scholarly journals Effect of vermicompost on the growth and health of Impatiens wallerana

Phyton ◽  
2006 ◽  
Vol 75 (1) ◽  
pp. 115-123 ◽  
Author(s):  
Asciutto K ◽  
MC Rivera ◽  
ER Wright ◽  
D Morisigue ◽  
MV L髉ez
Keyword(s):  
Impatiens Wallerana

Incorporation de résidus organiques dans un substrat tourbeux pour la production d'impatiens et de géraniums

1998 ◽  
Vol 78 (1) ◽  
pp. 131-138
Author(s):  
Fabienne Gauthier ◽  
Serge Gagnon ◽  
Blanche Dansereau
Keyword(s):  
Key Words ◽  
Growth Parameters ◽  
Growth Index ◽  
Visual Quality ◽  
Dry Weight ◽  
Peat Moss ◽  
Paper Sludge ◽  
Organic Residues ◽  
Top Dry Weight ◽  
Impatiens Wallerana

During winter 1994 and spring-summer 1994, seedlings of Impatiens wallerana 'Accent Coral' and Pelargonium × hortorum 'Orbit Hot Pink' were grown in a commercial substrate (PRO-MIX 'BX') or in one of 24 substrates composed of perlite (35% by volume), peat moss and of six organic residues (composted water-treated sludge, forestry compost, fresh or composted used peat extracted by biofilter during treatment of municipal water, and fresh or composted paper sludge). The purpose of the study was to determine the maximal proportion of these residues to be incorporated into a peat substrate to obtain quality plants. Growth parameters (growth index, top dry weight, and visual quality) generally decreased with increasing proportion (5, 10, 25 or 40% per volume). During the winter experiment, growth of control plants was superior to growth of plants grown in substrates composed of residues. An incorporated proportion of 25% per volume was shown to be maximal for the production of impatiens and geraniums. Key words: Impatiens wallerana, Pelargonium × hortorum, water treated sludge, composted wastes, peat moss, subirrigation

scholarly journals Growth of Bedding Plants in Substrates Amended with Compost and Fertilized with Three Different Release Rates of a Controlled-release Fertilizer Product

2004 ◽  
Vol 14 (4) ◽  
pp. 474-478 ◽  
Author(s):  
Kimberly K. Moore
Keyword(s):  
Controlled Release ◽  
Dry Weight ◽  
Application Rate ◽  
Release Rates ◽  
Controlled Release Fertilizer ◽  
Bedding Plants ◽  
Shoot Dry Weight ◽  
Standard Application ◽  
Impatiens Wallerana

Growth of `Aladdin Peach Morn' petunia (Petunia × hybrida) and `Accent White' impatiens (Impatiens wallerana) was compared in substrates containing 0%, 30%, 60%, or 100% compost made from biosolids and yard trimmings and fertilized with Nutricote Total 13-13-13 (13N-5.7P-10.8K) Types 70, 100, and 140 incorporated at rates of 0.5x, 1x, 2x, or 3x (x = standard application rate for a medium-feeding crop). Petunia shoot dry weight of plants fertilized with Type 70 incorporated at 0.5x increased as the percentage of compost in the substrate increased from 0% to 60% and then decreased, while shoot dry weight of plants fertilized with Type 70 incorporated at 1x, 2x, or 3x increased as the percentage of compost increased from 0% to 30% and then decreased. Impatiens shoot dry weight of plants fertilized with Type 70 incorporated at 0.5x and 1x also increased as the percentage of compost increased from 0% to 30% and then decreased, while shoot dry weight of plants fertilized at 2x and 3x decreased as the percentage of compost increased from 0% to 100%. Both petunia and impatiens shoot dry weight of plants fertilized with Type 100 and Type 140 incorporated at 0.5x, 1x, 2x, or 3x increased as the percentage of compost increased from 0% to 60% and then decreased.

scholarly journals Bedding Plant Growth in Greenhouse Waste and Biosolid Compost

1999 ◽  
Vol 9 (2) ◽  
pp. 210-213 ◽  
Author(s):  
Kimberly A. Klock-Moore
Keyword(s):  
Plant Growth ◽  
Dry Mass ◽  
Soluble Salt ◽  
Nutrient Concentrations ◽  
Initial Substrate ◽  
Bedding Plant ◽  
Biosolid Compost ◽  
Impatiens Wallerana

