Steering nitrogen fertilisation by means of portable chlorophyll meter reduces nitrogen input and improves quality of fertigated cantaloupe (<i>Cucumis melo</i> L. var. <i>cantalupensis</i> Naud.)

Gianquinto, Giorgio; Fecondini, Marco; Mezzetti, M.; Orsini, Francesco

doi:10.1002/jsfa.3843

Cited by 11 publications

(7 citation statements)

References 35 publications

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“…Collected data are then transformed (either directly by the tool or by the operator) into vegetation indices (VIs). In the last decade, research has repeatedly addressed the application of optical tools for proper nitrogen management, for instance, in tomato (Gianquinto et al, 2011;Granados et al, 2013), melon (Gianquinto et al, 2009;Gallardo et al, 2011;Padilla et al, 2014), and cucumber (Padilla et al, 2017).…”

Section: Soil Fertility and Plant Nutritionmentioning

confidence: 99%

Current trends in protected cultivation in Mediterranean climates

Hernández

Orsini

Baeza³

et al. 2018

Europ.J.Hortic.Sci.

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Protected cultivation has rapidly expanded in many regions all over the world, particularly in those with mild winter climatic conditions. In this context, the greenhouse industry is continually developing new strategies and technologies to solve specific cultivation limitations, to reduce any related environmental impact and to adjust to new market requirements. It is for this reason that it is necessary to update the scientific knowledge of this industry. The characteristics of greenhouse production related to new developments in structures and climate control, crops, cultivation techniques, water and nutrient management and environmental issues, including life cycle assessment and integrated pest management, are the objective of this study. Overall, the main results of this review demonstrate that a great effort of innovation and research has been carried out by industry and researchers in order to cut production costs and to reduce the environmental impact of the most advanced greenhouse technologies while satisfying the requirements of consumers.

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Section: Soil Fertility and Plant Nutritionmentioning

confidence: 99%

Current trends in protected cultivation in Mediterranean climates

Hernández

Orsini

Baeza³

et al. 2018

Europ.J.Hortic.Sci.

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“…Of course, the concept of effectiveness from a plant metabolic point of view does not correlate with the concept of economic effectiveness for the producer. In fact, small changes in N availability around the optimal point of crop-required N result in dramatic yield changes (Gianquinto et al, 2010). Other experiments carried out on corn (Zea mays) in Quebec highlighted that optimum N would significantly vary not only among seasons and within seasons (function of the region, the soils, and the crop management) but also among fields and even within fields (Tremblay et al, 2008).…”

Section: Limits Of the N Balance Sheet To Guide Fertilizationmentioning

confidence: 99%

“…The latter work in potato pointed out that the correlation with either chlorophyll or nitrogen content improved when expressed on a leaf area rather than with either fresh or dry weight basis. The application of both SPAD and N-tester was successfully adopted on several crops, such as potato (Gianquinto et al, 2003a(Gianquinto et al, , 2003b(Gianquinto et al, , 2004, tomato [Solanum lycopersicum (Gianquinto et al, 2006)], cantaloupe (Gianquinto et al, 2010;Orsini et al, 2009), and friarielli [Brassica rapa ssp. sylvestris (De Pascale et al, 2008)].…”

Section: Assessing the Leaf Nutritional Status Through Hand-held Optimentioning

confidence: 99%

“…Although several studies addressed the determination of this threshold as an absolute measure, the pedo-climatic conditions in which the crop grows greatly affect the readings of the optical instruments used. The alternative provided by the adoption of ''windows'' or ''spy plots'' as reference appears the most promising strategy (Gianquinto et al, 2003a(Gianquinto et al, , 2010Samborski et al, 2009): this procedure consists in applying a non-limiting N rate on a reference plot or strip (window) and comparing instruments' readings from the window to that from the field as such. Quite a few studies on the adoption of ''spy plots'' are reported in the literature, and the model applied to the data yielded in several experiments across Europe (Gianquinto et al, 2004) proved to be suitable in most cases.…”

Section: Dynamic Fertilization Management Using Optical Toolsmentioning

confidence: 99%

“…A bad point distribution around the regression line could be improved by plotting relative yield against modified, rather than original optical tool readings, such as the previously presented vegetation indices. Under these conditions, the adoption of dynamic fertilization allowed the dramatic reduction of N application (down to 30% to 60% in potato and 17% to 66% in cantaloupe) (Gianquinto et al, 2004(Gianquinto et al, , 2010.…”

Section: Dynamic Fertilization Management Using Optical Toolsmentioning

confidence: 99%

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The Use of Diagnostic Optical Tools to Assess Nitrogen Status and to Guide Fertilization of Vegetables

Gianquinto

Orsini

Sambo

et al. 2011

hortte

Self Cite

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Dynamic fertilization management is a way of bringing nutrients to the plant when they are crucial for its development. However, destructive measurements of crop nitrogen (N) status are still too costly and time consuming to justify their use, and the implementation of methodologies based on non-destructive, quick, and easy to use tools for plant nutritional status monitoring appears as an appealing opportunity. Several optical tools for plant monitoring have been developed in recent years, and many studies have assessed their ability to discriminate plant N status. Such tools can measure at leaf level (hand-held optical instruments) or may consider the canopy of a plant or few plants (portable radiometers) or even measure areas, such as a field, a farm, or a region (aerial photography). The application of vegetation indices, which combine the readings at different wavelengths, may improve the reliability of the collected data, giving a more precise determination of the plant nutritional status. In this article, we report on the state of the art of the available optical tools for plant N status monitoring.

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Application of Proximal Optical Sensors to Assess Nitrogen Status and Yield of Bell Pepper Grown in Slab

Silva

Fontes

Milagres

et al. 2020

J Soil Sci Plant Nutr

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Nitrogen (N) is an essential element frequently associated with environmental issues, and the utilization of leaf clip sensors to adjust N fertilization is a technology of interest. This study aimed to evaluate the indices measured with SPAD and Dualex through the bell pepper crop cycle cultivated under different N doses, to identify the ability of the SPAD and Dualex optical sensors to assess N status and establishing the accuracy of the chlorophyll indices as yield estimators. Bell pepper plants were cultivated for 150 days after transplanting (DAT) in slabs fertigated with 6 different N doses divided into 10 biweekly applications. The indices SPAD, chlorophyll (CHL), flavonoids (FLV), and nitrogen balance index (NBI) were measured over the cycle on the uppermost mature leaves of each treatment. We determined the N content of these leaves and the final commercial yield. An interaction effect was found between N dose and growth stage. The SPAD and CHL indices were not significantly affected by N dose up to 60 DAT. The FLV and NBI indices show an opposite pattern in response to N dose. We found a strong correlation between the SPAD, CHL, and NBI and the N content in the leaves and between these indices and commercial yield in several evaluated dates. However, we did not observe a significant correlation between commercial yield and FLV. Both leaf clip sensors could predict the N status of the leaves and the commercial yield, improving the correlation as the crop development progressed.

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Steering nitrogen fertilisation by means of portable chlorophyll meter reduces nitrogen input and improves quality of fertigated cantaloupe (Cucumis melo L. var. cantalupensis Naud.)

Cited by 11 publications

References 35 publications

Current trends in protected cultivation in Mediterranean climates

Current trends in protected cultivation in Mediterranean climates

The Use of Diagnostic Optical Tools to Assess Nitrogen Status and to Guide Fertilization of Vegetables

Application of Proximal Optical Sensors to Assess Nitrogen Status and Yield of Bell Pepper Grown in Slab

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