Nitrogen Nutrition of Containerized Eastern Redcedar. II. Influence of Stock Plant Fertility on Adventitious Rooting of Stem Cuttings

Abstract

<jats:p>Hardwood stem cuttings of eastern redcedar <jats:italic>(Juniperus virginiana</jats:italic> L.), taken from containerized stock plants fertilized weekly with 0, 5, 10, 20, 40, 80, 160, 320, or 640 ppm N, were treated with 7500 ppm IBA and placed under intermittent mist for 12 weeks. Foliar starch and sucrose concentrations within cuttings at time of excision were significantly correlated with percent rooting and root length, respectively. Of the mineral nutrients analyzed (N, P, K, Ca, Mg, Mn, and B), only B and K were significantly correlated with rooting response. A threshold N level (20 ppm), applied weekly, maximized rooting; higher concentrations decreased response. Although N fertilization of stock plants affected adventitious rooting, there were no significant correlations between foliar N levels and measures of rooting response. Chemical name used: 1 <jats:italic>H-</jats:italic> indole-3-butyric acid (IBA).</jats:p>

Changes in Cutting Composition during Early Stages of Adventitious Rooting of Miniature Rose Altered by Inoculation with Arbuscular Mycorrhizal Fungi

“…The concentrations and contents of metabolic reserves in cuttings have been related to rooting ability (Druege et al, 2000;Haissig, 1984;Henry et al, 1992). In chrysanthemum [Dendranthema ×grandifl orum (Ramat.)…”

Seasonal variation in sprouting of GF677 peach × almond(Prunus persica × Prunus aygdalus)hybrid root cuttings

“…According to Henry et al (1992) boron (B) and K were significantly correlated with rooting response of hardwood stem cuttings of Juniperus virginiana. Similarly, Rowe etal.…”

Quantity and Quality of Cuttings as Influenced by Stock Plant Nutrition of Herbaceous Perennials

“…Hardy herbaceous perennials have a slower growth rate than vegetative annuals but faster than conifers; therefore, the optimum N rate may lie in between.Druege et al (2000) established that increasing fertilizer N rate as applied to stock plants increased foliar N in cuttings for chrysanthemum (Dendranthema ·grandiflorum), which in turn positively correlated to the number and length of adventitious roots (rooting percentage was not measured). However, little correlation existed between stock plant foliar N and rooting responses measured (percent, count, length, dry weight) in eastern redcedar (Henry et al, 1992). Manipulation of N rate of stock plants may not be the only way to impact rooting of the cuttings using fertility.…”

“…Discussions with propagators at a major perennial liner nursery guided our selection of four particularly problematic species. Nutrient management of stock plants has been shown to influence some or all of these propagation issues in woody plants Henry et al, 1992;Raymer et al, 2008;Rowe et al, 1999), herbaceous annuals (Gibson, 2003), and potted flowering plants (Druege et al, 2000;Ganmore-Neumann and Hagiladi, 1992). Little information is available on stock plant nutrient management of hardy, herbaceous landscape perennials.Gibson and Cerveny (2005) noted stock plants should be maintained with a fertilization program that will yield cuttings with sufficient nutrient reserves until rooting occurs.…”

“…Increasing stock plant nitrogen levels had a negative impact on rooting percentage and adventitious root development of cuttings of loblolly pine [Pinus taeda (Rowe et al, 1999)]. When a range of N rates (10 to 640 mgÁL -1 N) was applied to eastern redcedar (Juniperus virginiana) stock plants, rooting response was optimized at the relatively low rate of 20 mgÁL -1 N; subsequent increases in N rate caused root counts and dry weight of rooted cuttings to decline (Henry et al, 1992). Alternatively, Gibson's (2003) work with vegetative annuals including 'Grenada' new guinea impatiens (Impatiens ·hawkeri) and 'Purple Fan' scaevola (Scaevola aemula) found the highest rate of N applied to stock plants (300 mgÁL -1 N, from a range of 100 to 300 mgÁL -1 N) produced the most cuttings with the best rooting performance.…”