Effects of Species,Concentration and Soaking Time of Plant Growth Regulators on Rooting of Polygonum aubertii Cuttings

SHI Jia; YUE Yanling; JING Rong

doi:10.3969/j.issn.1003-4749.2025.02.013

Abstract：To explore the suitable species,concentrations and soaking time of plant growth regulators during the rooting process of Polygonum aubertii cuttings,orthogonal experiments was conducted to study the effects of plant growth regulator species[indole-3-acetic acid(IAA),indolebutyric acid·naphthaleneacetic acid,and rooting powder(ABT)],concentrations(500,1 000 and 1 500 mg/L),and soaking time(10,300 and 1 800 s)on the rooting rate,number of root,root length,longest root length,and rooting index of Polygonum aubertii cuttings.The results showed that the influence order of the three factors on the rooting rate of Polygonum aubertii cuttings was plant growth regulator concentration>plant growth regulator species>soaking time;The influence order of the three factors on the number of root of Polygonum aubertii cuttings was plant growth regulator concentration>soaking time>plant growth regulator species;The influence order of the three factors on the root length of Polygonum aubertii cuttings was plant growth regulator species>plant growth regulator concentration>soaking time;The influence order of the three factors on the longest root length of Polygonum aubertii cuttings was plant growth regulator type>plant growth regulator concentration>soaking time;The influence order of the three factors on the rooting index of Polygonum aubertii cuttings was plant growth regulator concentration>plant growth regulator species>soaking time.The optimal combination for root length of Polygonum aubertii cuttings was 1 000 mg/L IAA soaking for 1 800 s,while the optimal combinations for rooting rate,number of root,longest root length and rooting index were all 1 000 mg/L IAA soaking for 10 s.Overall,1 000 mg/L IAA soaking for 10 s is the best combination for the rooting of Polygonum aubertii cuttings.