Growth and quality of Handroanthus heptaphyllus (Vell.) Mattos. seedlings as a function of controlled release fertilizer doses

Abstract Stem cuttings of Leyland cypress [x Cupressocyparis leylandii (A.B. Jacks. & Dallim.) Dallim. & A.B. Jacks], were rooted to determine the effect of A) date of collection, rooting substrate, and mist frequency, B) auxin formulation and concentration, C) rooting substrate, D) substrate fertility, and E) type of cutting and auxin concentration. Results were best for misting intervals of 5 to 7 min during the day, but 10 min was also adequate. Rooting was comparable for softwood cuttings collected in late May or late June. Powder and liquid auxin formulations, which both contained indolebutyric acid (IBA), yielded similar results. Cuttings that were more lignified (light tan color) at the bases benefited the most from higher concentrations [≈ 8000 ppm (0.8%)] of IBA in talc, whereas less mature cuttings (green at the bases) rooted in highest percentages with lower concentrations [≈ 3000 ppm (0.3%)]. Rooting was similar in substrates with a peat:perlite ratio (v/v) of 1:1, 1:2, or 1:4, whereas results were less satisfactory in 100% perlite. Controlled release fertilizer [1.8 kg/m3 (4 lb/yd3)] in the rooting substrate did not affect rooting percent, but greatly increased root mass and quality of rooted cuttings. Doubling the rate resulted in little additional improvement. Rooting was comparable for vigorous side shoots (1st-order laterals) and tips from vigorous upright branches (primary axes) of similar maturity.

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Use of Species-specific Controlled-release Fertilizer Rates to Manage Growth and Quality of Container Nursery Crops

HortTechnology ◽

10.21273/horttech.25.3.370 ◽

2015 ◽

Vol 25 (3) ◽

pp. 370-379 ◽

Cited By ~ 1

Author(s):

Mary Jane Clark ◽

Youbin Zheng

Keyword(s):

Controlled Release ◽

Growth Index ◽

Dry Weight ◽

Temperate Climate ◽

Controlled Release Fertilizer ◽

Shoot Dry Weight ◽

Application Rates ◽

Nursery Crops ◽

Species Specific

The objective of this study was to determine the optimal controlled-release fertilizer (CRF) application rates or ranges for the production of five 2-gal nursery crops. Plants were evaluated following fertilization with 19N–2.6P–10.8K plus minors, 8–9 month CRF incorporated at 0.15, 0.45, 0.75, 1.05, 1.35, and 1.65 kg·m−3 nitrogen (N). The five crops tested were bigleaf hydrangea (Hydrangea macrophylla), ‘Green Velvet’ boxwood (Buxus ×), ‘Magic Carpet’ spirea (Spiraea japonica), ‘Palace Purple’ coral bells (Heuchera micrantha), and rose of sharon (Hibiscus syriacus). Most plant growth characteristics (i.e., growth index, plant height, leaf area, and shoot dry weight) were greater in high vs. low CRF treatments at the final harvest. Low CRF rates negatively impacted overall appearance and marketability. The species-specific CRF range recommendations were 1.05 to 1.35 kg·m−3 N for rose of sharon, 0.75 to 1.05 kg·m−3 N for ‘Magic Carpet’ spirea, and 0.75 to 1.35 kg·m−3 N for bigleaf hydrangea and ‘Green Velvet’ boxwood, whereas the recommended CRF rate for ‘Palace Purple’ coral bells was 0.75 kg·m−3 N. Overall, species-specific CRF application rates can be used to manage growth and quality of containerized nursery crops during production in a temperate climate.

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INPUTS OPTIMIZATION IN THE SEEDLINGS PRODUCTION OF Corymbia citriodora E Eucalyptus dunnii

FLORESTA ◽

10.5380/rf.v52i1.78100 ◽

2022 ◽

Vol 52 (1) ◽

pp. 103

Author(s):

Claudia Costella ◽

Maristela Machado Araujo ◽

Álavro Luís Pasquetti Berghetti ◽

Suelen Carpenedo Aimi ◽

Marllos Santos de Lima ◽

...

