scholarly journals PHOTOPERIOD/LIGHT INTENSITY INTERACTIONS ON GROWTH OF TWO SWEETPOTATO CULTIVARS IN NFT

HortScience ◽  
1993 ◽  
Vol 28 (4) ◽  
pp. 267D-267
Author(s):  
S. Burrell ◽  
D. Mortley ◽  
P. Loretan ◽  
L. Garner ◽  
A. Trotman ◽  
...  
Keyword(s):  
Light Intensity ◽  
Ipomoea Batatas ◽  
Block Design ◽  
Dry Weight ◽  
Storage Root ◽  
Fresh Weight ◽  
Fibrous Root ◽  
Nutrient Film Technique ◽  
Randomized Complete Block Design ◽  
Lower Light

The effects of photoperiod and light intensity on two sweetpotato cultivars [Ipomoea batatas (L.) Lam] were evaluated in growth chambers. Vine cuttings of `TI-155' and `GA Jet' were grown using nutrient film technique (NFT) in a modified half Hoaglands solution with a 1:2.4 N:K ratio in channels (0.15×0.15×1.2 m). Plants were exposed to 9:600 or 18:300 umols m-2 s-1 photoperiod:light intensity treatments in a randomized complete block design with two replications. Temperature was set at 28:22 light:dark and RH was 70%. Storage root fresh and dry weights and fibrous root dry weight for both cultivars were significantly higher for plants exposed to longer photoperiod and lower light intensity than for those at a shorter photoperiod and higher light intensity. Foliage fresh weight for TI-155' was higher at 18:300 photoperiod:light intensity but dry weights were similar. Foliage fresh and dry weights for `GA Jet' and number of storagage roots/plant for both cultivars were similar regardless of treatments.

scholarly journals RESPONSE OF THREE SWEET-POTATO CULTIVARS GROWN IN NFT TO DIFFERENT IRRADIANCE LEVELS

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 731e-731
Author(s):  
S. Burrell ◽  
D. Mortley ◽  
P. Loretan ◽  
A.A Trotman ◽  
P. P David ◽  
...  
Keyword(s):  
Light Intensity ◽  
Ipomoea Batatas ◽  
Life Support ◽  
Block Design ◽  
Storage Roots ◽  
Light Levels ◽  
Nutrient Film Technique ◽  
Long Duration ◽  
Randomized Complete Block Design ◽  
Effect Of Light

The effects of light intensity on three sweetpotato cultivars [Ipomoea batatas (L.) Lam] were evaluated in growth chambers, as part of NASA's Closed Ecological Life Support Systems (CELSS) program for long duration space missions. Vine cuttings of `TI-155', `GA Jet', and TUJ1 were grown using nutrient film technique (NFT) in a modified half Hoagland's solution with a 1:2.4 N:K ratio in channels (0.15×0.15×1.2 m). Plants were exposed to irradiance levels of 360 or 720 umols m-2s-1 with an 18/6 photoperiod in a randomized complete block design with two replications. Temperature was set at 28:22 lightdark and RH was 70%. Differences in plant response to were more related to cultivars than the effect of light intensity. Storage root number (8) fresh, (786 g/plant) and dry weights (139 g/plant) were highest for `TI-155' while foliage fresh and dry weights were highest for `TUJ1' when averaged across light levels. TI-155' (921 g/plant) and `GA Jet' (538 g/plant) produced greater yields at higher irradiance. `TUJ1' produced a higher yield (438 g/plant at the lower intensity compared to 219 (g/plant) at the higher intensity, suggesting this cultivar could produce storage roots in similar conditions in a CELSS.

scholarly journals ALTERING NUTRIENT SOLUTION N:K RATIO TO INCREASE YIELDS OF SWEETPOTATO GROWN IN NFT

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 731b-731 ◽  
Author(s):  
D.G. Mortley ◽  
P A. Loretan ◽  
A.A Trotman ◽  
P. P David ◽  
L.C Garner ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Ipomoea Batatas ◽  
Life Support ◽  
Block Design ◽  
Dry Weight ◽  
Culture Solution ◽  
Fibrous Root ◽  
Storage Roots ◽  
Nutrient Film Technique ◽  
Long Duration

