贮藏时间与覆盖物对云山青冈种子萌发的影响

Effects of Storage Time and Mulch on Seed Germinati on of Quercus sessilifolia

  • 摘要: 于2021—2022年,在福建省上杭白砂国有林场,开展云山青冈种子不同贮藏时间(分别为30、60、90、120 d)、不同覆盖物(分别为稻草、黄土、阔叶凋落物、松针)对种子萌发特性的影响研究。结果表明:不同贮藏时间对云山青冈种子萌发特性影响存在差异,其中,贮藏时间为120 d时,云山青冈种子胚根长度最大,为11.30 mm;贮藏时间为90 d时发芽率最高,为90%。不同覆盖物处理下,云山青冈种子萌发特性存在差异,与无覆盖物(对照)相比,稻草覆盖明显缩短种子持续发芽时间,降低了种子发芽率、发芽指数;而黄土覆盖不仅降低了种子持续发芽时间,而且种子发芽率、发芽势与发芽指数增加最大。综合结果表明,不同贮藏时间与覆盖物对云山青冈种子萌发特性产生明显影响,云山青冈种子最佳贮藏时间为90 d,播种后选择黄土进行覆盖能够提高种子发芽性状,促进云山青冈种子萌发。研究结果可为云山青冈育苗提供参考。

     

    Abstract: The effects of different storage time and mulch on the germination characteristics of Quercus sessilifolia seeds were studied to provide scientific basis for the seedling raising technology of Q.sessilifolia.The effects of different storage time (30,60,90,120 d) and different mulch (straw,loess,broad-leaved litter,pine needles) on seed germination characteristics of Q.sessilifolia were studied in Baisha Town State-owned Forest Farm,Shanghang County,Fujian Province from 2021 to 2022.The results showed that different storage time had different effects on seed germination characteristics.When the storage time was 120 days,the maximum radicle length was 11.30 mm.The highest germination rate was 90% when the storage time was 90 days.There were differences in seed germination characteristics under different mulching treatments.Compared with no mulching (control),straw mulching significantly shortened the continuous germination time of seeds,reduced the germination rate and germination index of seeds,while loess mulching not only reduced the continuous germination time of seeds,but also increased the germination rate,germination potential and germination index of seeds.The comprehensive results showed that different storage time and coverings had significant effects on seed germination characteristics of Q.sessilifolia.The best storage time of seeds was 90 days.The selection of loess for covering after sowing could improve seed germination characteristics and promote seed germination of Q.sessilifolia.

     

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