Effects of Nitrogen Rates on Nitrogen, Phosphorous, and Potassium Partitioning, Accumulation, and Use Efficiency in Seepage-irrigated Fresh Market Tomatoes

Ozores-Hampton, Mónica; Gioia, Francesco Di; Sato, Shuko; Simonne, Eric H.; Morgan, Kelly T.

doi:10.21273/hortsci.50.11.1636

Cited by 21 publications

(11 citation statements)

References 25 publications

(44 reference statements)

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“…However, in this study, the season lengths were similar (15 weeks after transplanting) during both the fall and spring. Similar season lengths were attributed to not only similar average daily air temperatures but also the relatively faster warming spring season than those previously reported by Ayankojo et al (2018) and Ozores-Hampton et al (2015) in a similar location. As with temperatures, the rainfall patterns also differed during both seasons (Fig.…”

Section: Stage Descriptionsupporting

confidence: 89%

“…After first harvest until last harvest usually cooler than that during fall (planting in early August). Therefore, the length of the tomato growing season during the spring could be 2 weeks or more longer than that during the fall (Ayankojo et al, 2018;Ozores-Hampton et al, 2015). However, in this study, the season lengths were similar (15 weeks after transplanting) during both the fall and spring.…”

Section: Stage Descriptionmentioning

confidence: 53%

“…This practice may enhance water conservation and may contribute to mitigating nutrient leaching early in the season. This practice could have important economic and ecological benefits in Florida because it is a common practice for most vegetable growers to apply 100% of the total season fertilizer before planting (Ozores-Hampton et al, 2015).…”

Section: Stage Descriptionmentioning

confidence: 99%

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Tomato Growth, Yield, and Root Development, Soil Nitrogen and Water Distribution as Affected by Nitrogen and Irrigation Rates on a Florida Sandy Soil

Ayankojo¹,

Morgan²,

Kadyampakeni³

et al. 2020

horts

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Effective nutrient and irrigation management practices are critical for optimum growth and yield in open-field fresh-market tomato production. Although nutrient and irrigation management practices have been well-studied for tomato production in Florida, more studies of the current highly efficient production systems would be considered essential. Therefore, a two-season (Fall 2016 and Spring 2017) study was conducted in Immokalee, FL, to evaluate the effects of the nitrogen (N) rates under different irrigation regimes and to determine the optimum N requirement for open-field fresh-market tomato production. To evaluate productivity, the study investigated the effects of N rates and irrigation regimes on plant and root growth, yield, and production efficiency of fresh-market tomato. The study demonstrated that deficit irrigation (DI) targeting 66% daily evapotranspiration (ET) replacement significantly increased tomato root growth compared with full irrigation (FI) at 100% ET. Similarly, DI application increased tomato growth early in the season compared with FI. Therefore, irrigation applications may be adjusted downward from FI, especially early during a wet season, thereby potentially improving irrigation water use efficiency (iWUE) and reducing leaching potential of Florida sandy soils. However, total marketable yield significantly increased under FI compared with DI. This suggests that although DI may increase early plant growth, the application of DI throughout the season may result in yield reduction. Although N application rates had no significant effects on biomass production, tomato marketable yield with an application rate of 134 kg·ha−1 N was significantly lower compared with other N application rates (179, 224, and 269 kg·ha−1). It was also observed that there were no significant yield benefits with N application rates higher than 179 kg·ha−1. During the fall, iWUE was higher under DI (33.57 kg·m−3) than under FI (25.57 kg·m−3); however, iWUE was similar for both irrigation treatments during spring (FI = 14.04 kg·m−3; DI = 15.29 kg·m−3). The N recovery (REC-N) rate was highest with 134 kg·ha−1 N; however, REC-N was similar with 179, 224, and 269 kg·ha−1 N rates during both fall and spring. Therefore, these study results could suggest that DI could be beneficial to tomato production only when applied during early growth stages, but not throughout the growing season. Both yield and efficiency results indicated that the optimum N requirement for open-field fresh-market tomato production in Florida may not exceed 179 kg·ha−1 N.

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Section: Stage Descriptionsupporting

confidence: 89%

Section: Stage Descriptionmentioning

confidence: 53%

Section: Stage Descriptionmentioning

confidence: 99%

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Tomato Growth, Yield, and Root Development, Soil Nitrogen and Water Distribution as Affected by Nitrogen and Irrigation Rates on a Florida Sandy Soil

Ayankojo¹,

Morgan²,

Kadyampakeni³

et al. 2020

horts

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“…Dry and finely ground microgreen tissue samples collected at harvest were analyzed to determine the concentration of P, K, Ca, Mg, Cu, Fe, and Zn using the dry ash combustion digestion method [63,64]. Analyses were performed at the University of Florida in the soil and plant analysis laboratory at the Southwest Research and Education Center, using an inductively coupled plasma atomic emission spectrometry (ICP-AES) system (OES Optima 7000 DV, PerkinElmer, Santa Clara, CA, USA).…”

