Petiole sap nitrate is better than total nitrogen in dried leaf for indicating nitrogen status and yield responsiveness of capsicum in subtropical Australia

Olsen, J. K.; Lyons, Daniel

doi:10.1071/ea9940835

Cited by 34 publications

(32 citation statements)

References 16 publications

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“…Despite this interaction, the NO3sap5 parameter was affected mainly by fertilization and therefore is a good indicator of relative nitrogen supply. A study of peppers demonstrated that the sap nitrate content of the petiole is a better indicator of plant nitrogen status than the total nitrogen concentration in the blades and petioles of the dried leaves (Olsen and Lyons 1994). In this study, the NO3sap5 measured in broccoli had a wide range (averaging between 1200 and 3500 ppm) in response to fertilizer treatments.…”

Section: Nitrate Content Of the Sapmentioning

confidence: 79%

Influence of nitrogen fertilization on yield, hollow stem incidence and sap nitrate concentration in broccoli

Belec¹,

Villeneuve²,

Coulombe³

et al. 2001

Can. J. Plant Sci.

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Impact of nitrogen fertilization on yield, hollow stem incidence and sap nitrate concentration in broccoli. Can. J. Plant Sci. 81: 765-772. This study, spanning 2 yr at two different sites, compared the effects of nitrogen fertilization on broccoli yield and quality in relation to the influence of site and production season. This research also evaluated the potential use of measuring nitrate in petiole extracts to determine broccoli nitrogen requirements when making a second fertilizer application 5 wk after transplant. Treatments consisted of factorial combinations of three nitrogen fertilization rates at transplant (N min , 50-N min and 100-N min kg N ha -1 , where N min was the soil nitrate concentration) and four nitrogen fertilization rates 5 wk after transplant (0, 50, 100 and 150 kg N ha -1 ). The marketable yield of broccoli increased with the rate of nitrogen application. Hollow stem incidence showed the same trend as yield, and was greatest when high levels of nitrogen were applied 5 wk after transplant. Interactions between the 5-wk nitrogen application and production year, as well as growing site were significant. The nitrate content of the sap was measured immediately before the 5-wk nitrogen application and 2 wk later. The nitrate concentration measured at 5 wk increased with transplant nitrogen, as did the concentration measured at 7 wk. Nitrate concentration at 7 wk increased curvilinearly with the 5-wk fertilizer application rates. Sap analysis provided clear evidence of the effect of nitrogen application rates, but Environment precluded determination of an absolute threshold of nitrate sufficiency in the sap.Key words: Brassica oleracea L. var. Italica, split application, quality, environment Bélec, C., Villeneuve, S., Coulombe, J. et Tremblay, N. 2001. Impacts de la fertilisation azotée sur le rendement, la présence de tige creuse et la concentration en nitrate de la sève chez le brocoli. Can. J. Plant Sci. 81: 765-772. Deux années d'étude sur deux sites différents ont permis de comparer les effets de l'application de fertilisants azotés sur le rendement et la qualité du brocoli par rapport à l'influence du site et de l'année de production. Cette recherche visait également à vérifier les capacités et les limites de la mesure du nitrate des extraits de pétioles dans la détermination des besoins en azote du brocoli au moment de réaliser une application complémentaire de fertilisant, 5 semaines après la plantation. Trois doses d'azote ont été appliquées à la plantation (N min , 50-N min and 100-N min kg N ha -1 , N min étant la concentration de nitrate dans le sol) et quatre doses cinq semaines après la plantation (0, 50, 100 et 150 kg N ha -1 ). Le rendement vendable du brocoli a augmenté avec les doses d'azote. L'incidence de la tige creuse a évolué dans le même sens que le rendement avec une augmentation importante reliée à l'application d'azote cinq semaines après la plantation. Des interactions significatives ont été mesurées entre les traitements et l'année de production ou le site de cultu...

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Section: Nitrate Content Of the Sapmentioning

confidence: 79%

Influence of nitrogen fertilization on yield, hollow stem incidence and sap nitrate concentration in broccoli

Belec¹,

Villeneuve²,

Coulombe³

et al. 2001

Can. J. Plant Sci.

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“…Analysis of NO 3 -concentration in soil solution obtained with ceramic cup suction samplers from the root zone (Hartz et al, 1993;Burt et al, 1995) and in petiole sap Hochmuth, 1994Hochmuth, , 2007Olsen and Lyons, 1994) have been suggested as methods for on-going monitoring of, respectively, the immediately available soil N and crop N status. Recent studies within greenhouse vegetable production systems (Granados et al, , 2007Gallardo et al, 2006) have demonstrated that soil solution nitrate concentration is very sensitive to crop N management.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of rapid analysis systems for on-farm nitrate analysis in vegetable cropping

Thompson

Gallardo

Joya

et al. 2009

Span. j. agric. res.

