Ability of multiplicative models to simulate stomatal resistance along plant growth: application to New Guinea impatiens grown in a greenhouse

As the green industry is moving toward sustainability to meet the demands of society, the use of biocontainers as alternatives to petroleum-based plastic containers has drawn significant attention. Field trials of seven plantable biocontainers (coir, manure, peat, rice hull, soil wrap, straw, and wood fiber) were conducted in 2011 and 2012 at five locations in the United States to assess the influence of direct-plant biocontainers on plant growth and establishment and the rate of container decomposition in landscape. In 2011, container type did not affect the growth of any of the three species used in this study with an exception in one location. The three species were ‘Sunpatiens Compact Magenta’ new guinea impatiens (Impatiens ×hybrida), ‘Luscious Citrus’ lantana (Lantana camara), and ‘Senorita Rosalita’ cleome (Cleome ×hybrida). In 2012, the effect of container type on plant growth varied with location and species. Cleome, new guinea impatiens, and lantana plants grown in coir and straw containers were in general smaller than those in peat, plastic, rice hull, and wood fiber containers. After 3 to 4 months in the field, manure containers had on average the highest rate of decomposition at 88% for all five locations and two growing seasons. The levels of decomposition of other containers, straw, wood fiber, soil wrap, peat, coir, and rice hull were 47%, 46%, 42%, 38%, 25%, and 18%, respectively, in descending order. Plantable containers did not hinder plant establishment and posttransplant plant growth. The impact of container type on plant growth was smaller compared with that of location (climate). Similarly, the impact of plant species on pot decomposition was smaller compared with that of pot material.

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Modelling the stomatal resistance under water comfort and restriction to assess the transpiration of a greenhouse New Guinea impatiens crop

Acta Horticulturae ◽

10.17660/actahortic.2017.1170.76 ◽

2017 ◽

pp. 611-618

Author(s):

H. Bouhoun Ali ◽

E. Chantoiseau ◽

P.E. Bournet ◽

P. Cannavo ◽

C. Migeon ◽

...

Keyword(s):

New Guinea ◽

Stomatal Resistance ◽

New Guinea Impatiens

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Stomatal resistance modelling using the full factorial design: application to the New Guinea impatiens

Acta Horticulturae ◽

10.17660/actahortic.2017.1170.49 ◽

2017 ◽

pp. 399-408

Author(s):

H. Bouhoun Ali ◽

P.E. Bournet ◽

P. Cannavo ◽

C. Migeon ◽

E. Chantoiseau ◽

...

Keyword(s):

Factorial Design ◽

New Guinea ◽

Stomatal Resistance ◽

Full Factorial Design ◽

New Guinea Impatiens ◽

Full Factorial

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THE EFFECTS OF GROWTH REGULATORS ON FLOWERING, BRANCHING PATTERNS AND GROWTH OF NEW GUINEA IMPATIENS

HortScience ◽

10.21273/hortsci.25.9.1099c ◽

1990 ◽

Vol 25 (9) ◽

pp. 1099c-1099

Author(s):

J. Phillip McKnight ◽

G. L. Klingaman

Keyword(s):

Plant Growth ◽

Flower Development ◽

No Reduction ◽

New Guinea ◽

Bedding Plants ◽

Control Growth ◽

Branching Patterns ◽

New Guinea Impatiens ◽

Number Of Branches ◽

Growth Regulator Treatment

Eighteen New Guinea impatiens cultivars were evaluated for performance as bedding plants and for suitability as hanging basket plants. The cultivars were treated with three growth retarding chemicals (B-9, Sumagic and Cutless) to determine their effect on plant growth, branching and overall flower development. Two applications of 2500 ppm B-9 produced the most commercially acceptable plants. Height and spread were reduced by approximately 30 percent with no reduction in the number of flowers produced or the number of days to bloom. Cutless and Sumagic applications reduced growth approximately 50 percent and delayed blooming as much as 2 weeks when compared to the untreated control. Growth regulator treatment had no effect on the number of branches produced except with Sumagic which resulted in an overall reduction in branching.