The effects of altering, nutrient solution N:K ratio on growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse, as part of NASA's Closed Ecological Life Support Systems (CELSS) program for long duration space missions. Vine cuttings of `TI-155', were grown using nutrient film technique (NFT) in a modified half Hoagland's solution in channels (0.15×0.15×1.2 m). Plants were grown for 42 days in a culture solution in which N was doubled (6 mM) in order to accelerate foliage growth after which treatment N:K ratios of 1:2.4, (control) 1:4.8, and 1:7.2 were initiated. A randomized complete block design with 4 replications was used. The number of storage roots/plant increased linearly as K was increased in the solution. Storage root fresh and dry weights, growth rate (g m-2 d-1), fibrous root dry weight, foliage fresh and dry weights, and edible biomass index (root mass/total plant mass), though not significant all increased as K was increased in the nutrient solution. Nutrient solution analyses showed that K uptake was greatest in plants at the highest K level, while nitrate uptake was steady over the duration of crop growth regardless of treatments.

scholarly journals EFFECTS OF MYCORRHIZAE, MEDIA AND CONTAINER TYPE ON THE GROWTH OF GREEN PEPPER AND LETTUCE TRANSPLANTS

HortScience ◽  
1991 ◽  
Vol 26 (6) ◽  
pp. 709B-709 ◽  
Author(s):  
Ray A. Watson ◽  
Katrine A. Stewart ◽  
Valentin Furlan
Keyword(s):  
Plant Growth ◽  
Leaf Area ◽  
Block Design ◽  
Dry Weight ◽  
The Other ◽  
Fresh Weight ◽  
Green Pepper ◽  
Shoot Dry Weight ◽  
Randomized Complete Block Design ◽  
Container Type

The effects of two mycorrhizal species (Glomus versiforme and Glomus intraradix) and a control on the growth of green pepper, Capsicum annuum, and lettuce, Lactuca sativa, seedlings have been evaluated using four types of growing media (Peatwool, Fafard bulk mix. Cornell mix and a compost based mix) and two types of containers, Cell Packs (125 cc volume) and Pro-Trays (65 cc volume) for green pepper and Cell Packs (125 cc volume) and Plug Flats (33 cc volume) for lettuce. The experiments were split plot randomized Complete block design with 6 blocks (lettuce) and 4 blocks (pepper). Seeds were sown directly into the containers of mycorrhizal inoculated media. All treatments received the same fertilizer regime. Cell volume had no significant effects on green pepper fresh weight, dry weight, stem diameter, leaf area or leaf number but the lettuce Cell Pack plants had significantly higher fresh and dry weights, more leaves and higher leaf area. The Fafard Bulk and the Compost mix gave significantly higher fresh and dry weights than did the other two media for both green pepper and lettuce. Mycorrhizal species did not influence plant growth with the exception of leaf area in green peppers and shoot dry weight in lettuce.

scholarly journals Effect of Natural and Synthetic Mulches on Yield and Yield Attributing Parameters of Chili (Capsicum annum L. Solanaceae)

2021 ◽  
pp. 29-37
Author(s):  
Rajesh Neupane ◽  
Subin Babu Neupane ◽  
Bhawana Acharya ◽  
Shikshya Parajuli ◽  
Nischal Oli ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Soil Temperature ◽  
Field Study ◽  
Block Design ◽  
Dry Weight ◽  
Fresh Weight ◽  
Transparent Plastic ◽  
Capsicum Annum ◽  
Randomized Complete Block Design ◽  
Post Hoc

Aims: Production of chili (Capsicum annuum Linnaeus; Solanaceae) in rain-fed regions of Nepal during the winter is constrained by the limited availability of soil moisture. Mulching has been a proven tool to conserve soil moisture and enhance yield. A field study was conducted in the winter of 2019 to identify the most suitable mulch that enhances the yield and yield attributing parameters of chili. Study Design: Seven treatments with three replications were evaluated under the randomized complete block design. Among the treatments, rice straw (5 kg/plot) and water reed (5 kg/plot) were used as natural mulches. While, plastic mulches: transparent (25 µ), silver (25 µ), black (25 µ), and black thick (50 µ) (double thickness) were used as synthetic mulches. Only soil with no mulch was the control. Place and Duration of Study: The study was conducted at Bangau, Dang, Nepal from November 2019 to May 2020. Methodology: We measured soil temperature at 10 cm depth using soil thermometer, and calculated soil moisture through oven dry method. Similarly, weight of ten fresh and ten dry fruits was recorded from each plot using an electronic scale. Number of fruits per plant was also counted. All the data were analyzed using ANOVA and means were separated following a post hoc test. Results: The highest soil moisture (18.38%), number of fruits per plant (24.91), fruit fresh weight per ten fruits (59.86 g), and fruit dry weight per ten fruits (14.65 g) were recorded in black thick plastic mulched plots. Furthermore, the lowest fresh weed weight (95.30 g) was also measured in black thick plastic mulched plots. Whereas, the highest soil temperature (18.92°C) was recorded in transparent plastic mulched plots. Conclusion: This study concludes black thick plastic as the most effective among the treatments tested in this study in enhancing yield and yield attributing parameters of chili.

