CAJ | 학술논문

在基质栽培和营养液栽培条件下,对侧柏、刺槐和白榆幼苗主根分别进行切除1/3,1/2和不切除试验,以研究不同切根比例对一级侧根数量、一级侧根总长度以及一级侧根发生位置的影响.结果表明,对苗木进行主根切断,抑制了主根的生长,促进了一级侧根的发生,使切根处理后的幼苗在一级侧根的数量和总长度上均大于全根苗.一级侧根发生的数量以及生长量与主根切断比例有关,1/3切根的增加幅度大于1/2切根处理,说明一级侧根的发生随着主根伤害程度的增加而有所减小.一级侧根的发生位置比全根苗更接近于根基.3树种全根苗一级侧根的发生位置主要集中分布在2～5 cm,而1/3切根苗的一级侧根主要分布在2-4 cm,1/2切根苗的一级侧根主要分布在2～3 cm.
재기질재배화영양액재배조건하,대측백、자괴화백유유묘주근분별진행절제1/3,1/2화불절제시험,이연구불동절근비례대일급측근수량、일급측근총장도이급일급측근발생위치적영향.결과표명,대묘목진행주근절단,억제료주근적생장,촉진료일급측근적발생,사절근처리후적유묘재일급측근적수량화총장도상균대우전근묘.일급측근발생적수량이급생장량여주근절단비례유관,1/3절근적증가폭도대우1/2절근처리,설명일급측근적발생수착주근상해정도적증가이유소감소.일급측근적발생위치비전근묘경접근우근기.3수충전근묘일급측근적발생위치주요집중분포재2～5 cm,이1/3절근묘적일급측근주요분포재2-4 cm,1/2절근묘적일급측근주요분포재2～3 cm.
Under the substrate culture and solution culture conditions, taproots of Platycladus orientalis, Robinia pseudoacacia and Ulmus pumila were cut off 1/3 and 1/2, the lateral root number, lateral root total length and the emerging position of seedlings with different root-cutting ratio were investigated compared to controls with intact roots.The results showed that root-cutting prohibited taproot growth, promoted lateral root development, and consequently, seedlings after root-cutting had a greater lateral root number and total length than the controls.The degree of lateral root development had a significant relationship with root-cutting ratio, and 1/3 root-cutting developed more lateral roots than 1/2 rootcutting, indicating that the stimulative effect of root-cutting is diminished with the increasing of rootcutting ratio.The lateral root of root-cut seedlings emerged closer to rootneck than the controls.The lateral root emerging position of seedling with intact roots distributed maily in 2-5 cm, and in contrast, 1/3 root-cutting in 2～4 cm and 1/2 root-cutting in 2～3 cm.