Use of nondestructive sensors to assess nitrogen status in potted poinsettia (Euphorbia pulcherrima L. (Willd. ex Klotzsch)) production

Basyouni, Rania; Dunn, Bruce L.; Goad, Carla L.

doi:10.1016/j.scienta.2015.05.011

Cited by 24 publications

(26 citation statements)

References 15 publications

(14 reference statements)

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“…All sensor readings followed positive quadratic and linear trends as fertilizer rates increased, which corresponds with similar findings in other ornamental crops like dianthus, vinca (Catharanthus roseus (L.) G. Don), zinnia, geranium, and poinsettia (Schuch et al 1996;Altland et al 2002;Khan et al 2004;Smith et al 2004;Wang et al 2012aWang et al , 2012bBasyouni et al 2015). The linear response in all sensor readings across treatments over time can be attributed to the increased nutrient release from the CRF granules with increased temperatures (temperature data not shown), and irrigation frequency (Tables 1-3).…”

Section: Discussionsupporting

confidence: 84%

“…Zhu et al (2012) showed that atLEAF readings were strongly correlated with the SPAD meter readings in five crop species: canola (Brassica napus L.), wheat, barley (Hordeum vulgare L.), potato, and corn. The atLEAF chlorophyll meter proved to correlate with poinsettia in greenhouse settings (Basyouni et al 2015). No previous use has been reported for the atLEAF chlorophyll meter to assess nutrient status in dianthus.…”

Section: Introductionmentioning

confidence: 96%

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Use of Nondestructive Sensors to Assess Nitrogen Status in Potted Dianthus (Dianthus chinensis L.) Production

2016

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Optical sensors are a fast and nondestructive new technology used to estimate plant chlorophyll content by measuring leaf reflectance or absorbance of light. The objective of this study was to evaluate the reliability of normalized difference vegetative index (NDVI) values calculated by the GreenSeeker™ hand held sensor as an indirect indicator of dianthus (Dianthus chinensis L.) N status, and investigate nutrient supplementation on deficient 'Telstar™ White' and 'Telstar™ Red Picotee' plants. Pots were supplemented with 0, 5, 10, 15, and 20 g of 15N-3.9P-10K controlled release fertilizer (CRF). Soil and plant analysis development (SPAD) chlorophyll meter, GreenSeeker™ NDVI sensor, and atLEAF meter readings were recorded for four consecutive weeks. At 49 d after planting (DAP), the 0 and 5 g treatments were found deficient and half of the pots were supplemented with extra fertilizer for treatment correction (C 0 and C 5, respectively). The SPAD and atLEAF readings showed stronger correlation to actual leaf N concentration compared with the GreenSeeker™. The GreenSeeker™ readings were less correlated with leaf N concentration at early stages of establishment due to the plants' small size and background noise, as well as at later stages of establishment due to anthesis. Dianthus quality responses generally increased as fertilizer rates increased. The additional correction treatment showed a significant improvement in C 5 and no significant improvement on C 0, indicating that the correction treatment was beneficial for dianthus when initial amount of fertilizer was applied.

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Section: Discussionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 96%

Use of Nondestructive Sensors to Assess Nitrogen Status in Potted Dianthus (Dianthus chinensis L.) Production

2016

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“…4). SPAD is directly related to leaf thickness, nitrogen concentration, chlorophyll level, and water status (Basyouni et al, 2015;Martínez and Guiamet, 2004). In our study, the higher SPAD with NR-SMC for lantana could have been related to the higher leaf nitrogen concentration associated with higher-frequency watering and, therefore, fertilization with each irrigation event because no difference in leaf thickness was detected in any of the cultivars (data not shown).…”

Section: Resultsmentioning

confidence: 56%

Growth, Quality, and Economic Value Responses of Bedding Plants to Reduced Water Usage

