Influence of nitrogen source and rate on lettuce yield and quality

2021 ◽  
Author(s):  
Omid Zandvakili ◽  
Allen V Barker ◽  
Masoud Hashemi ◽  
Wesley R. Autio ◽  
Fatemeh Etemadi ◽  
...  
Keyword(s):  
Nitrogen Source ◽  
Yield And Quality ◽  
Lettuce Yield

scholarly journals Urea-Doped Calcium Phosphate Nanoparticles as Sustainable Nitrogen Nanofertilizers for Viticulture: Implications on Yield and Quality of Pinot Gris Grapevines

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1026
Author(s):  
Federica Gaiotti ◽  
Marco Lucchetta ◽  
Giacomo Rodegher ◽  
Daniel Lorenzoni ◽  
Edoardo Longo ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Nitrogen Source ◽  
Foliar Application ◽  
N Fertilization ◽  
Plant Nitrogen ◽  
Yield And Quality ◽  
Berry Quality ◽  
Potential Benefits ◽  
Calcium Phosphate Nanoparticles

In recent years, the application of nanotechnology for the development of new “smart fertilizers” is regarded as one of the most promising solutions for boosting a more sustainable and modern grapevine cultivation. Despite showing interesting potential benefits over conventional fertilization practices, the use of nanofertilizers in viticulture is still underexplored. In this work, we investigated the effectiveness of non-toxic calcium phosphate nanoparticles (Ca3(PO4)2∙nH2O) doped with urea (U-ACP) as a nitrogen source for grapevine fertilization. Plant tests were performed for two years (2019–2020) on potted adult Pinot gris cv. vines grown under semi-controlled conditions. Four fertilization treatments were compared: N1: commercial granular fertilization (45 kg N ha−1); N2: U-ACP applied in fertigation (36 kg N ha−1); N3: foliar application of U-ACP (36 kg N ha−1); C: control, receiving no N fertilization. Plant nitrogen status (SPAD), yield parameters as well as those of berry quality were analyzed. Results here presented clearly show the capability of vine plants to recognize and use the nitrogen supplied with U-ACP nanoparticles either when applied foliarly or to the soil. Moreover, all of the quali–quantitative parameters measured in vine plants fed with nanoparticles were perfectly comparable to those of plants grown in conventional condition, despite the restrained dosage of nitrogen applied with the nanoparticles. Therefore, these results provide both clear evidence of the efficacy of U-ACP nanoparticles as a nitrogen source and the basis for the development of alternative nitrogen fertilization strategies, optimizing the dosage/benefit ratio and being particularly interesting in a context of a more sustainable and modern viticulture.

scholarly journals Lettuce Yield and Quality When Grown in High Tunnel and Open-Field Production Systems Under Three Diverse Climates

2012 ◽  
Vol 22 (5) ◽  
pp. 659-668 ◽  
Author(s):  
Russell W. Wallace ◽  
Annette L. Wszelaki ◽  
Carol A. Miles ◽  
Jeremy S. Cowan ◽  
Jeffrey Martin ◽  
...  
Keyword(s):  
Open Field ◽  
Production Systems ◽  
Organic Production ◽  
High Tunnel ◽  
Mount Vernon ◽  
Yield And Quality ◽  
High Tunnels ◽  
Lettuce Yield ◽  
Field Plots ◽  
Field Production

Field studies were conducted during 2010 and 2011 in Knoxville, TN; Lubbock, TX; and Mount Vernon, WA; to compare high tunnel and open-field organic production systems for season extension and adverse climate protection on lettuce (Lactuca sativa) yield and quality. The climates of these locations are diverse and can be typified as hot and humid (Knoxville), hot and dry (Lubbock), and cool and humid (Mount Vernon). In both years, 6-week-old lettuce seedlings of ‘New Red Fire’ and ‘Green Star’ (leafy type), ‘Adriana’ and ‘Ermosa’ (butterhead type), and ‘Coastal Star’ and ‘Jericho’ (romaine type) were transplanted in the late winter or early spring into subplots covered with black plastic and grown to maturity (43 to 65 days). Lettuce harvest in Knoxville occurred at 50 to 62 days after transplanting (DAT), with open-field lettuce harvested an average of 9 days earlier compared with high tunnel plots both years (P > 0.0001). The earlier than anticipated harvests in the open-field in Knoxville in 2010 were due to lettuce bolting. In Lubbock, high tunnel lettuce was harvested an average 16 days earlier in 2010 compared with open-field lettuce (P > 0.0001), while in 2011, high temperatures and bolting required that open-field lettuce be harvested 4 days earlier than lettuce grown in high tunnels. On average, lettuce cultivars at Mount Vernon matured and were harvested 56 to 61 DAT in 2010 and 54 to 64 DAT in 2011 with no significant differences between high tunnel and open-field production systems. Total and marketable yields at Mount Vernon and Lubbock averaged across cultivars were comparable in both high tunnel and open-field plots. At Knoxville, although total yields were significantly higher (P > 0.0062) in high tunnels than open-field plots, incidence of insect, disease, and physiological damage in high tunnel plots reduced lettuce quality and marketable yield (P > 0.0002). Lettuce head length:diameter ratio (LDR) averaged across cultivars was equal between high tunnel and the open field at all three locations. High tunnel production systems offer greater control of environments suitable for lettuce production, especially in climates like Knoxville and Lubbock where later-planted open-field systems may be more susceptible to temperature swings that may affect lettuce quality. These results suggest that although high tunnel culture alone may influence lettuce yield and quality, regional climates likely play a critical role in determining the impact of these two production systems on marketable lettuce yields.

