QUALITY OF POTATO TRANSPLANTS AS AFFECTED BY CARBON DIOXIDE ENRICHMENT AND PHOTOSYNTHETIC PHOTON FLUX

2004 ◽  
pp. 261-265
Author(s):  
Y.H. Kim ◽  
Y.H. Choi
Keyword(s):  
Carbon Dioxide ◽  
Photon Flux ◽  
Carbon Dioxide Enrichment ◽  
Photosynthetic Photon Flux

scholarly journals Irradiance, Temperature, and Carbon Dioxide Enrichment Affect Photosynthesis in Phalaenopsis Hybrids

HortScience ◽  
1998 ◽  
Vol 33 (7) ◽  
pp. 1183-1185 ◽  
Author(s):  
P. Lootens ◽  
J. Heursel
Keyword(s):  
Carbon Dioxide ◽  
Respiration Rate ◽  
Photon Flux ◽  
Carbon Dioxide Enrichment ◽  
Photosynthetic Photon Flux ◽  
Night Temperature ◽  
Short Term ◽  
Short Term Effects

The short-term effects of photosynthetic photon flux (PPF), day/night temperatures and CO2 concentration on CO2 exchange were determined for two Phalaenopsis hybrids. At 20 °C, the saturating PPF for photosynthesis was 180 μmol·m-2s-1. At this PPF and ambient CO2 level (380 μL·L-1), a day/night temperature of 20/15 °C resulted in the largest daily CO2 uptake. Higher night temperatures probably increased the respiration rate and lowered daily CO2 uptake in comparison with 20/15 °C. An increase in the CO2 concentration from 380 to 950 μL·L-1 increased daily CO2 uptake by 82%.

scholarly journals Effect of Preharvest Carbon Dioxide Enrichment on the Postharvest Quality of Tomatoes.

1995 ◽  
Vol 64 (3) ◽  
pp. 649-655 ◽  
Author(s):  
Md. Shahidul Islam ◽  
Toshiyuki Matsui ◽  
Yuichi Yoshida
Keyword(s):  
Carbon Dioxide ◽  
Postharvest Quality ◽  
Carbon Dioxide Enrichment

scholarly journals 508 PB 254 EFFECT OF CARBON DIOXIDE ENRICHMENT ON PRODUCTION AND QUALITY OF GREENHOUSE `ROYALTY ROSES PRODUCED IN COASTAL CENTRAL CALIFORNIA

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 504c-504
Author(s):  
Steven A. Tjosvold
Keyword(s):  
Carbon Dioxide ◽  
Stem Length ◽  
Total Production ◽  
Carbon Dioxide Enrichment ◽  
Flower Buds ◽  
Central California ◽  
Stems And Leaves

The atmosphere of commercial greenhouses were enriched to 1200 μl·1-1 carbon dioxide 1 hour before sunrise and maintained until ventilation was necessary to cool the greenhouse and again anytime the greenhouse vents were closed in the daytime. Enrichment was only possible, on average, for 5 daylight hours in the winter and less in the warmer months. In the first 10 month experiment, total production was not different in carbon dioxide enriched greenhouses. Stem lengths of harvested flowers were generally longer in the enriched greenhouses, particularly in the winter months. In the second 10 month experiment, total production was again not different in carbon dioxide enriched greenhouses, however, stem length was only slightly longer in the winter months. Dry weights of flower buds, stems and leaves increased slightly but only in winter months.

scholarly journals Vernalization Duration and Light Intensity Influence Flowering of Three Hybrid Nobile Dendrobium Cultivars

HortScience ◽  
2011 ◽  
Vol 46 (3) ◽  
pp. 406-410 ◽  
Author(s):  
Min Lin ◽  
Terri W. Starman ◽  
Yin-Tung Wang ◽  
Genhua Niu
Keyword(s):  
Light Intensity ◽  
Flowering Time ◽  
Photon Flux ◽  
Flower Initiation ◽  
Flower Longevity ◽  
Photosynthetic Photon Flux ◽  
Flower Diameter ◽  
Flower Quality ◽  
Delayed Flowering

The flowering time and flower quality of three hybrid Dendrobium nobile cultivars in relation to light intensity during cooling and duration of vernalization were studied in the first experiment. Mature Dendrobium Red Emperor ‘Prince’, Den. Sea Mary ‘Snow King’, and Den. Love Memory ‘Fizz’ plants were vernalized at 10 °C under 300 to 350 μmol·m−2·s−1 photosynthetic photon flux (PPF) (12-h photoperiod) or darkness, each with four cooling durations (2, 4, 6, or 8 weeks). Plants were forced in a greenhouse after vernalization. At least 4 weeks of 10 °C cooling in light was needed for complete flower initiation of Den. Red Emperor ‘Prince’, whereas Den. Sea Mary ‘Snow King’ and Den. Love Memory ‘Fizz’ only needed 2 weeks of 10 °C cooling regardless of light. For all three cultivars, darkness during vernalization slightly delayed flowering and resulted in fewer but larger flowers. Longer cooling duration delayed flowering, decreased flower longevity, and produced more and larger flowers. In a second experiment, Den. Love Memory ‘Fizz’ plants were vernalized at 15 °C for 4 weeks under a 12-h photoperiod and PPF of 0, 50, 100, or 200 μmol·m−2·s−1. Compared with 200 μmol·m−2·s−1, low PPF at 50 or 100 μmol·m−2·s−1 did not affect flowering time or flower qualities; however, darkness delayed flowering and reduced flower qualities except flower diameter.