Guo¹,

Starman²,

Hall³

2019

horts

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This study analyzed the effects of two ranges of drying down of substrate moisture content (SMC) before re-watering on plant growth and development, postproduction quality, and economic value of bedding plants grown in 1.67-L containers during greenhouse production. The two SMC treatments were wide-range (WR) SMC (WR-SMC) for dry-down from container capacity (CC) of 54% SMC dried down to 20% SMC or narrow-range (NR) SMC (NR-SMC) for dry-down from CC of 54% SMC dried down to 40% SMC. Six bedding plant cultivars were used [Solenostemon scutellarioides ‘French Quarter’ (coleus); Petunia ×hybrida ‘Colorworks Pink Radiance’ (petunia); Lantana camara ‘Lucky Flame’ (lantana); Impatiens ×hybrida ‘Sunpatiens Compact Hot Coral’ (SCC); ‘Sunpatiens Spreading Lavender’ (SSL) (impatiens); and Salvia splendens ‘Red Hot Sally II’ (salvia)]. Shoot dry weight was reduced with WR-SMC on petunia, lantana, impatiens SCC, and salvia at the end of production. With WR-SMC, the petunia and impatiens SCC root ball coverage percentages were greater on the bottom of the container, whereas those of impatiens SSL and salvia were reduced. The WR-SMC increased petunia postproduction quality by increasing the flower number. Lantana and impatiens SCC inflorescence/flower and/or bud number were reduced with WR-SMC. The impatiens SSL flower number was unaffected by SMC treatment. Salvia grown with WR-SMC had increased postproduction quality. WR-SMC reduced postproduction water potential in petunia, lantana, and coleus, suggesting that plants with WR-SMC during production were acclimated to reduced irrigation administered during postproduction. WR-SMC saved labor due to less frequent watering and overhead-associated costs due to reduced bench space, with the exception of coleus and impatiens SSL, which used the same bench space as NR-SMC. Considering production and/or postproduction quality, using WR-SMC during greenhouse production is beneficial as an irrigation method for coleus, petunia, impatiens SSL, and salvia, but not for impatiens SCC or lantana grown in 1.67-L containers.

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“…Tissue testing, such as petiole nitrate concentration, assessed by selective electrodes (Vitosh and Silva 1994;Sims et al 1995) or test strips (Sims et al 1995;Rodrigues 2004;Rodrigues et al 2005) and also chlorophyll measurements through portable tools (Schepers et al 1992; Rodrigues et al 2006;Arrobas, Aguiar, and Rodrigues 2016) may be valuable alternatives. The reflectance properties of the canopy, assessed by handheld spectroradiometers (Basyouni, Dunn, and Goad 2015;Dunn, Shrestha, and Goad 2016), imagery from satellite sensors (Gitelson, Peng, and Huemmrich 2014;Zhang et al 2014) or digital cameras (Hardin et al 2012;L opez-Bellido et al 2012) have also been used to estimate nutritional status of plants. Tissue tests are, however, more popular since they are available to a large research community as well as farmers.…”

Section: Introductionmentioning

confidence: 99%

“…The SPAD-502 chlorophyll meter (Minolta Camera Co. Ltd., Japan), which measures the transmittance of light through the leaf, has been widely used. Several studies have shown a significant linear relationship between SPAD-readings and laboratory determination of leaf chlorophyll concentration (Hawkins, Gardiner, and Comer 2009;Ruiz-Espinosa et al 2010;Ibrahim and Jaafar 2013) and between SPAD-readings and leaf N concentration (Ibrahim and Jaafar 2013;Uchino et al 2013;Mahajan et al 2014;Basyouni, Dunn, and Goad 2015). The FieldScout CM 1000 meter, more recently manufactured, evaluates by remote sensing the chlorophyll content in the leaves based on the chlorophyll reflectance.…”

Section: Introductionmentioning

confidence: 99%

Assessing the potential use of two portable chlorophyll meters in diagnosing the nutritional status of plants

Afonso

Arrobas

Ferreira

et al. 2017

Journal of Plant Nutrition

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The SPAD-502 and the FieldScout CM 1000 chlorophyll meters were compared in their performance in diagnosing the nutritional status of plants.Leaves of a wide range of greenness were used to push the sensitivity of the tools to their limits. Both devices showed high reproducibility when used by different operators. The SPAD-readings were well-correlated with leaf nitrogen (N) concentrations, since leaves from heavily fertilized plants were not included in the sample population. The FieldScout-readings showed a marked saturation curve with the leaf N concentration, thus it cannot be used as a reliable N nutritional status index. The results also showed that the use of SPAD-502 in the diagnosis of the nutritional status of an orchard requires the establishment of specific critical concentrations for cultivars and sampling dates. The SPAD-502 appeared to have potential in the diagnosis of the nutritional status of the orchard for nutrients other than N.

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Use of nondestructive sensors to assess nitrogen status in potted poinsettia (Euphorbia pulcherrima L. (Willd. ex Klotzsch)) production

Cited by 24 publications

References 15 publications

Use of Nondestructive Sensors to Assess Nitrogen Status in Potted Dianthus (Dianthus chinensis L.) Production

Use of Nondestructive Sensors to Assess Nitrogen Status in Potted Dianthus (Dianthus chinensis L.) Production

Growth, Quality, and Economic Value Responses of Bedding Plants to Reduced Water Usage

Assessing the potential use of two portable chlorophyll meters in diagnosing the nutritional status of plants

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