Mild drought stress has potential to improve lettuce yield and quality

2020 ◽  
Vol 272 ◽  
pp. 109578 ◽  
Author(s):  
Bruna Trindade Paim ◽  
Rosane Lopes Crizel ◽  
Siebeneichler Jéssica Tatiane ◽  
Vinícius Rodrigues Rodrigues ◽  
César Valmor Rombaldi ◽  
...  
Keyword(s):  
Drought Stress ◽  
Yield And Quality ◽  
Lettuce Yield ◽  
Mild Drought

NITROGEN SOURCE AFFECTS CRUNCHINESS, BUT NOT LETTUCE YIELD

2001 ◽  
Vol 24 (4-5) ◽  
pp. 743-751 ◽  
Author(s):  
Eric Simonne ◽  
Amy Simonne ◽  
Larry Wells
Keyword(s):  
Nitrogen Source ◽  
Lettuce Yield

scholarly journals Influence of Smooth Pigweed (Amaranthus hybridus) and Common Purslane (Portulaca oleracea) Densities on Lettuce Yields under Different Phosphorus Fertility Regimes

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 431A-431
Author(s):  
Bielinski M. Santos ◽  
Joan A. Dusky ◽  
William M. Stall ◽  
Donn G. Shilling ◽  
Thomas A. Bewick
Keyword(s):  
Critical Density ◽  
Field Trials ◽  
Organic Soils ◽  
Amaranthus Hybridus ◽  
Additional Advantage ◽  
Yield And Quality ◽  
Different Populations ◽  
Lettuce Yield ◽  
Common Purslane ◽  
Smooth Pigweed

The effects of different populations densities of smooth pigweed and common purslane were determined in field trials conducted in organic soils. `South Bay' lettuce was planted in twin rows on 90-cm planting beds. Weed densities used were 0, 2, 4, 8, and 16 weeds per 6 m of row (5.4 m2). Phosphorus (P) was applied broadcast (1200 kg P/ha) and banded 2 inches below each lettuce row (600 kg P/ha). Lettuce fresh weights were collected 8 weeks after emergence. Data collected indicated that P regime and density had significant effects on lettuce yield and quality. For both weeds, yield decreased as density increased. In all cases, lettuce showed greater yields at a given density when grown with P banded than when P was applied broadcast. Critical density for smooth pigweed for P broadcast was between 2 and 4 plants per 5.4 m2, whereas this critical density occurred between 8 and 16 plants per 5.4 m2 when P was banded. Yield reductions of up to 24.4% and 20.1% occurred at the highest smooth pigweed density for broadcast and banded P, respectively. Two common purslane plants per 5.4 m2 were enough to reduce lettuce yields. Banding P helped lettuce to produce significantly more within each common purslane density. Yield reductions of 47.8% and 44.3% occurred at the highest common purslane density for broadcast and banded P, respectively. Apparently, banding P gives an additional advantage to the crop against smooth pigweed and common purslane.

Tomato yield and quality as affected by nitrogen source and salinity

Agronomie ◽  
2003 ◽  
Vol 23 (3) ◽  
pp. 249-256 ◽  
Author(s):  
Pilar Flores ◽  
Josefa María Navarro ◽  
Micaela Carvajal ◽  
Antonio Cerdá ◽  
Vicente Martínez
Keyword(s):  
Nitrogen Source ◽  
Tomato Yield ◽  
Yield And Quality

scholarly journals Interaction of soil moisture and excess of boron and nitrogen on lettuce growth and quality

2013 ◽  
Vol 40 (No. 3) ◽  
pp. 119-125 ◽  
Author(s):  
G. Ouzounidou ◽  
C. Paschalidis ◽  
D. Petropoulos ◽  
A. Koriki ◽  
P. Zamanidis ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Nutritional Value ◽  
Negative Influence ◽  
N Fertilization ◽  
Boron Toxicity ◽  
Simultaneous Application ◽  
Water Capacity ◽  
Yield And Quality ◽  
Lettuce Growth ◽  
Lettuce Yield