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Stomatal resistance of New Guinea Impatiens pot plants. Part 1: Model development for well watered plants based on design of experiments

Biosystems Engineering ◽

10.1016/j.biosystemseng.2016.05.004 ◽

2016 ◽

Vol 149 ◽

pp. 112-124 ◽

Cited By ~ 8

Author(s):

Hacene Bouhoun Ali ◽

Pierre-Emmanuel Bournet ◽

Patrice Cannavo ◽

Etienne Chantoiseau ◽

Mathilde Sourgnes

Keyword(s):

Design Of Experiments ◽

Model Development ◽

New Guinea ◽

Stomatal Resistance ◽

New Guinea Impatiens ◽

Pot Plants

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Stomatal resistance of New Guinea Impatiens pot plants. Part 2: Model extension for water restriction and application to irrigation scheduling

Biosystems Engineering ◽

10.1016/j.biosystemseng.2016.07.001 ◽

2016 ◽

Vol 149 ◽

pp. 82-93 ◽

Cited By ~ 4

Author(s):

Patrice Cannavo ◽

Hacène Bouhoun Ali ◽

Etienne Chantoiseau ◽

Christophe Migeon ◽

Sylvain Charpentier ◽

...

Keyword(s):

New Guinea ◽

Stomatal Resistance ◽

Irrigation Scheduling ◽

Water Restriction ◽

Model Extension ◽

New Guinea Impatiens ◽

Pot Plants

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Phosphorus Restriction as an Alternative to Chemical Plant Growth Retardants in Angelonia and New Guinea Impatiens

HortTechnology ◽

10.21273/horttech03939-17 ◽

2018 ◽

Vol 28 (2) ◽

pp. 136-142

Author(s):

Josh B. Henry ◽

Ingram McCall ◽

Brian E. Whipker

Keyword(s):

Plant Growth ◽

Stem Elongation ◽

Control Plant ◽

Growth Index ◽

New Guinea ◽

Chemical Plant ◽

Growth Retardants ◽

P Deficiency ◽

Plant Growth Retardants ◽

New Guinea Impatiens

Chemical plant growth retardants (PGRs) are commonly used to produce compact bedding plants. Few PGRs are labeled for sensitive species because of the concern of excessive restriction of stem elongation or phytotoxicity. Growers are therefore presented with a dilemma: produce untreated plants that may be too tall or risk applying a PGR that can potentially lead to irreversible aesthetic damage to the plant. Nutrient restriction, specifically of phosphorus (P), may be used to control plant height. This study was conducted to determine if restricting P fertilization yielded comparable growth control to plants produced with PGRs. Two cultivars each of new guinea impatiens (Impatiens hawkeri) and angelonia (Angelonia angustifolia) were grown using five fertilizers that varied by P concentration (0, 2.5, 5, 10, and 20 ppm). Half of the plants from each P fertilizer concentration were treated with paclobutrazol at 4 and 5 weeks after transplant for angelonia and new guinea impatiens, respectively. On termination of the experiment, data were collected for height, diameter, and dry weight, which were used to determine a growth index (GI). Angelonia GI values were maximized with 7–9 ppm P, whereas new guinea impatiens GI was maximized with 8–11 ppm P. Concentrations of 3–5 ppm P provided similar height control to plants grown with nonlimiting P and a paclobutrazol application. Concentrations of ≤2.5 ppm P resulted in low-quality plants with visual symptoms of P deficiency. These results indicate that a narrow range of P concentrations may be used to control stem elongation and keep plants compact.

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Impact of Applied Nitrogen Concentration on Growth of Elatior Begonia and New Guinea Impatiens and Susceptibility of Begonia to Botrytis cinerea

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.132.2.193 ◽

2007 ◽

Vol 132 (2) ◽

pp. 193-201 ◽

Cited By ~ 5

Author(s):

Dharmalingam S. Pitchay ◽

Jonathan M. Frantz ◽

James C. Locke ◽

Charles R. Krause ◽

George C. J. Fernandez

Keyword(s):

