THE EFFECT OF LIGHT INTENSITY AND NITROGEN FERTILIZATION ON PLANT GROWTH AND LEAF QUALITY OF NGO GAI (ERYNGIUM FOETIDUM L.) IN MASSACHUSETTS

2004 ◽  
pp. 215-229 ◽  
Author(s):  
C.A. Casey ◽  
F.X. Mangan ◽  
S.J. Herbert ◽  
A.V. Barker ◽  
A.K. Carter
Keyword(s):  
Light Intensity ◽  
Plant Growth ◽  
Nitrogen Fertilization ◽  
Leaf Quality ◽  
Eryngium Foetidum ◽  
Effect Of Light

Effect of light intensity on grain quality of rice at different spike positions during grain-filling stage

2013 ◽  
Vol 21 (2) ◽  
pp. 164
Author(s):  
MingHui DONG ◽  
Feng HUI ◽  
JunRong GU ◽  
PeiFeng CHEN ◽  
DaiFeng YANG ◽  
...  
Keyword(s):  
Light Intensity ◽  
Grain Quality ◽  
Grain Filling ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
Effect Of Light

scholarly journals Effect of Light Regulation on the Quality of Sweetpotato Sprouts

HortScience ◽  
2021 ◽  
Vol 56 (3) ◽  
pp. 374-379
Author(s):  
Zunfu Lv ◽  
Simeng Zhang ◽  
Guoquan Lu
Keyword(s):  
Light Intensity ◽  
Light Regulation ◽  
High Light Intensity ◽  
Light Conditions ◽  
Low Light ◽  
Technical Parameters ◽  
Texture Characteristics ◽  
Set Up ◽  
Effect Of Light

Sweetpotato sprouts are buds or young shoots formed under dark or low-light conditions that can be eaten directly by people. This study was conducted to investigate the effects of light intensity and photoperiod on the quality and yield of sweetpotato sprouts and to identify the most suitable production conditions to provide a theoretical basis and technical parameters for the production of these vegetables. Four treatments involving different light intensities and photoperiods were set up: WL-1, WL-2, SL-1, and SL-2. The leaf color, nutritional quality, antioxidant capacity, texture characteristics, and yield of the sweetpotato sprouts were analyzed using Duncan’s new complex range method. The results demonstrated the following: 1) an increase in photoperiod improved leaf brightness and enhanced the appearance of the product, whereas light intensity had little effect on these parameters; and 2) low light intensity increased the yield of sweetpotato sprouts, whereas high light intensity reduced their yield. Under weak light conditions, the quality and yield of sweetpotato sprouts were improved, and their taste was unaffected. Therefore, the condition of 750 μmol·m−2·s−1 for 2 hours/day was chosen to produce crispy, high-quality, and high-yielding sweetpotato sprouts.

scholarly journals Effect of light intensities on the flowering and growth of spiny coriander (Eryngium foetidum L.)

1969 ◽  
Vol 75 (4) ◽  
pp. 383-389
Author(s):  
Luis R. Santiago-Santos ◽  
Arturo Cedeño-Maldonado
Keyword(s):  
Light Intensity ◽  
Block Design ◽  
Second Phase ◽  
Fresh Weight ◽  
Full Sunlight ◽  
Leaf Chlorophyll ◽  
Light Intensities ◽  
Eryngium Foetidum ◽  
Two Phases ◽  
Effect Of Light

An experiment was performed at the Alzamora Experiment Farm of the Mayagüez Campus, University of Puerto Rico, to evaluate the effect of light intensity on the growth and flowering of spiny coriander, Eryngium foetidum L. The study was divided in two phases: 1) the seedling phase, which lasted from seeding to the first harvest, and 2) the second phase, from the first to the second harvest. All plants were placed under cover of transparent polyethylene. Three of the treatments were covered by Saran plastic with different densities to reduce light intensity to 47, 63, and 73%. Treatments were arranged in a randomized complete block design with three replications. A significant delay in flowering was observed in plants grown at 63 and 73% shade. An increase was observed in fresh weight of leaves of plants grown at 63 and 73% shade levels vs those in full sunlight. Plants grown under shade had fewer inflorescences with lower fresh weight than plants grown under full sunlight. No significant differences were found on leof number between plants grown at different light intensities. Leaf chlorophyll content of spiny coriander increased in plants grown under low light intensities.

scholarly journals Daytime, Not Nighttime, Elevated Atmospheric Carbon Dioxide Exposure Improves Plant Growth and Leaf Quality of Mulberry (Morus alba L.) Seedlings