scholarly journals The Impact of Carbon Dioxide Concentrations and Low to Adequate Photosynthetic Photon Flux Density on Growth, Physiology and Nutrient Use Efficiency of Juvenile Cacao Genotypes

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 397 ◽  
Author(s):  
Virupax C. Baligar ◽  
Marshall K. Elson ◽  
Alex-Alan F. Almeida ◽  
Quintino R. de Araujo ◽  
Dario Ahnert ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Leaf Area ◽  
Nutrient Use Efficiency ◽  
Photosynthetic Photon Flux Density ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Photosynthetic Photon Flux ◽  
Growth Physiology ◽  
Nutrient Use ◽  
Use Efficiency

Cacao (Theobroma cacao L.) was grown as an understory tree in agroforestry systems where it received inadequate to adequate levels of photosynthetic photon flux density (PPFD). As atmospheric carbon dioxide steadily increased, it was unclear what impact this would have on cacao growth and development at low PPFD. This research evaluated the effects of ambient and elevated levels carbon dioxide under inadequate to adequate levels of PPFD on growth, physiological and nutrient use efficiency traits of seven genetically contrasting juvenile cacao genotypes. Growth parameters (total and root dry weight, root length, stem height, leaf area, relative growth rate and net assimilation rates increased, and specific leaf area decreased significantly in response to increasing carbon dioxide and PPFD. Increasing carbon dioxide and PPFD levels significantly increased net photosynthesis and water-use efficiency traits but significantly reduced stomatal conductance and transpiration. With few exceptions, increasing carbon dioxide and PPFD reduced macro–micro nutrient concentrations but increased uptake, influx, transport and nutrient use efficiency in all cacao genotypes. Irrespective of levels of carbon dioxide and PPFD, intraspecific differences were observed for growth, physiology and nutrient use efficiency of cacao genotypes.

scholarly journals Carbon Dioxide Enrichment Combined with Supplemental Light Improve Growth and Quality of Plug Seedlings of Astragalus membranaceus Bunge and Codonopsis lanceolata Benth. et Hook. f.

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 715
Author(s):  
Ya Liu ◽  
Xiuxia Ren ◽  
Byoung Ryong Jeong
Keyword(s):  
Carbon Dioxide ◽  
Growth And Development ◽  
Stem Diameter ◽  
Astragalus Membranaceus ◽  
Photon Flux ◽  
Medicinal Species ◽  
Codonopsis Lanceolata ◽  
Supplemental Lighting ◽  
Enriched Co2

Astragalus membranaceus Bunge and Codonopsis lanceolata Benth. et Hook. f. are two medicinal species used to remedy inflammation, tumor, and obesity in Eastern medicine. Carbon dioxide (CO2) and supplemental lighting are two methods to enhance the growth, yield, and quality of crops. However, few studies have focused on the synergistic effects of CO2 and the supplemental light source on plug seedlings of medicinal species. In this study, uniform seedlings were grown with no supplemental light (the control) or under one of three supplemental light sources [high pressure sodium (HPS), metal halide (MH), or mixed light-emitting diodes (LEDs)] combined with one of three levels of CO2 (350, 700, or 1050 μmol·mol−1). The supplemental light (100 μmol·m−2·s−1 photosynthetic photon flux density) and CO2 were provided simultaneously from 10:00 pm to 2:00 am every day. The results showed that the supplemental lighting (LEDs, MH, and HPS) greatly improved the seedling quality with greater dry weights (of the shoot, root, and leaf), stem diameter, leaf area, and Dickson’s quality index (DQI) than those of the control in both species. An enriched CO2 at 1050 μmol·mol−1 accelerated the growth and development of plug seedlings, evidenced by the increased root and leaf dry weights, stem diameter, and DQI compared to the those from the other two CO2 enrichment levels. Moreover, LEDs combined with 1050 μmol·mol−1 CO2 not only increased the contents of soluble sugars but also the starch content. However, an enriched CO2 at 700 μmol·mol−1 was more suitable for the accumulation of total phenols and flavonoids. Furthermore, LEDs combined with 700 or 1050 μmol·mol−1 CO2 increased the chlorophyll, quantum yield, and stomatal conductance at daytime and nighttime for A. membranaceus and C. lanceolata, respectively. In conclusion, the data suggest that LEDs combined with CO2 at 1050 μmol·mol−1 is recommended for enhancing the growth and development of plug seedlings of A. membranaceus and C. lanceolata.

scholarly journals Effect of Carbon Dioxide Enrichment on Vine Growth and Berry Quality of ^|^lsquo;Kyoho^|^rsquo; Grapes

1990 ◽  
Vol 59 (3) ◽  
pp. 463-470 ◽  
Author(s):  
Hiroshi KUROOKA ◽  
Shingo FUKUNAGA ◽  
Eiji YUDA ◽  
Shoichi NAKAGAWA ◽  
Shosaku HORIUCHI
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Enrichment ◽  
Vine Growth ◽  
Berry Quality
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