Growth of `Oasis Scarlet' begonia (Begonia ×semperflorens-cultorum Hort.) and `Super Elfin Violet' impatiens (Impatiens wallerana Hook. f.) was compared in substrates containing compost made from used greenhouse substrates and yard trimmings (GHC) and in compost made from biosolids and yard trimmings (SYT). Treatments consisted of 100% compost (GHC or SYT) or compost combined with control substrate components at 60%, 30%, or 0%. Substrates containing SYT compost produced significantly larger begonia and impatiens plants than substrates containing GHC compost. Higher initial substrate nutrient concentrations in substrates containing SYT probably prompted increased begonia and impatiens growth because substrates containing SYT compost had significantly higher initial soluble salt, nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) concentrations than substrates containing GHC compost. Begonia and impatiens shoot dry mass and size linearly increased as the percentage of SYT compost in the substrate increased from 0% to 100%. However, no difference in begonia or impatiens growth was observed among the different percentages of GHC compost. Initial soluble salt, N, P, K, Ca, and Mg concentrations also linearly increased as the percentage of SYT increased while only initial P, K, and Ca concentrations linearly increased as the percentage of GHC increased.

scholarly journals Temporary Suppression of Radicle Elongation of Germinated Impatiens Seeds by Low Oxygen Concentrations

HortScience ◽  
1994 ◽  
Vol 29 (9) ◽  
pp. 1031-1033 ◽  
Author(s):  
Gary F. Polking ◽  
Richard J. Gladon ◽  
David S. Koranski
Keyword(s):  
Plant Growth ◽  
Growth Cycle ◽  
Low Oxygen ◽  
Subsequent Growth ◽  
Radicle Growth ◽  
Permanent Damage ◽  
Radicle Elongation ◽  
Germinated Seeds ◽  
Oxygen Concentrations ◽  
Impatiens Wallerana

Germinated Impatiens wallerana Hook. f. `Super Elfin Salmon Blush' seeds were exposed to subatmospheric O2 concentrations for 12, 24, or 48 hours at 25C. Suppression of radicle growth during a subsequent 24-hour simulated shipping period was monitored, as was plant growth during a subsequent growth cycle. One percent to 2% O2 for 12 or 24 hours limited radicle elongation to <1.0 mm during the simulated shipping period (darkness, ambient O2) and caused no permanent damage to seedlings. Suppression of radicle elongation with low O2 was greater with a 24-hour than a 12-hour exposure. Oxygen at 0% for 24 hours or at 0% to 1.5% O2 for 48 hours damaged seedlings irreversibly. These results show that specific subatmospheric O2 treatments can restrict radicle elongation of germinated seeds during subsequent shipment to a grower and that the low O2 treatment does not decrease subsequent plant growth.

INCREASED SEEDLING ESTABLISHMENT OF IMPATIENS WALLERANA IN RESPONSE TO LOW TEMPERATURE OR POLYETHYLENE GLYCOL SEED TREATMENTS

1980 ◽  
Vol 60 (2) ◽  
pp. 561-569 ◽  
Author(s):  
JOHN SIMMONDS
Keyword(s):  
Polyethylene Glycol ◽  
Low Temperature ◽  
Seedling Establishment ◽  
Large Scale ◽  
Soil Cover ◽  
Commercial Production ◽  
Seedling Development ◽  
Peg 6000 ◽  
Pre Treatment ◽  
Impatiens Wallerana

Seeds of Impatiens wallerana ’Elfin Scarlet’ were pre-treated with low temperature (8 °C) imbibition and hypertonic osmotic solutions of polyethylene glycol (PEG) 6000 in an attempt to improve seedling establishment under greenhouse conditions. Seeds held at 8 °C for 7 or 14 days germinated faster at 25 °C than non-treated seeds; seedling development was more rapid and there was a significant improvement in seedling establishment. Application of a soil cover improved seedling establishment in both control and pre-treated seeds. PEG pre-treated seeds germinated within 24 h of being released from osmotic control. The optimum pre-treatment was determined to be PEG −7.5 bars for 10 days, which resulted in 80% germination within 24 h, more advanced seedling development after 5 days, 92% seedling establishment and earlier flowering. Although PEG pre-treatments were superior to the low temperature pre-treatments, they are not readily applicable on a large scale. However, low temperature seed pre-treatment can be easily utilized to improve seedling establishment in commercial production.

scholarly journals Light Governs the Germination of Impatiens wallerana Hook. f. Seed