2021 ◽  
Vol 11 ◽  
Author(s):  
Songmei Shi ◽  
Yuling Qiu ◽  
Miao Wen ◽  
Xiao Xu ◽  
Xingshui Dong ◽  
...  
Keyword(s):  
Plant Growth ◽  
Atmospheric Carbon Dioxide ◽  
Plant Biomass ◽  
Soluble Sugar ◽  
Morus Alba ◽  
Mineral Nutrient ◽  
Leaf Quality ◽  
Leaf Yield ◽  
The Impact

Almost all elevated atmospheric CO2 concentrations (eCO2) studies have not addressed the potential responses of plant growth to different CO2 in daytime and nighttime. The present study was to determine the impact of daytime and/or nighttime eCO2 on growth and quality of mulberry (Morus alba L.), a perennial multipurpose cash plant. Six-month-old mulberry seedlings were hence grown in environmentally auto-controlled growth chambers under four CO2 concentrations: (1) ambient CO2 (ACO2, 410 μmol mol–1 daytime/460 μmol mol–1 nighttime), (2) sole daytime elevated CO2 (DeCO2, 710 μmol mol–1/460 μmol mol–1), (3) sole nighttime elevated CO2 (NeCO2, 410 μmol mol–1/760 μmol mol–1), and (4) continuous daytime and nighttime elevated CO2 (D + NeCO2, 710 μmol mol–1/760 μmol mol–1). Plant growth characteristics, nutrient uptake, and leaf quality were then examined after 120 days of CO2 exposure. Compared to control, DeCO2 and (D + N)eCO2 increased plant biomass production and thus the harvest of nutrients and accumulation of leaf carbohydrates (starch, soluble sugar, and fatty acid) and N-containing compounds (free amino acid and protein), though there were some decreases in the concentration of leaf N, P, Mg, Fe, and Zn. NeCO2 had no significant effects on leaf yield but an extent positive effect on leaf nutritional quality due to their concentration increase in leaf B, Cu, starch, and soluble sugar. Meanwhile, (D + N)eCO2 decreased mulberry leaf yield and harvest of nutritious compounds for silkworm when compared with DeCO2. The reason may be associated to N, P, Mg, Fe, and Zn that are closely related to leaf pigment and N metabolism. Therefore, the rational application of mineral nutrient (especially N, P, Fe, Mg, and Zn) fertilizers is important for a sustainable mulberry production under future atmosphere CO2 concentrations.

scholarly journals Effects of Individual and Simultaneous Selenium and Iodine Biofortification of Baby-Leaf Lettuce Plants Grown in Two Different Hydroponic Systems

Horticulturae ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 590
Author(s):  
Martina Puccinelli ◽  
Fernando Malorgio ◽  
Luca Incrocci ◽  
Irene Rosellini ◽  
Beatrice Pezzarossa
Keyword(s):  
Plant Growth ◽  
Sodium Selenate ◽  
System Quality ◽  
Leaf Quality ◽  
Post Harvest ◽  
Floating System ◽  
Hydroponic Systems ◽  
Leaf Lettuce ◽  
Global Population

The iodine (I) and selenium (Se) deficiencies affect approximately 30% and 15%, respectively, of the global population. The biofortification of vegetables is a valid way to increase the intake of iodine and selenium through the diet. This study was carried out on baby-leaf lettuce to investigate the effects on plant growth, leaf quality, and leaf I and Se accumulation of adding potassium iodide and sodium selenate, separately and simultaneously, to the nutrient solution in a floating system and aeroponics. The effect of I and Se biofortification on post-harvest quality of lettuce leaves was also evaluated. Our results evidenced that the Se and I treatments increased the content of the two microelements in lettuce leaves without any negative interactions in the plants, when applied either separately or simultaneously. Both hydroponic systems proved to be suitable for producing Se and/or I enriched lettuce. Biofortification with Se was more effective when performed in aeroponics, whereas I biofortification was more effective in the floating system. Quality of leaves during post-harvest storage was not affected by neither of the treatments. Lettuce leaves enriched with 13 µM Se and 5 µMI could be good dietary sources of Se and I without inducing toxic effects in humans.

scholarly journals Effect of light intensity after flowering on the productivity and quality of silage maize.

1982 ◽  
Vol 30 (4) ◽  
pp. 297-316
Author(s):  
P.C. Struik ◽  
B. Deinum
Keyword(s):  
Cell Wall ◽  
Light Intensity ◽  
Grain Yield ◽  
Grain Filling ◽  
Growing Season ◽  
Field Trials ◽  
Silage Maize ◽  
Effect Of Light

In field trials during 1977-9, maize was grown under shade conditions at various stages of development. Grain yield was correlated with irradiance received during grain filling and was increased by 10 kg/ha for every MJ/m2 at full light intensity when density was not limiting. In vitro OM digestibility and cell wall content decreased with shading during the latter part of the growing season. Shading also altered ensiling qualities. A hypothesis is formulated to account for the effect of shading on ear size, ear growth and leaf longevity in terms of the prompt effects of shading on root activity. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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