scholarly journals Effect of Different Rates of N and Intrarow Spacing on Growth Performance of Lettuce (Lactuca sativa L.) in Gurage Zone, Wolkite University, Ethiopia

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Bewuket Gashaw ◽  
Shewaye Haile
Keyword(s):  
Block Design ◽  
Maximum Yield ◽  
Dry Weight ◽  
Optimum Level ◽  
Plant Spacing ◽  
Fresh Weight ◽  
Randomized Complete Block Design ◽  
Main Effect ◽  
Demonstration Site ◽  
Four Levels

A field experiment was conducted in Wolkite University, Horticulture department practical demonstration site, from February to June 2019 with the objective of determining the optimum level of N and intrarow spacing for better growth of lettuce. The experiment consisted of four levels of N (N0 (0 kg/ha), N1 (50 kg/ha), N2 (100 kg/ha), and N3 (150 kg/ha)) and three levels of intrarow spacing (S1 (15 × 30 cm), S2 (20 × 30 cm), and S3 (25 × 30 cm)). The interrow spacing was maintained as 30 cm. The experiment was laid out in 3 × 4 factorial arrangement in a randomized complete block design (RCBD) and replicated three times. The main effect of nitrogen resulted maximum yield (9.45 ton/ha), dry weight per plant (28.75 g), and fresh weight per plant (57.57 g) which were recorded by the application of 150 kg/ha nitrogen. Likewise, the main effect of intrarow spacing gave maximum yield (8.01 ton/ha), dry weight per plant (21.31 g), and fresh weight per plant (59.15 g) from 25 × 30 cm plant spacing. For interaction effect, the highest yield (10.38 ton/ha), dry weight per plant (50.96 g), and fresh weight per plant (77.88 g) was found from N3S3 (150 kg/ha N and 25 × 30 cm plant spacing). Therefore, in the study, area using 150 kg/ha urea with 25 × 30 cm plant spacing could be advisable for optimum lettuce production.

scholarly journals Effects of cowdung and potassium on growth and yield of Kohlrabi

2012 ◽  
Vol 10 (1) ◽  
pp. 27-32 ◽  
Author(s):  
J Sultana ◽  
M A Siddique ◽  
M H A Rashid
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Dry Weight ◽  
Growth And Yield ◽  
Control Treatment ◽  
Fresh Weight ◽  
Treatment Combination ◽  
Randomized Complete Block Design ◽  
Number Of Leaves ◽  
Four Levels

An experiment was carried out at the Horticulture Farm of the Bangladesh Agricultural University, Mymensingh during  the period from November 2010 to January 2011 to study the effects of cowdung and potassium on growth and yield  of Kohlrabi. The experiment consisted of three levels of cowdung (0, 20 and 40 t/ha) and four levels of potassium (0,  20, 50, 80 kg /ha). The experiment was laid out in randomized complete block design with three replications. All the  parameters were significantly influenced by application of cowdung and potassium. The highest plant height (44.65  cm), number of leaves per plant (12.11), length of largest leaf (37.54 cm), and breadth of largest leaf (18.66 cm) were  obtained from the highest dose of cowdung and potassium applied (40 t cowdung + 80 kg K/ha) while the lowest  plant height (33.64 cm), number of leaves (9.01), length of largest leaf (27.94 cm), and breadth of largest leaf (11.00  cm) were obtained from control treatment combination. The highest fresh weight of leaves (49.33 g), fresh weight of  knob (328.66 g) and fresh weight of roots (66.55 g) per plant were also recorded under the treatment combination of  40 t cowdung + 80 kg K/ha, while the lowest fresh weight of leaves (22.11 g), fresh weight of knob (136.00 g) and  fresh weight of roots (23.33 g) were obtained from control treatment combination. Similarly, the dry weight of leaves  (19.34%), knob (15.19%) and roots (32.75%) were highest under the same treatment combination of 40 t cowdung +  80 kg K/ha and the lowest dry weight of leaves (11.71%), dry weight of knob (7.38%) and dry weight of roots  (15.29%) were obtained from control treatment combination C0K0. The marketable yields of knob per plot (7.86 kg)  and per hectare (39.58 tons) were also the highest under the treatment combination 40 t cowdung/ha and 80 kg  potassium per hectare.   DOI: http://dx.doi.org/10.3329/jbau.v10i1.12035   J. Bangladesh Agril. Univ. 10(1): 27–32, 2012  