HortScience ◽  
1994 ◽  
Vol 29 (8) ◽  
pp. 854-857
Author(s):  
William J. Carpenter ◽  
Eric R. Ostmark ◽  
John A. Cornell
Keyword(s):  
Seed Germination ◽  
Light Exposure ◽  
Germination Percentage ◽  
Regression Equations ◽  
Germination Period ◽  
Radicle Emergence ◽  
Light Darkness ◽  
Role Of Light ◽  
Impatiens Wallerana

The role of light on impatiens seed germination and radicle emergence was studied. Seeds having a photodormancy require light for only part of the germination period. Germination ≥85% was achieved after 3, 2, or 1 day of irradiance at 1.5, 15, or 75 μmol·s-1·m-2, respectively. Keeping imbibed seeds in darkness for ≥2 days before light exposure caused reduced total germination percentages (G), delayed achieving 50% of the final germination percentage (T50), and increased the days between 10% and 90% germination (T90-T10). Light for 6 hours daily at 1.5, 15, or 150 μmol·s-1·m-2 promoted high G and rapid and uniform germination, but daily 12 to 24 hours of irradiance decreased G and increased T50 and T90-T10. Estimated rates of decline (increase) in G, T50, or T90-T10 with each added day of light (darkness) or increasing daily hours of light were measured by fitting regression equations. Impatiens seed germination was promoted by the initial 1 to 3 days of light, but light inhibited radicle extension in the latter germination stages.

Effect of Fertilizer Concentration on Growth of Variegated and Non-variegated Double Impatiens

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 466d-466
Author(s):  
Brian E. Whipker ◽  
Shravan K. Dasoju ◽  
Michael S. Dosmann ◽  
Jeffery K. Iles
Keyword(s):  
Growth And Development ◽  
Shoot Growth ◽  
Maximum Growth ◽  
Dry Mass ◽  
Concentration Effect ◽  
Flower Bud ◽  
Tissue Concentrations ◽  
Leaf Type ◽  
Impatiens Wallerana ◽  
Variegated Leaf

Double impatiens (Impatiens wallerana) `Blackberry Ice' (variegated-leaf type) and `Purple Magic' were grown on flood benches and irrigated with 50, 100, 200, or 300 mg·L–1 N to study the effect of fertility on growth and development. Leaf, stem, bud, and total shoot dry mass exhibited a quadratic concentration effect with maximum growth for both cultivars occurring at 100 mg·L–1 N. Tissue concentrations of N, P, and K exhibited a quadratic concentration effect and increased with fertilization concentration, however, levels were higher for `Blackberry Ice' than `Purple Magic' over all fertilization concentrations. Tissue Mg levels also increased with fertilization concentration, but levels were higher for `Purple Magic'. Tissue Ca concentrations were similar for both cultivars and levels decreased as the fertilizer concentration increased. For maximum shoot growth and flower bud production, growers should apply 100 mg·L–1 N when growing double impatiens on flood benches.

scholarly journals Use of Paclobutrazol to Control Height of Impatiens Grown in Media Containing Compost

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 436C-436
Author(s):  
Kimberly A. Klock
Keyword(s):  
Growth Regulators ◽  
Active Ingredient ◽  
Final Height ◽  
Dry Mass ◽  
Growing Media ◽  
Growing Medium ◽  
Significant Difference ◽  
Ornamental Horticulture ◽  
The Media ◽  
Impatiens Wallerana

Ornamental horticulture industries have the opportunity to utilize compost products as components in growing media, but heterogeneity among compost products can cause unpredictability in the activity of some growth regulators when applied as a drenches to the growing medium. These experiments evaluated the effect of 0%, 30%, 60%, or 100% compost (by volume) in the medium on the efficacy of paclobutrazol applied as a drench on Impatiens wallerana Hook. In experiment 1, paclobutrazol was applied at active ingredient (a.i.) drench rates of 0, 0.016, 0.032, 0.06, or 0.125 mg/pot 16 days after transplanting impatiens `Accent Red'. In experiment 2, paclobutrazol was applied at a.i. drench rates of 0, 0.25, 0.50, 1.0, or 2.0 mg/pot 14 days after transplanting impatiens `Dazzler Punch'. In both experiments, final height and size were reduced by paclobutrazol treatments compared to untreated plants. In experiment 1, shoot dry mass of treated plants was on the average of 0.92 g less than untreated plants, while shoot dry mass, in experiment 2, did not show a significant difference between treated and untreated plants. In both experiments, final height, size and shoot dry mass were significantly different among the media, with the greatest growth in 100% compost.

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