東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Manipulating Light Quality, Light In...

Craver, Joshua Ken.

Linked to FindBook

Google Book

Amazon

博客來

Manipulating Light Quality, Light Intensity, and Carbon Dioxide Concentration to Optimize Indoor and Greenhouse Production of Annual Bedding Plant Seedlings.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Manipulating Light Quality, Light Intensity, and Carbon Dioxide Concentration to Optimize Indoor and Greenhouse Production of Annual Bedding Plant Seedlings./
Author:	Craver, Joshua Ken.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	199 p.
Notes:	Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Contained By:	Dissertation Abstracts International79-10B(E).
Subject:	Horticulture. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10790700
ISBN:	9780438017795

Manipulating Light Quality, Light Intensity, and Carbon Dioxide Concentration to Optimize Indoor and Greenhouse Production of Annual Bedding Plant Seedlings.
Craver, Joshua Ken.

Manipulating Light Quality, Light Intensity, and Carbon Dioxide Concentration to Optimize Indoor and Greenhouse Production of Annual Bedding Plant Seedlings. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 199 p.

Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.

Thesis (Ph.D.)--Purdue University, 2018.

Annual bedding plant seedlings (plugs) are commonly produced in northern latitudes during the late winter and early spring when the natural daily light integral (DLI) in greenhouses is below recommended levels. Greenhouse supplemental lighting (SL) provides a means of increasing the DLI, with high-pressure sodium (HPS) lamps representing the current industry standard. However, low-profile and high-intensity light-emitting diode (LED) fixtures have recently emerged as a possible alternative for greenhouse SL. Additionally, due to the emission of very little radiant heat, LEDs may be used for sole-source lighting (SSL) applications where plants are produced on vertical shelving units in warehouses or shipping containers and in close proximity to the fixtures. Thus, with the development of LEDs for horticultural applications, the possibility of producing seedlings indoors using multi-layered, vertical production systems has become an increasingly realistic possibility. Therefore, the objectives of this research were to 1) compare HPS and LED SL sources in a commercial greenhouse for the propagation and finishing of annual bedding plant seedlings (Expt. 1); 2) evaluate the effects of various LED light qualities and intensities in a SSL environment on the morphology, nutrient uptake, and subsequent flowering of coreopsis (Coreopsis grandiflora 'Sunfire'), pansy (Viola xwittrockiana 'MatrixTM Yellow'), and petunia (Petunia xhybrida 'Purple Wave') seedlings (Expt. 2); and 3) determine the morphological and physiological responses of petunia 'Dreams Midnight' seedlings to the interactive effect of light intensity, light quality, and carbon dioxide (CO2) concentration under LED SSL (Expt. 3).

ISBN: 9780438017795Subjects--Topical Terms:

555447
Horticulture.

Manipulating Light Quality, Light Intensity, and Carbon Dioxide Concentration to Optimize Indoor and Greenhouse Production of Annual Bedding Plant Seedlings.
LDR:05400nmm a2200325 4500 001 2200222
005 20181214130636.5
008 201008s2018 ||||||||||||||||| ||eng d
020 $a 9780438017795
035 $a (MiAaPQ)AAI10790700
035 $a (MiAaPQ)purdue:22468
035 $a AAI10790700
040 $a MiAaPQ $c MiAaPQ
100 1 $a Craver, Joshua Ken. $3 3426970
245 1 0 $a Manipulating Light Quality, Light Intensity, and Carbon Dioxide Concentration to Optimize Indoor and Greenhouse Production of Annual Bedding Plant Seedlings.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 199 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
500 $a Advisers: Roberto G. Lopez; Cary A. Mitchell.
502 $a Thesis (Ph.D.)--Purdue University, 2018.
520 $a Annual bedding plant seedlings (plugs) are commonly produced in northern latitudes during the late winter and early spring when the natural daily light integral (DLI) in greenhouses is below recommended levels. Greenhouse supplemental lighting (SL) provides a means of increasing the DLI, with high-pressure sodium (HPS) lamps representing the current industry standard. However, low-profile and high-intensity light-emitting diode (LED) fixtures have recently emerged as a possible alternative for greenhouse SL. Additionally, due to the emission of very little radiant heat, LEDs may be used for sole-source lighting (SSL) applications where plants are produced on vertical shelving units in warehouses or shipping containers and in close proximity to the fixtures. Thus, with the development of LEDs for horticultural applications, the possibility of producing seedlings indoors using multi-layered, vertical production systems has become an increasingly realistic possibility. Therefore, the objectives of this research were to 1) compare HPS and LED SL sources in a commercial greenhouse for the propagation and finishing of annual bedding plant seedlings (Expt. 1); 2) evaluate the effects of various LED light qualities and intensities in a SSL environment on the morphology, nutrient uptake, and subsequent flowering of coreopsis (Coreopsis grandiflora 'Sunfire'), pansy (Viola xwittrockiana 'MatrixTM Yellow'), and petunia (Petunia xhybrida 'Purple Wave') seedlings (Expt. 2); and 3) determine the morphological and physiological responses of petunia 'Dreams Midnight' seedlings to the interactive effect of light intensity, light quality, and carbon dioxide (CO2) concentration under LED SSL (Expt. 3).
520 $a In Expt. 1, both seedlings and finished plants produced under LED and HPS SL were comparable in quality, while seedlings produced under no SL were of significantly lower quality. In Expt. 2, light intensity was the dominant factor in determining seedling quality, with higher light intensities generally leading to seedlings that were more compact with greater dry mass accumulation. The inclusion of far-red wavelengths during propagation was also found to reduce the time to flower for pansy 'MatrixTM Yellow'. In Expt. 3, petunia 'Dreams Midnight' seedlings grown under LED SSL with a red:blue light ratio (%) of 90:10 and light intensity of 300 micromol&dot;m --2&dot;s--1 had greater dry mass accumulation and leaf area (LA) than those under the light ratio of 50:50 at the same light intensity. However, seedlings produced under a light ratio of 50:50 and light intensity of 300 micromol&dot;m--2&dot;s--1 displayed the highest Rubisco efficiency (ϕ), photosynthesis at operating Ci concentration (AOP), electron transport rate (ETR), and maximum net photosynthetic rate (An,max). A trend of increased dry mass accumulation and decreased ϕ for seedlings produced at a CO2 concentration of 900 micromol&dot;mol-1 was also observed compared to 450 micromol&dot;mol--1.
520 $a From results obtained in a commercial greenhouse, low-profile LEDs for greenhouse SL may be used as an alternative to traditional HPS lamps. However, the possibility of spectral manipulation in a greenhouse environment for desired growth responses appears to be limited when the relative contribution of SL from LEDs to DLI is low. For SSL production, while petunia 'Dreams Midnight' seedlings showed significantly higher ϕ, AOP, ETR, and A n,max under increased intensities of blue radiation, the increased LA observed under a higher percentage of red radiation ultimately led to increased light interception and greater dry mass accumulation. While the response is highly dependent on species and cultivar, the inclusion of far-red radiation under SSL may also be beneficial if accelerated flowering upon transplant is desired for plants with a long-day photoperiodic response. Additionally, while the CO2-enriched environment led to higher dry mass accumulation, acclimation responses, such as reduced ϕ, may limit potential gains from this input. The present research provides deeper insight into the morphological and physiological responses of bedding plant seedlings to light and CO 2 in controlled environments, and establishes a foundation for future research to investigate how to best optimize these inputs.
590 $a School code: 0183.
650 4 $a Horticulture. $3 555447
650 4 $a Plant sciences. $3 3173832
690 $a 0471
690 $a 0479
710 2 $a Purdue University. $b Horticulture. $3 2093040
773 0 $t Dissertation Abstracts International $g 79-10B(E).
790 $a 0183
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10790700