Search

The purpose of the study was to establish the optimal type of cuttings for the technology of root propagation of Viburnum opulus. The cuttings were harvested from native Viburnum opulus mother plants under the conditions of the nebulizing installation of the winter garden of the «Podillia» botanical garden of the Vinnytsia National Agrarian University. According to the research results, it was established that the rooting and further development of rooted green Viburnum opulus cuttings of the Velikoplidna variety depends on the type of cutting. Analyzing the influence of the type of cutting on the rooting of cuttings of the Velikoplidna variety in the investigated time of cutting, it should be noted the high rooting of cuttings in the variant with three nodes. A gradual decrease in the number of nodes led to a significant decrease in the rooting of green cuttings. Green cuttings of the Velikoplidna variety harvested during the period of mass flowering from the basal part of the shoot with three nodes were characterized by significantly higher rooting, number and length of the root system compared to cuttings harvested from the medial and apical parts. Green cuttings of the Velikoplidna variety harvested during the period of intensive growth of shoots from the medial part of the shoot with three nodes were characterized by significantly higher rooting, number and length of the root system compared to cuttings harvested from the basal and apical parts. Green cuttings of the Velikoplidna variety harvested during the period of slow growth of shoots from the apical part of the shoot with three nodes were characterized by significantly higher rooting, number and length of the root system compared to cuttings harvested from the basal and medial parts.

The purpose of the study was to establish the optimal type of cuttings for the technology of root propagation of Viburnum opulus. The cuttings were harvested from native Viburnum opulus mother plants under the conditions of the nebulizing installation of the winter garden of the Podillia botanical garden of the Vinnytsia National Agrarian University. According to the research results, it was established that the rooting and further development of rooted green Viburnum opulus cuttings of the Velikoplidna variety depends on the type of cutting. Analyzing the influence of the type of cutting on the rooting of cuttings of the Velikoplidna variety in the investigated time of cutting, it should be noted the high rooting of cuttings in the variant with three nodes. A gradual decrease in the number of nodes led to a significant decrease in the rooting of green cuttings. Green cuttings of the Velikoplidna variety harvested during the period of mass flowering from the basal part of the shoot with three nodes were characterized by significantly higher rooting, number and length of the root system compared to cuttings harvested from the medial and apical parts. Green cuttings of the Velikoplidna variety harvested during the period of intensive growth of shoots from the medial part of the shoot with three nodes were characterized by significantly higher rooting, number and length of the root system compared to cuttings harvested from the basal and apical parts. Green cuttings of the Velikoplidna variety harvested during the period of slow growth of shoots from the apical part of the shoot with three nodes were characterized by significantly higher rooting, number and length of the root system compared to cuttings harvested from the basal and medial parts. [ABSTRACT FROM AUTHOR]

O objetivo desse trabalho foi avaliar os efeitos da aplicação do zinco (Zn), boro (B) e ácido indolbutírico (AIB) no enraizamento de estacas de Platanus acerifolia Ait. Os tratamentos consistiram do condicionamento das estacas, coletadas em quatro épocas ao longo do ano e representando diferentes tipos fisiológicos, com: sulfato e cloreto de zinco (0, 2,5, 5, 10, 20 e 40mg l-1 Zn), ácido bórico (0, 50, 100, 150, 200 e 250mg l-1 H3BO3) e ácido indolbutírico (0, 20 e 40mg l-1 AIB), através de solução aquosa, pela imersão de 3cm da base da estaca, com duas lesões laterais de 2cm, por 24 horas. A estaquia foi feita em vasos contendo como substrato uma mistura de areia média e casca de arroz carbonizada (1:1, v/v), ambas lavadas. O experimento foi conduzido por 110 dias em casa de vegetação com aspersão intermitente. No encerramento do experimento, avaliaram-se os seguintes parâmetros: comprimento e número de raízes primárias por estaca, máteria seca de raízes por estaca e percentagem de enraizamento. A aplicação isolada de Zn e B não influencia o enraizamento das estacas. O condicionamento de estacas de ramos "do ano" basais finas com AIB afeta, negativamente, o percentual de enraizamento e, positivamente, o número de raízes por estaca.The aim of this work was to evaluate the effects of zinc (Zn), boron (B), and indolbutiric acid (IBA) on rooting of Platanus acerifolia Ait. cuttings. The treatments of the cuttings, which were collected at four different times during the year and representing four physiological types of cuttings, were: zinc sulphate and chloride (0, 2,5, 5, 10, 20, and 40mg l-1 Zn), boric acid (0, 50, 100, 150, 200, and 250mg l-1 H3BO3), and indolbutiric acid (0, 20, and 40mg l-1 IBA). The treatments with B, Zn and IBA were done through submersion of 3cm of the cutting basis, during 24 hours, in an aqueous solution. The cuttings were rooted in pots containing as substrate a mixture of medium sand + carbonised rice husk, 1:1 v/v, both washed. The experiment was conducted during 110 days under intermittent artificial mist conditions. The evaluated parameters were: length and number of primary adventitious roots, dry weight of adventitious roots, and percentage of rooting. The results show that Zn and B have no influence on the rooting, and the addition of IBA on thin basal semi-herbaceous cuttings reduces the percentage of rooting and increase the number of roots.