Effect of Sodium Carbonate and 6-BA Compound Treatment on Seed Germination of Zanthoxylum armatum DC.
The Zanthoxylum armatum DC.,an important economic crop,has very low germination rates for its seeds under natural conditions.Researching technical measures to improve the germination of Zanthoxylum armatum DC.seeds will provide a crucial basis for its promotion and application.This experiment used Zan-thoxylum armatum DC.seeds from Zigong City,Sichuan Province,as the experimental material.Sodium car-bonate degreasing was applied at a concentration of 2.5%with soaking time gradients of 6 h,12 h,24 h,and 48 h;the gradients for 6-benzylaminopurine(6-BA)plant hormone concentration were 200,400,600,and 800 mg/L,along with soaking time gradients of 12 h,24 h,36 h,and 48 h.Through orthogonal experimental design,treatments were applied,and the effects of different treatments on nine germination indicators of Zan-thoxylum armatum DC.seeds,including germination rate,germination vigor,germination index,vigor index,latency to germination,duration of germination,dry weight of shoots,dry weight of roots,and substance trans-formation rate,were measured and calculated.The results showed that among the 16 treatment groups,the 8 th group treatment(soaking in 2.5%sodium carbonate for 12 h,and 600 mg/L 6-BA for 36 h)exhibited the best overall performance.It significantly enhanced the germination rate,germination vigor,germination index,vigor index,and substance transformation rate of Zanthoxylum armatum DC.seeds by 4 times,5.6 times,8 times,4.2 times,and 1.1 times,respectively,compared to the control group.The latency to germination,dry weight of shoots,and dry weight of roots were increased by 1.58 times,1.45 times,and 1.33 times,re-spectively,compared to the control.Considering all factors,it was concluded that a 12-hours treatment with 2.5%sodium carbonate degreasing,followed by a 36-hours soak in 600 mg/L 6-BA,is most conducive to the germination of Zanthoxylum armatum DC.seeds.
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