Keyword(s):

Controlled Release ◽

Dry Weight ◽

Growth Potential ◽

Morphological Attributes ◽

Controlled Release Fertilizer ◽

Physiological Variables ◽

Eucalyptus Dunnii ◽

Chlorophyll A And B ◽

Corymbia Citriodora

Corymbia citriodora and Eucalyptus dunnii are species of relevant importance due to the quality of the wood and growth potential in Southern Brazil. Therefore, we aimed to identify containers and doses of controlled-release fertilizer capable of enhancing the morphophysiological quality and growth of these species in the nursery, aiming for the proper management of these inputs. The seedlings were produced in two volumes of containers (50 e 110 cm³), filled with Sphagnum peat-based substrate, mixed with different doses of controlled-release fertilizer (CRF) NPK 15-09-12 (0, 3, 6, 9 e 12 g L-1 of substrates). In addition, the morphological (height, stem diameter, leaf area, dry weight of shoot, root, and total) and physiological (chlorophyll a and b index and quantum yield of the photosystem II) attributes were evaluated. The morphological attributes proved to be suitable indicators of the quality of C. citriodora and E. dunnii seedlings, allowing to recommend the container of 50 cm³ and the doses of 9.0 g L-1 of controlled-release fertilizer for both species. At the same time, the physiological variables evaluated were not responsive to the effect of the treatments.

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Production and Postproduction Performance of Two New Guinea Impatiens Cultivars Grown with Controlled-release Fertilizer and No Leaching

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.121.5.820 ◽

1996 ◽

Vol 121 (5) ◽

pp. 820-825 ◽

Cited By ~ 5

Author(s):

Darren L. Haver ◽

Ursula K. Schuch

Keyword(s):

Controlled Release ◽

New Guinea ◽

Light Level ◽

High Rate ◽

Controlled Release Fertilizer ◽

Light Levels ◽

High Moisture Level ◽

Leaf N Content ◽

New Guinea Impatiens

The objectives of this study were to determine 1) the minimum controlled-release fertilizer (CRF) rate and the lowest constant medium moisture required to produce the highest quality plants and 2) if this production system affected quality of these plants under two postproduction light levels. Two New Guinea impatiens (Impatiens sp. hybrids) `Illusion' and `Blazon' (Lasting Impressions Series) differing in salt tolerance were grown for 42 days with a CRF at three rates (3.3, 6.6, or 9.9 g/pot) and two medium moisture levels (low or high) without leaching. The high moisture level (tension setpoints of 1 to 3 kPa) and 6.6 g of CRF/pot produced optimum biomass. Low medium moisture (tension setpoints of 4 to 6 kPa) reduced leaf area, leaf number, leaf N content, root, stem, and leaf dry masses as CRF rate increased from low to high for `Illusion'. Similar results in `Blazon' were observed as CRF rates increased from 3.3 to 6.6 g. Biomass decreased no further at the high rate of 9.9 g/pot. Biomass increased in both cultivars under high medium moisture when CRF rates increased from 3.3 to 6.6 g. Biomass of `Illusion' decreased at 9.9 g/pot, although no symptoms of salt sensitivity were observed (i.e., leaf tip burn). `Blazon' maintained a similar biomass when amended with 9.9 or 6.6 g CRF/pot, although electrical conductivity (EC) in the medium was 5.9 dS·m-1 in the upper half and 4.1 dS·m-1 in the lower half of the medium at the end of production. Growth of `Illusion' responded more favorably to postproduction light levels that were similar to those of production regardless of treatment imposed during production. Similar biomass responses occurred for `Blazon' regardless of the postproduction light level.

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Effect of Nitrogen Fertilization Rate on Aesthetic Quality of Landscape-grown Vines and Groundcovers

HortTechnology ◽

10.21273/horttech.24.5.604 ◽

2014 ◽

Vol 24 (5) ◽

pp. 604-609 ◽

Cited By ~ 1

Author(s):

Amy L. Shober ◽

Kimberly A. Moore ◽

Gitta S. Hasing ◽

Christine Wiese ◽

Geoffrey C. Denny ◽

...