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Small analytical systems enabling rapid on-farm analysis may be useful for monitoring crop and soil nutrient status. Two commercially available, rapid analysis systems were evaluated for analysis of in aqueous standard solutions (AS), and in soil solution (SS), plant sap (PS) and fertigation nutrient solutions (NS) obtained from tomato crops. The systems were the Merck RQFlex reflectometer and the Hanna Instruments C115 Grow Master colorimeter. in AS covered the analytical range of each instrument, being 0.3-3.2 and 0.3-16.1 mmol L -1 , respectively, for the reflectometer and colorimeter. were 5-14 mmol L -1 for SS, 2.3-33 mmol L -1 for NS, and 63-158 mmol L -1 for PS. Accuracy was evaluated using linear regression against (i) known concentration for AS, and (ii) laboratory analysis for SS, PS and NS. For the reflectometer with AS, SS and PS, the linear regression had slopes of 1±0.08 and intercepts of <0.6 mmol L -1 . In NS up to 9 mmol L -1 , there was a similar slope, with an intercept of 1.3 mmol L -1 . In the three most concentrated NS samples, there was a larger relative error that was attributed to faulty dilution. Coefficients of determination were always r 2 ≥0.94. The reflectometer was generally accurate for all media examined; it was rapid (1 min per analysis) and simple to use. The colorimeter was generally similarly accurate; however, it was slower, required reagent preparation and was subject to colour interferences. This work demonstrated that the reflectometer can provide rapid and accurate on-farm measurement of in SS, PS and NS. Additional key words: nutrient management, nutrient solution, plant sap, quick-test, soil solution, tomato. Resumen Evaluación de sistemas rápidos para análisis en campo de nitrato en cultivos hortícolasLos sistemas rápidos que permiten análisis en campo pueden ser útiles para monitorizar el estado nutricional del cultivo y del suelo. Se evaluaron dos sistemas analíticos rápidos para analizar [NO 3 -] en soluciones acuosas (AS), solución del suelo (SS), muestras de savia (PS) y soluciones de fertirriego (NS). Se evaluó el reflectómetro RQFlex de Merck y el colorímetro C115 de Hanna. La [NO 3 -] en AS cubrió el rango analítico de cada instrumento y fue 0.3-3.2 y 0.3-16.1 mmol L -1 , respectivamente, para el reflectómetro y el colorímetro. La [NO 3 -] alcanzó 5-14 mmol L -1 para muestras de SS, 2.3-33 mmol L -1 para NS, y 63-158 mmol L -1 para PS. Para valorar la exactitud de los equipos se usaron regresiones lineales. Para el reflectómetro con muestras de AS, SS y PS, la regresión lineal tuvo pendientes de 1±0.08 e interceptos de <0.6 mmol L -1 . En NS para valores de hasta 9 mmol L -1 , la pendiente fue similar entre equipos, con un intercepto de 1.3 mmol L -1 . En las NS más concentradas, hubo un error relativamente grande que se atribuye a fallos en la dilución. Los r 2 fueron siempre ≥0.94. El reflectómetro fue generalmente preciso en los medios evaluados; fue rápido (1 min/análisis) y simple de usar. El colorímetro tuvo generalmente una exactitud s...

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“…This result indicates that determining leaf petiole nitrate-N content through the Cardy meter might be a rapid and reliable means to determine potato plant N status in this semi-arid region where either no soil and plant analysis laboratories exist or they are difficult to access. Some research has found that the petiole sap nitrate-N measurement is more sensitive to N fertilizers and a better indicator of plant N status and crop yield than petiole total N measured in dried leaf petioles (Olsen and Lyons 1994).…”

Section: Kellhuiri Vinto Coopani San Juan Circamentioning

confidence: 99%

Evaluation of a Rapid Field Test Method for Assessing Nitrogen Status in Potato Plant Tissue in Rural Communities in the Bolivian Andean Highlands

Aguilera¹,

Motavalli

Gonzales³

et al. 2014

Communications in Soil Science and Plant Analysis

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The relatively poor accessibility, high costs, long turnaround time for analysis, and lack of information about soil and plant testing in the Andean highland region (Altiplano) of Bolivia has hampered informed and timely nutrient management decisions for potato (Solanum tuberosum L.) crops. The objective of this study was to determine if the Cardy nitrate meter (Horiba Ltd., Kyoto, Japan), a low-cost, portable, and rapid field test method, could be used to improve nitrogen (N) fertility management among isolated rural indigenous communities at different elevations in this rugged semi-arid environment. Fully matured leaf petioles were sampled at blooming time from potato trials established in three communities during the 2006-2007 and 2007-2008 growing seasons. Those trials were composed of 12 fertility treatments (i.e., an unfertilized control and different combinations of sheep and cow manure, inorganic fertilizer, commercial household/urban compost, and a commercial microbial activator soil amendment) arranged in a randomized complete block design with four replications. In general, in both growing seasons and in all communities, nitrate measured in the sap of leaf petioles by the Cardy meter had relatively low but significant correlations with leaf petiole total N (ranging from r 2 = 0.07 to r 2 = 0.60 across seasons and communities) and with total fresh tuber yield (ranging from r 2 = 0.11 to r 2 = 0.50 across seasons and communities). However, some problems were encountered with being able to consistently calibrate the meter with supplied standards prior to each use of the meter. These results indicate that the Cardy ion meter might be an effective tool for potato growers or agricultural professionals working in the Altiplano of Bolivia if further research can be conducted to determine if the meter is consistent for diverse sites in the Altiplano and is practical for the cultural, economic, and environmental conditions of the region.

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Petiole sap nitrate is better than total nitrogen in dried leaf for indicating nitrogen status and yield responsiveness of capsicum in subtropical Australia

Cited by 34 publications

References 16 publications

Influence of nitrogen fertilization on yield, hollow stem incidence and sap nitrate concentration in broccoli

Influence of nitrogen fertilization on yield, hollow stem incidence and sap nitrate concentration in broccoli

Evaluation of rapid analysis systems for on-farm nitrate analysis in vegetable cropping

Evaluation of a Rapid Field Test Method for Assessing Nitrogen Status in Potato Plant Tissue in Rural Communities in the Bolivian Andean Highlands

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