不同采集地梭罗草种子萌发特征和幼苗抗旱性研究

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中图分类号：S543.9 文献标识码：A 文章编号：1007-0435（2025）12-4098-1

doi：10.11733/j.issn.1007-0435.2025.12.022

引用格式：，等.不同采集地梭罗草种子萌发特征和幼苗抗旱性研究[J].草地学报，2025，33（12）：4098 -4108 LYU Liang-yu，SHI Jian-jun，CAI Zong-cheng，et al. Study on Seed Germination Characteristics and Seedling DroughtResistanceofKengyiliathoroldiana fromDiffrent Colection Sites[J].ActaAgrestia Sinica，2O25，3（12）： 4098-4108

Study on Seed Germination Characteristics and Seedling Drought Resistance of Kengyilia thoroldiana from Different Collection Sites

LYU Liang-yu， SHI Jian-jun ， CAI Zong-cheng， BAO Shan-cun，GAO Pei，LI Fa-yi， FU Shou-quan，HAN Wen

（1.CollegeofialienceadVeteriaryeQigaiUivesitygingirovce6，ia;tateKeybtoyfSanjangyuanEcologndPateaAgicultureandAnialHusbandrJtlstablishedQghiUniversityiningQighiProvce China;3.KeyLaboratoryofdaptiveManagementoflineGrassandininghaiProvince，XiningQinghaiProvnceO6，Cina）

Abstract：In order to explore the efects of water stress on the seed germination and seedling growth of Kengyilia thoroldiana，this study used seeds of four geographical populations of K☉ ，thoroldiana in Qinghai Province as the research object，and the physiological indexes of seed germination and seedling growth of K .thoroldiana were determined by simulating water stress environment with diferent PEG concentrations. The results showed that the seed germination and seedling growth of K .thoroldiana were inhibited under drought stress. With the increase of drought stress，the seed germination rate，germination index，seedling height and radicle length of K ，thoroldiana decreased continuously. Undermild drought stress （-0.2MPa ， -0.4MPa） ，the germination rate，germination rate，germination index and simplified vigor index were all higher，and the seedlings grew and developed faster. Waterlogging （0，0MPa） or drought （-0.8MPa ， -1.0MPa ， -1.2MPa ） inhibited seed germination and seedling growth.Corelation analysis showed that except for malondialdehyde， theother14 seed germination and seedling growth related indexes were positively correlated.The evaluation of

Fuzzy membership function analysis showed that the order of seed germination ability of K ，thoroldianafrom strong to weak was Tanggula Mountain Town > Qumahe Township > Huashixia Township > Shanglaxiu Township.

Key words：Kengyilia thoroldiana; Osmotic stress; Germination index; Growth indicators;Fuzzy membership function

近年来，全球气候暖干化和人类活动等因素综合作用造成青藏高原高寒荒漠草原面积呈持续增加趋势[1]。（剩余16933字）