scholarly journals RESPONSE OF ABELMOSCHUS ESCULENTUS L. FORINOCULATION WITH MYCORRHIZAE AND FOLAIR APPLICATION WITH BIO-STIMULATORS AND EFFECT ON VEGETATIVE GROWTH CHARACTERS

2020 ◽  
Vol 51 (Special) ◽  
Author(s):  
AL-Samarai & et al.
Keyword(s):  
Block Design ◽  
Dry Weight ◽  
Fresh Weight ◽  
Agricultural Engineering ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Number Of Leaves ◽  
The Mean ◽  
Growth Characters ◽  
Relative Chlorophyll Content

The current study  was carried out at the Fields belongs of Horticulture  Department, Collage of Agricultural Engineering Science, University of  Baghdad, Al-Jadiriyah for the spring season 2016 -2017 to study the effect for  inoculation mycorrhizae and  folair application  with bio stimulators and their interaction in the growth characters of  (local okra  ptera). A factorial experiment  (2  in randomized complete block design (RCBD), the experiment included (12) treatment  Distributed  in three  replicates. The three factors used in this experiment included . The inoculation with control (C) Mycorrhizae  ( M ) , Biozyme  (B ) ( B1 2cm3.L-1), ( B2 4cm1-.L-1) , Phosphalas (P) (P 2cm3.L-1),  ( M + B1), ( M + B2), (P + M ), ( P + B1), (P + B2), ( M + P + B1), ( M + P + B2). The data were analyzed according to the design followed and the mean was tested by the lowest significant difference at 0.05%. The results showed a significant increase in the studied traits .  The results showed that the three factors and their interactions had significant effects on most of the growth characters measured. The inoculation with the Mycorrhizae  , Biozyme  and  Phosphalas was superior in giving higher values of  plant height  (M1B2P1) 120.00 cm,  Main branches number  per plant 13.00,  number of  leaves 197.0  (Leaf .plant -1),  leaf area  394.0 (dcm2. Leaf ),  fresh weight  of vegetative 3200 (kg. plant-1)  Dry weight of vegetative 209.0 ( g . plant-1), number of  nodules on the stem 41.33  (nod. plant -1),  relative chlorophyll content  (SAPD) respectively. The M1B2P0 combination treatment recorded the highest values of  secondary branches number  per plant 10.33. The M1B1P0 treatment recorded the highest values of diameter of stem 4.03 (cm).   

Effect of different levels of sulphur and boron on growth and nodulation of garden pea (Pisum sativum L.)

2016 ◽  
Author(s):  
F. A. Parry ◽  
M. A. Chattoo ◽  
M. Magray ◽  
S. A. Ganie ◽  
Z. M. Dar ◽  
...  
Keyword(s):  
Marked Improvement ◽  
Block Design ◽  
Dry Weight ◽  
Fresh Weight ◽  
Garden Pea ◽  
Combined Application ◽  
Randomized Complete Block Design ◽  
Four Levels ◽  
Different Levels ◽  
Number Of Branches

A field experimental was conducted at Division of Vegetable Science, SKUAST-Kashmir, Shalimar during rabi 2009-2010 and 2010-2011 in randomized complete block design with sixteen treatment combinations consisting four levels of sulphur (0, 15, 30 and 45 kg S ha-1) and boron (0, 1, 2 and 3 kg B ha-1) replicated three times. Application of 30 kg S ha-1 showed marked improvement in growth and nodulation parameters in pea. Increasing dose of boron in the absence of sulphur up to 3kg ha-1 resulted marked improvement in growth and nodulation in garden pea. Higher values of plant height, number of branches plant-1, fresh weight plant-1 , dry weight plant-1, number of nodules plant-1, fresh weight of nodules plant-1ha- and dry weight of nodules plant -1 were noticed with combined application of 30 kg S + 2 kg B ha-1.