Section: Mineral Analysismentioning

confidence: 99%

Zinc and Iron Agronomic Biofortification of Brassicaceae Microgreens

et al. 2019

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Insufficient or suboptimal dietary intake of iron (Fe) and zinc (Zn) represent a latent health issue affecting a large proportion of the global population, particularly among young children and women living in poor regions at high risk of malnutrition. Agronomic crop biofortification, which consists of increasing the accumulation of target nutrients in edible plant tissues through fertilization or other eliciting factors, has been proposed as a short-term approach to develop functional staple crops and vegetables to address micronutrient deficiency. The aim of the presented study was to evaluate the potential for biofortification of Brassicaceae microgreens through Zn and Fe enrichment. The effect of nutrient solutions supplemented with zinc sulfate (Exp-1; 0, 5, 10, 20 mg L −1 ) and iron sulfate (Exp-2; 0, 10, 20, 40 mg L −1 ) was tested on the growth, yield, and mineral concentration of arugula, red cabbage, and red mustard microgreens. Zn and Fe accumulation in all three species increased according to a quadratic model. However, significant interactions were observed between Zn or Fe level and the species examined, suggesting that the response to Zn and Fe enrichment was genotype specific. The application of Zn at 5 and 10 mg L −1 resulted in an increase in Zn concentration compared to the untreated control ranging from 75% to 281%, while solutions enriched with Fe at 10 and 20 mg L −1 increased Fe shoot concentration from 64% in arugula up to 278% in red cabbage. In conclusion, the tested Brassicaceae species grown in soilless systems are good targets to produce high quality Zn and Fe biofortified microgreens through the simple manipulation of nutrient solution composition.

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“…N has some negative consequences on the environment when misused, at the same time there are also economic implications that may affect crop productivity and the quality of the final product [ 16 , 17 ]. The application of fertilizer doses exceeding the crop needs may generate a situation where nitrates accumulate in the soil causing plant luxury consumption and low N use efficiency [ 11 , 18 , 19 ], while the excess of nitrates may be leached out of the root zone and contaminate the aquifer [ 16 , 17 ]. The common application worldwide of soluble N fertilizer via the irrigation water (fertigation) with frequent delivery of small N doses directly in the root zone has the potential to improve the matching between fertilizer application and crop N demand, thereby minimizing both risks of economic loss and environmental pollution [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Nitrogen Input on Chemical Profile and Bioactive Properties of Green- and Red-Colored Basil Cultivars

et al. 2020

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In the present study, three red-colored (Dark Opal, Basilico Rosso, and Red Basil) and one green-colored landrace (Mitikas) of basil (Ocimum basilicum L.) were grown under four nitrogen regimes, namely Control (no fertilizer added), 200 ppm, 400 ppm, and 600 ppm of nitrogen (N). Fresh yield varied depending on N input following a quadratic function in all four genotypes, and green basil performed better compared to the red cultivars. A significant interaction of genotype × N input was recorded for most of the chemical parameters measured. Tocopherols contents of leaves were consistently higher in plants that received 200 ppm of N and lower in those receiving 600 ppm of N, especially in Dark Opal and Red Basil cultivars. Polyunsaturated fatty acids (PUFA) were the major category of fatty acids and Red Basil had the lowest ratio of omega-6/omega 3 (0.29) and thus the best fatty acid profile. Polyphenols content was the highest in Red Basil and Dark Opal (25 mg/g of extract on average) and the lowest in Mitikas and decreased with increasing N input. Similarly, antioxidant activity was the highest in Dark Opal and Red Basil fertigated with 200 ppm of N, whereas all the leaf extracts tested had good antibacterial and antifungal activity. In conclusion, basil chemical and bioactive profile was significantly influenced by both genotype and N input. Red-colored basil, although less productive, had the best chemical profile, and moderate levels of N input may provide the best compromise between yield, nutritional value, and bioactivity for the species.

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Effects of Nitrogen Rates on Nitrogen, Phosphorous, and Potassium Partitioning, Accumulation, and Use Efficiency in Seepage-irrigated Fresh Market Tomatoes

Cited by 21 publications

References 25 publications

Tomato Growth, Yield, and Root Development, Soil Nitrogen and Water Distribution as Affected by Nitrogen and Irrigation Rates on a Florida Sandy Soil

Tomato Growth, Yield, and Root Development, Soil Nitrogen and Water Distribution as Affected by Nitrogen and Irrigation Rates on a Florida Sandy Soil

Zinc and Iron Agronomic Biofortification of Brassicaceae Microgreens

The Effect of Nitrogen Input on Chemical Profile and Bioactive Properties of Green- and Red-Colored Basil Cultivars

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