENG Hui-xin, HOU Xiao-long, ZHOU Chui-fan, ZOU Xian-hua. Effects of soil adhesive on seed germination and seedling growth of Paspalum wettsteinii under different temperatures[J]. Acta Prataculturae Sinica, 2018, 27(4): 139-149.

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