Nitrogen and calcium nutrition of Petunia × hybrida ‘Coral Sea’

Frett, John J.; Dirr, Michael A.; Armitage, Allan M.

doi:10.1016/0304-4238(85)90019-6

Cited by 15 publications

(13 citation statements)

References 6 publications

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“…Chase and Poole (1987), Gislerød and Mortensen (1990), and Witte and Sheenan (1974) all found that there is an optimal fertilizer concentration for growth. Similarly, Frett et al (1985) compared growth of petunias fertilized with 0, 100, 200, or 400 mg·L -1 N; dry weight, branch length, and flowering were greatest with 200 mg·L -1 N. None of these experiments was conducted using closed subirrigation systems. The only known study on fertilizer rates with subirrigated begonias was conducted by Lemaire et al (1995), who determined the effect of fertilizer concentration on begonia growth.…”

mentioning

confidence: 99%

Fertilizer Concentration Affects Growth and Flowering of Subirrigated Petunias and Begonias

James¹,

Iersel²

2001

HortSci

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Nitrate pollution and water conservation are two of the most important environmental concerns for greenhouse growers. Closed irrigation systems, such as ebb and flow, can minimize these problems. The objective of this study was to determine optimal fertilizer concentrations for petunia (Petunia×hybrida Hort. Vilm-Andr.) and begonia (Begoni××emperflorens-cultorum Hort.) grown with ebb-and-flow irrigation. `Ambassador Scarlet' begonia and `Dreams Mix' petunia were grown as bedding plants in three soilless media. Plants were fertilized with solutions of a 20N-4.4P-16.6K water-soluble fertilizer with electrical conductivities (EC) of 0.15, 0.6, 1.2, 1.8, 2.4, or 3.0 dS·m-1. Maximum growth occurred with a fertilizer EC of 2.2 dS·m-1 for petunia and 1.6 dS·m-1 for begonia. Petunia growth was best in the medium with the highest porosity (Metro-Mix 220), but choice of medium had little effect on begonia growth. Leachate EC and pH were determined throughout the experiment, using the pour-through method. Leachate EC rose with increasing fertilizer concentration, and increased over time. The pH of the leachate decreased with increasing fertilizer concentration and dropped 0.5 to 1 unit over the course of the experiment with the higher fertilizer concentrations (≥0.6 dS·m-1). Plant growth was not very sensitive to leachate EC. Begonia and petunia grew well when the EC at the end of the production cycle was between 1.7 to 6.1 and 2.1 and 5.4 dS·m-1, respectively.

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confidence: 99%

Fertilizer Concentration Affects Growth and Flowering of Subirrigated Petunias and Begonias

James¹,

Iersel²

2001

HortSci

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“…At 150 mg/L of fertilizer, all plants produced more flowers than at 300 mg/ L of fertilizer (Table 2). Nutritional deficiency or excess were evidently harmful to the number of flowers per plant (FRETT, 1985). In the absence of fertilization, P SAG12 -ipt lines retained more chlorophyll in the lower leaves than wild-type plants (Table 2).…”

Section: Resultsmentioning

confidence: 99%

“…Its life cycle is short, which decreases the time necessary to get experimental results and its flowering can be expected 8 weeks to 13 weeks after sowing (DOLE, 1999). (JOHNSON & SKELTON, 1972;BOODLEY, 1981;FRETT et al, 1985). The commercial nutritional recommendation for bedding plants, at continuous feeding, is 50 to 150 mg/L of 15N: 5P: 15K (Scotts -Sierra Horticultural Products Company, Marysville, OH, USA).…”

Section: Introductionmentioning

confidence: 99%

Avaliação de plantas transgênicas de Petunia x hybrida contendo o gene Psag12 - ipt cultivadas sob deficiência nutricional.

Cuquel¹,

Minami²

2001

RBHO

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Nutritional deficiency in plants can causes chlorosis, necrosis, defoliation, reduced growth, reduced yield, and premature senescence. Exogenous applications of cytokinin can alleviate these symptoms. This study was conducted to evaluate the effects of an auto regulated cytokinin production on the nutritional deficiency tolerance in Petunia x hybrida plants. A chimeric gene of the senescencespecific SAG12 promoter and the ipt gene coding for isopentenyl transferase, a rate-limiting enzyme in the cytokinin biosynthesis pathway, was introduced into Petunia x hybrida plants by Agrobacterium-mediated transformation. Two transgenic plants containing the ipt gene were selected and self-pollinated to obtain the lines evaluated for nutritional deficiency tolerance analysis. Both transgenic P SAG12 -ipt lines analyzed were more tolerant to nutritional deficiency than wild-type plants. The results indicated that endogenous cytokinin can counteract nutritional deficiency symptoms.

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“…In the recent floricultural literature, however, ecophysiological characteristics of crop species under study, in particular their native soil preferences, have received little attention. Thus, in artificial environments, the response of a floral crop to applied Ca may be positive (as discussed above), or it may be indifferent (Frett et al, 1985;Smith et al, 1998). No quantitative data are available on greenhouse culture and management of L. havardii, particularly in regard to mineral nutrient requirements and response to Ca fertilization.…”

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confidence: 99%

Calcium-activated Root Growth and Mineral Nutrient Accumulation of Lupinus havardii: Ecophysiological and Horticultural Significance

Picchioni¹,

Valenzuela-Vazquez²,

Armenta-Sanchez³

2001

jashs

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Lupinus havardii Wats. (Big Bend bluebonnet) has received considerable attention as a new specialty cut flower crop. We studied the consequences of Ca fertigation on growth, water use, and mineral nutrient uptake of L. havardii (`Texas Sapphire') for 88 days in a greenhouse. Four Ca concentrations were included (as CaCl2) in the fertigation solution at concentrations of 0, 2.5, 5.0, or 10.0 mm. Calcium supply did not affect the number of racemes produced per plant or total dry matter accumulation per plant. However, root dry matter accumulation, root: shoot ratio, net root mineral nutrient accumulation (milligrams P, K, Ca, Mg, and Fe per plant; micrograms Mn, B, and Cu per plant), and the preferential allocation of mineral nutrients to roots were influenced quadratically by CaCl2 supply, increasing up to 5.0 mm CaCl2 and then decreasing at 10.0 mm CaCl2. Lack of root sink response by plants exposed to 10.0 mm CaCl2 was associated with lowest daily rate of pot evapotranspiration, probably resulting from osmotic or Cl toxicity stress. Increased root sink strength for dry matter and mineral nutrients in response to CaCl2 supply up to 5.0 mm Ca is consistent with calcicole-like behavior and the native distribution of L. havardii on xeric, calcareous soils, where root growth and expansion favoring water and mineral nutrient acquisition may be of significant adaptive value for survival. The Carelated increase in root growth was reflected in up to a 5% to 20% increase in fertilizer P and K recovery per plant. Results indicate that Ca fertilization may be an effective horticultural strategy in greenhouse production of L. havardii, particularly for matching the natural edaphic habitat of the species and thus increasing efficiency of water and mineral nutrient management.

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Nitrogen and calcium nutrition of Petunia × hybrida ‘Coral Sea’

Cited by 15 publications

References 6 publications

Fertilizer Concentration Affects Growth and Flowering of Subirrigated Petunias and Begonias

Fertilizer Concentration Affects Growth and Flowering of Subirrigated Petunias and Begonias

Avaliação de plantas transgênicas de Petunia x hybrida contendo o gene Psag12 - ipt cultivadas sob deficiência nutricional.

Calcium-activated Root Growth and Mineral Nutrient Accumulation of Lupinus havardii: Ecophysiological and Horticultural Significance

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