Keyword(s):

Controlled Release ◽

Fertilization Rate ◽

N Fertilization ◽

N Fertilizer ◽

Aesthetic Quality ◽

Controlled Release Fertilizer ◽

Central Florida ◽

West Central ◽

Quality Response

Research supporting recommendations for fertilizer needs of landscape-grown vines and groundcovers is lacking. The objectives of our study were to (1) evaluate the quality response of selected vine and groundcover species to nitrogen (N) fertilization at five rates and (2) validate the recommended N fertilizer rates (from the initial evaluation) by monitoring quality of additional landscape-grown vine and groundcover species. Three vine species and two groundcover species were planted in west-central Florida into raised beds containing subsoil fill material in a completely randomized design. Plants were fertilized every 6 weeks with a controlled release fertilizer (20N–0P–0K–23S) at an annual N rate of 0, 2, 4, 6, or 12 lb/1000 ft2. Plant aesthetic quality (0–5 scale) was assessed every 6 weeks for 30 weeks after planting. Although quality of some species increased significantly as N rate increased, all plants supplied with at least 4 lb/1000 ft2 per year N fertilizer had acceptable quality ratings of 3 or better. Screening of three additional vines and four additional groundcovers fertilized with controlled release fertilizer (42N–0P–0K) at an annual N rate of 3, 5, or 7 lb/1000 ft2 confirmed that fertilization with 2 to 4 lb/1000 ft2 per year should be adequate to maintain acceptable vines and groundcovers grown in the landscape in west-central Florida.

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Effect of Controlled Release Fertilizer on Growth, Yield and Quality of Bottle gourd (Lagenaria siceraria Mol.) under Prayagraj Agro-climatic Conditions

International Journal of Current Microbiology and Applied Sciences ◽

10.20546/ijcmas.2021.1004.026 ◽

2021 ◽

Vol 10 (4) ◽

pp. 257-262

Author(s):

Jomel Sebastian Samir E. Topno ◽

V. M. Prasad

Keyword(s):

Controlled Release ◽

Growth Yield ◽

Climatic Conditions ◽

Bottle Gourd ◽

Lagenaria Siceraria ◽

Controlled Release Fertilizer ◽

Yield And Quality

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Substrates and controlled-release fertilizations on the quality of eucalyptus cuttings

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v18n11p1124-1129 ◽

2014 ◽

Vol 18 (11) ◽

pp. 1124-1129 ◽

Cited By ~ 8

Author(s):

Richardson B. G. da Silva ◽

Magali R. da Silva ◽

Danilo Simões

Keyword(s):

Controlled Release ◽

Water Retention ◽

Management Strategies ◽

Eucalyptus Grandis ◽

Root Systems ◽

Eucalyptus Urophylla ◽

Controlled Release Fertilizer ◽

Coconut Fibre ◽

Proper Values

To produce cuttings with quality, the most appropriate nutritional management strategies should be sought to reduce wastage of fertilizer, while accounting for the characteristics of each substrate. This study evaluated the effect of substrates and doses of controlled-release fertilizer on the quality of Eucalyptus grandis Hill ex Maiden x Eucalyptus urophylla S. T. Blake cuttings. The substrates consisted of several mixtures: vermiculite+carbonized rice chaff+coconut fibre (1:1:1); vermiculite+coconut fibre (1:1); and vermiculite+carbonized rice chaff (1:1). These mixtures were added to 2, 4, 6 and 8 kg of controlled-release fertilizer per cubic meter of substrate. The substrates that do not support root development and have lower water retention, independently of the dose of controlled-release fertilizer, reduce the quality of the root system. For substrates with proper values of water retention, such as vermiculite+coconut fibre (1:1) and vermiculite+carbonised rice chaff+coconut fibre (1:1:1), the utilization of dose 2 kg of controlled-release fertilizer to each cubic meter is enough to promote cuttings with greater quality of the root systems and proper heights and stem diameters.

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