Plant Growth ◽

Nutrient Uptake ◽

Botrytis Cinerea ◽

Chlorophyll Content ◽

New Guinea ◽

Utilization Efficiency ◽

N Supply ◽

Wide Range ◽

Growth Development ◽

New Guinea Impatiens

Plant performance and appearance in deficient and toxic levels of nutrients are well characterized. However, less is known about the potential subtleties of plant growth, form, development, nutrient uptake, and biotic stress tolerance in the broad tolerable range. Begonia [Beg (Begonia × tuberhybrida Voss)] and new guinea impatiens [NGI (Impatiens hawkeri Bull.)] were grown over a wide range of N (from 1.78 to 57.1 mm NH4:NO3 ratio at a 1:1 ratio supplied as nutrient solution) in a peat:perlite soilless substrate in greenhouse conditions. Plant growth, development, chlorophyll content, leaf angle, nutrient uptake, tissue caloric value, and susceptibility to Botrytis cinerea Pers.:Fr. disease were evaluated in two experiments. Elevated N supply resulted in decreased plant height (16% in Beg and 7% to 16% in NGI), flower count (3% to 48% in Beg and 7% to 49% in NGI), bud numbers (23% to 80% in Beg), canopy area (11% to 33% in NGI), and mass (21% to 33% in Beg and 18% to 58% in NGI). Chlorophyll content saturated at an N supply of 28.6 mm. N uptake efficiency, shoot N use efficiency, and shoot N utilization efficiency decreased with increasing N supply. Elevated levels of N supply from 7.15 to 57.1 mm also increased the susceptibility of Beg to B. cinerea disease by 10% to 80% in stems and 3% to 14% in leaves. The increase in susceptibility also corresponded with increased tissue energy content (kJ·g−1) and altered leaf orientation. This study indicates many plant changes occur between nutrient extremes that can have a significant impact on growth, development, and the ability to withstand disease.

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Simulated Water Use and Growth of New Guinea Impatiens (Impatiens X hb.) in Single Pots Using Root Zone Heating

Transactions of the ASAE ◽

10.13031/2013.28538 ◽

1993 ◽

Vol 36 (6) ◽

pp. 1887-1893

Author(s):

G. E. Meyer ◽

G. Ridder ◽

J. B. Fitzgerald ◽

D. D. Schulte

Keyword(s):

Water Use ◽

Root Zone ◽

New Guinea ◽

New Guinea Impatiens

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Identifying the Optimal Application Rate of Three Fertilizers Used to Grow New Guinea Impatiens

Journal of Environmental Horticulture ◽

10.24266/0738-2898-34.4.118 ◽

2016 ◽

Vol 34 (4) ◽

pp. 118-122

Author(s):

A.K. Ostrom ◽

C.C. Pasian

Keyword(s):

Controlled Release ◽

Consumer Preferences ◽

Tap Water ◽

Consumer Preference ◽

New Guinea ◽

Water Soluble ◽

Plant Weight ◽

Preference Ratings ◽

New Guinea Impatiens

This manuscript describes the effect of controlled-release, and water-soluble fertilizers on the growth and quality of New Guinea impatiens (NGI) (Impatiens hawkeri Bull.). Three different fertilizers were applied at three rates each in order to investigate their effect on growth and quality of ‘Paradise New Red.’ NGI. Fertilizer treatments included 1) a 20-4.4-16.6 water-soluble fertilizer (WSF), 2) a 10-1.8-2.5 soybean-based fertilizer (SBF), and 3) a 15-4-10, three-to four-month longevity controlled-release fertilizer (CRF). CRF was applied as a pre-plant at 1×, 0.75×, and 0.5× the label rate. WSF and SBF fertigation rates of 75, 150, and 250 mg·L−1 N (75, 150, and 250 ppm N), respectively, were used based on a common range of fertigation rates in a greenhouse setting from what is considered relatively low, moderate, and high for NGI production. Plants were irrigated or fertigated by hand every 1 to 5 days as needed, based on environmental conditions and plant size, with either approximately 300 mL (10.4 oz) of either tap water or a fertilizer solution. SPAD readings, above ground plant weight, consumer preference ratings, and cumulative flower number were measured and used to calculate a quality index (QI). Optimal fertilizer rates as determined by the QI were found to be 1) CRF at 7.11 kg·m−3 (11.8 lb·yd−3), 2) SBF at 150 mg·L−1 (150 ppm) N, and 3) WSF at 75 mg·L−1 (75 ppm) N. With the application method used in this work, the WSF was more efficient than the SBF because it produced high quality plants with less fertilizer applied. While for the most part overall consumer preference ratings coincided with plant dry weight, there were some exceptions, indicating that consumers can prefer plants that are not necessary the largest as indicated by their dry weights. Consumer preferences may not coincide with typical plant parameters of plant growth all the time. Consumer preferences should be always considered in an industry that sell its products based mainly on their appearance.

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