scholarly journals Propagation of Aloysia citriodora Palau Using Different Cutting Types under Light Intensity

2020 ◽  
pp. 1-9
Author(s):  
Orivaldo Benedito da Silva ◽  
Ademir Goelzer ◽  
Cleberton Correia Santos ◽  
Elissandra Pacito Torales ◽  
Néstor Antonio Heredia Zárate ◽  
...  
Keyword(s):  
Light Intensity ◽  
Vegetative Propagation ◽  
Block Design ◽  
Survival Rates ◽  
Dry Mass ◽  
Light Conditions ◽  
Fresh Weight ◽  
Mato Grosso ◽  
Randomized Complete Block Design ◽  
Mato Grosso Do Sul

Aims: The aim of this study was to evaluate the effect of types of cuttings and light intensity on cidró vegetative propagation. Place and Duration of Study: Medicinal Plants Garden, Federal University of Grande Dourados (UFGD), Dourados, state of Mato Grosso do Sul, Brazil, September to November 2016. Methodology: The experiment was carried out under two light conditions (shaded and full light), evaluating three types of cuttings (softwood, semi-hardwood and hardwood). Experimental design was a 2 x 3 factorial randomized complete block design (RCBD) with four replications. Results: Hardwood cuttings showed the highest survival rates (86% and 82%), regardless of light. Highest fresh weight (0.6062 g plant-1) and dry mass (0.2987 g plant-1) with a leaf of 44.57 cm2 were from hardwood cuttings, regardless of the light, while the longest root length were those of softwood cuttings under full light. Physiological indices varied as a function of light intensity, The highest values of leaf area ratio (46.11 cm2 g-1) and specific leaf mass (0.0037 g cm-2) occurred in cuttings under full light. Conclusion: The vegetative propagation of cidró can be carried out using the hardwood portion of the cutting branch, under full light.

scholarly journals Sequential path analysis for determining interrelationships between yield and related traits in tobacco (Nicotiana tabacum L.) under normal and abiotic stress conditions

Genetika ◽  
2014 ◽  
Vol 46 (3) ◽  
pp. 815-829
Author(s):  
Mahdi Bayat ◽  
Reza Darvishzadeh ◽  
Farough Soleimani ◽  
Seyyed Alavi
Keyword(s):  
Abiotic Stress ◽  
Stress Condition ◽  
Block Design ◽  
Dry Weight ◽  
Stress Conditions ◽  
Fresh Weight ◽  
First Order ◽  
Randomized Complete Block Design ◽  
The Mean ◽  
First Order Variables

In the present work the relationships between yield and its related traits were investigated in tobacco genotypes under normal and abiotic stress conditions (Orobanche aegyptiaca weed) at Urmia Tobacco Research Centre, Iran, during 2006-2009 cropping seasons. The experimental design was a randomized complete block design (RCBD) with three replications in each condition every year. Analysis of variance revealed extent genetic variability among the genotypes for most of the traits studied. In comparison with normal condition, the mean value of studied traits decreased in stress condition. LAI and FD showed the maximum and minimum diminution in the mean values under stress condition compared to normal one so known as more sensitive and more tolerant traits, respectively. Based on CV values, the traits FD and DLYP showed the minimum and maximum variation among traits in both normal and stress conditions. Correlation analysis revealed significant and positive correlations between DLYP with all studied traits in both normal and stress conditions. Path analysis detected the traits including biomass, APDW and DWR as the first-order variables at normal condition and biomass, APDW, DWR and harvest index as the first-order variables under abiotic stress condition. Based on results, the traits such as biomass, APDW, DWR detected as more important factors in both conditions can be used in tobacco breeding programs for increasing yield. Abbreviation: aerial part fresh weight without leaves weight (APFW), aerial part dry weight without leaves weight (APDW), biomass (BIO), coefficient of variation (CV), dry weight of root (DWR), flowering date (FD), fresh weight of leaf (FWL), fresh weight of root (FWR), harvest index (HI), leaf area index (LAI), dry leaf yield per plant (DLYP), number of leaf (NL), plant height (PH), randomized complete block design (RCBD), standard deviation (Std).

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