A study of the effects of boron (10 mg/kg as H<sub>3</sub>BO<sub>3</sub>) and nitrogen (0-0.15-0.30-0.45-0.60 g/kg) fertilization in combination with soil water capacity (40% and 70%) on lettuce growth and nutritional value was performed. The effects of the simultaneous application of N and B depend on the soil moisture, since lower water in the soil reduced lettuce growth and quality. Linear correlation was found between N fertilization and lettuce yield and quality at the two water soil capacities. Only when N fertilization exceeded 0.45 g/kg the fresh and dry biomass, photosynthesis, sugars and ascorbic acid showed negative influence as compared to the control. The toxic effects of B in lettuce cultivation were alleviated by the presence of high N doses, since a competition between N and B ions was revealed. Overall, the management of irrigation and N fertilization is very important in soils with boron toxicity. &nbsp; &nbsp;

scholarly journals The impact of different growth media and ammonium-nitrate ratio on yield and nitrate accumulation in lettuce (Lactuca sativa var. longifolia)

2021 ◽  
Vol 49 (4) ◽  
pp. 12540
Author(s):  
Selçuk SÖYLEMEZ
Keyword(s):  
Nutrient Solution ◽  
Root Traits ◽  
Growth Media ◽  
Nitrate Accumulation ◽  
Yield And Quality ◽  
Head Weight ◽  
Growth Attributes ◽  
Lettuce Yield ◽  
The Impact

Ammonium (NH4+) to nitrate (NO3-) ratio and growth media significantly alter plant development and NO3- accumulation in lettuce. Nitrate accumulation is regarded harmful for environment and human health. The quality of lettuce is assessed by NO3-concentration, size, and weight. This study determined the impact of five different growth media (cocopeat, peat, bark, perlite and rockwool) and four different NH4+:NO3- ratios (0:100, 20:80, 40:60 and 60:40) on NO3- accumulation in lettuce, yield, and several growth attributes. The experimentation was conducted according to open feeding system of soilless agriculture. The ‘Cosmos’ variety of lettuce was used as experimental material in the study. Growth mediums and NH4+:NO3- ratios significantly altered NO3- accumulation, head, leaf, stem and root traits. The results revealed that instead of growing lettuce with NO3- only in peat and rockwool, addition of NH4+ (20:80 of NH4+:NO3-) into nutrient solution increased head weight. While head weight increased in perlite medium with the addition of NH4+, it decreased in cocopeat and bark media. It is concluded that growth media and NH4+:NO3- ratios pose significant impacts on NO3- accumulation in leaf and that the increase in NH4+ ratio decreased NO3- accumulation in all growing media. Therefore, it is recommended that NH4+ should be added in the nutrient solution to decrease NO3- accumulation, which will ultimately improve yield and quality of lettuce.

scholarly journals The Effect of Environment and Nutrients on Hydroponic Lettuce Yield, Quality, and Phytonutrients

Horticulturae ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 48 ◽  
Author(s):  
William Sublett ◽  
T. Barickman ◽  
Carl Sams
Keyword(s):  
Nutrient Solution ◽  
Growing Season ◽  
Nutrient Concentrations ◽  
Eastern United States ◽  
Marketable Yield ◽  
Greenhouse Production ◽  
Growing Seasons ◽  
Yield And Quality ◽  
Lettuce Yield ◽  
Leaf Lettuce

A study was conducted with green and red-leaf lettuce cultivars grown in a deep-water culture production system. Plants were seeded in rockwool and germinated under greenhouse conditions at 25/20 °C (day/night) for 21 days before transplanting. The experimental design was a randomized complete block with a 2 × 3 factorial arrangement of cultivar and nutrient treatments that consisted of six replications. Treatments consisted of two lettuce genotypes, (1) green (Winter Density) and (2) red (Rhazes), and three nutrient treatments containing electroconductivity (EC) levels of (1) 1.0; (2) 2.0; and (3) 4.0 mS·cm−1. After 50 days, plants were harvested, processed, and analyzed to determine marketable yield, biomass, plant height, stem diameter, phenolics, and elemental nutrient concentrations. An interaction between growing season and lettuce cultivar was the predominant factor influencing yield, biomass, and quality. Nutrient solution EC treatment significantly affected biomass and water content. EC treatments significantly impacted concentrations of 3-O-glucoside and uptake of phosphorous, potassium, iron, boron, zinc, and molybdenum. Effects of growing season and cultivar on leafy lettuce yield and quality were more pronounced than the effect of nutrient solution EC treatment. Thus, greenhouse production of green and red-leaf lettuce cultivars in the south-eastern United States should be conducted in the spring and fall growing seasons with elevated nutrient solution EC of ≈4.0 mS·cm−1 to maximize yield and quality.

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