INFLUENCE DE L’ECLAIRAGE D’APPOINT SUR LA NUTRITION MINERALE DE LA TOMATE DE SERRE

1986 ◽  
Vol 66 (2) ◽  
pp. 395-402 ◽  
Author(s):  
NICOLAS TREMBLAY ◽  
MARC-J. TRUDEL ◽  
ANDRE GOSSELIN
Keyword(s):  
Lycopersicon Esculentum ◽  
Water Uptake ◽  
Mineral Nutrition ◽  
Sodium Concentration ◽  
Magnesium Concentration ◽  
Lycopersicon Esculentum Mill ◽  
Cation Uptake ◽  
Manganese Uptake ◽  
Supplementary Lighting ◽  
Potassium Magnesium

Supplementary lighting using high-pressure-sodium (HPS) lamps modified mineral nutrition of greenhouse tomato (Lycopersicon esculentum Mill.) and increased water uptake. Supplementary lighting of 30 and 60 W m−2 (PAR) increased water uptake by 35 and 70%, respectively. Nitrate, phosphate and calcium uptake was also increased. The highest irradiance (60 W m−2) increased potassium, magnesium and manganese uptake. Calcium and magnesium concentration in foliar tissues increased with irradiance, but at the same time nitrogen, potassium, phosphorus and sodium concentration decreased. The effect of nitrogen metabolism on cation uptake could partially explain the results.Key words: Tomato, supplementary HPS lighting, irradiance, mineral nutrition, Lycopersicon esculentum Mill.

INFLUENCE OF IRRADIANCE-PHOTOPERIOD COMBINATION ON TOMATO MINERAL NUTRITION

1987 ◽  
Vol 67 (2) ◽  
pp. 559-566 ◽  
Author(s):  
NICOLAS TREMBLAY ◽  
MARC-J. TRUDEL ◽  
ANDRÉ GOSSELIN
Keyword(s):  
High Pressure ◽  
Lycopersicon Esculentum ◽  
Major Ions ◽  
Reductase Activity ◽  
Nitrogen Concentration ◽  
Natural Light ◽  
Mineral Uptake ◽  
Tomato Plants ◽  
Lycopersicon Esculentum Mill ◽  
Supplementary Lighting

The irradiance-photoperiod combination was modified in an attempt to enhance the mineral uptake of tomato plants (Lycopersicon esculentum Mill. ’Marone’). Tomato plants grown in natural light were compared to plants receiving 7.56 × 105 J m−2 d−1 (400–700 nm) of high-pressure sodium (HPS) supplementary light provided at either low irradiance-long photoperiod (LILP) or high irradiance-short photoperiod (HISP). The LILP treatment promoted the greatest uptake of most major ions followed by natural light and HISP-grown plants, respectively. Supplementary lighting increased Mg concentration in the top and affected K concentration within plants differentially depending on the plant part analyzed. Nitrogen concentration in the shoot below the second flower cluster (midsection of top growth) and Ca concentration in the roots varied depending on the combination of irradiance-photoperiod. Phosphorus concentrations were not affected. Iron and Mn uptake tended to be depressed by HPS treatments. The results are consistent with the hypothesis which relates nutrient uptake to nitrate reductase activity (NRA), although NRA was not specifically measured in this experiment.Key words: Tomato, nutrition, high-pressure sodium, supplementary lighting, mineral uptake, Lycopersicon esculentum Mill.

INFLUENCE DU NIVEAU D’IRRADIANCE D’APPOINT (HPS) EN PEPINIERE SUR LA CROISSANCE ET LA PRODUCTIVITE D’UNE CULTURE DE TOMATE DE SERRE.

1986 ◽  
Vol 66 (4) ◽  
pp. 961-970 ◽  
Author(s):  
CLAIRE BOIVIN ◽  
MARC-J. TRUDEL ◽  
ANDRÉ GOSSELIN
Keyword(s):  
Lycopersicon Esculentum ◽  
Dry Weight ◽  
Natural Light ◽  
Tomato Plants ◽  
The Third ◽  
Lycopersicon Esculentum Mill ◽  
Shoot Dry Weight ◽  
Seeding Date ◽  
Supplementary Lighting ◽  
Natural Irradiance

Tomato plants (Lycopersicon esculentum Mill. ’Vendor’) were seeded at three different dates between 23 Jan. and 17 Feb. 1984. Young tomato plants received the following supplementary lighting treatments: natural light only, and natural irradiance supplemented by 10, 20 or 30 W m−2 (PAR) for a photoperiod of 17 h. Twenty-nine days after the first seeding date, shoot dry weight of plants grown under 10, 20 or 30 W m−2 was, respectively, 311, 378 and 458% of the control. Shoot dry weight of the third seeding was 159, 181 and 207% of the control for the 10-, 20- or 30-W m−2 treatments, respectively. Early yields were increased by 19,4, 31,2 and 42% when tomato transplants received 10, 20 or 30 W m−2. Total yields were not significantly affected by supplementary lighting provided in the nursery period.Key words: Tomato, supplementary light, growth, productivity, HPS, Lycopersicon esculentum Mill.

EFFETS A LONG TERME DE L’ENRICHISSEMENT CARBONÉ SUR LA TOMATE DE SERRE CULTIVÉE AVEC OU SANS ÉCLAIRAGE D’APPOINT

1987 ◽  
Vol 67 (3) ◽  
pp. 899-907 ◽  
Author(s):  
SERGE YELLE ◽  
ANDRE GOSSELIN ◽  
MARC-J. TRUDEL
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Lycopersicon Esculentum ◽  
Water Use ◽  
Synergetic Effect ◽  
Growth Yield ◽  
Lycopersicon Esculentum Mill ◽  
Supplementary Lighting

Tomato (Lycopersicon esculentum Mill. ’Vedettos’) was grown under three different concentrations of atmospheric CO2 (330, 900 and 1500 ppm) and two lighting intensities (natural and natural plus 30 W m−2 (PAR)) provided by high-pressure sodium lights (HPS). Results show a reduction in CO2 efficiency after eight weeks of enrichment. The higher the CO2 concentration, the more serious is this reduction. Our results show the potential of CO2 enrichment and supplementary lighting as well as their synergetic effect on productivity (yield increases of 32, 73 and 122%, respectively). Supplementary lighting does not compensate for the reduction of CO2 efficiency. Concentrations of 900 and 1500 ppm increased the plants’ water-use efficiency.Key words: Carbon dioxide, tomato, greenhouse, growth, yield

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