Effect of different soak treatments on breaking seed dormancy in soil seed bank from different degraded grasslands | 不同浸泡处理对破除那曲不同退化草甸草地土壤种子库种子休眠的影响研究
2011
Wei Xuehong, Tibet Agriculture and Animal Husbandry College, Linzhi (China), Collage of Plant Science and Technology | Gesang Zhuoma, Tibet Agriculture and Animal Husbandry College, Linzhi (China), Collage of Plant Science and Technology
[Objective] The aim was to study the effect of different soak treatments on breaking seed dormancy in soil seed bank from different degraded grasslands. [Method] Different concentrations of H2SO4, GA3 and KNO3 were used for soaking the seeds in the soil seed bank from different degraded grasslands, and the germination number of seeds was detected. [Result] When the seeds from soil seed bank were soaked with 60%, 70%, 80% and 90% H2SO4, the germination number of seeds was 0, indicating that the germination of seeds was inhibited; when the seeds were soaked with GA3, the germination number of seeds increased with the concentration of GA3 increasing. When the concentration of GA3 increased to 0.10%, the germination of seeds was inhibited; when the seeds were soaked with 0.2% KNO3, the germination number of seeds was greater than the blank control. [Conclusion] The number of remaining seeds was more in the soil seed banks collected from moderately degraded grassland and heavily degraded grassland; while the number of remaining seeds was small in the soil seed banks collected from lightly degraded grassland and extremely degraded grassland.
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