Nitrate-Nitrogen Rates in Petiole Sap of Potato Crop (Solanum Tuberosum L.)

Majić, Adrijana; Poljak, Milan; Sabljo, Ana; Sefo, Elma; Knezović, Zrinka

doi:10.17660/actahortic.2009.846.38

Cited by 2 publications

(4 citation statements)

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“…Therefore, tissue analysis should be used with awareness of its drawbacks and in combination with soil analysis (Silveira et al 2007). Most tissue nutrient assessments have shown significant correlations with crop yields such as with potatoes (Westcott, Stewart, and Lund 1991;Majić et al 2009), cotton (Sunderman, Onken, and Hossner 1979), soft winter wheat (Ortuzar-Iragorri et al 2005), and corn (Rostami et al 2008;Ziadi et al 2008).…”

Section: Plant Nutrient Assessmentmentioning

confidence: 99%

“…Although the Cardy meter may be considered easy to operate and maintain and is an important tool to routinely assess the crop N status during varied stages of plant growth (Westerveld, McDonald, and McKeown 2007), some important factors should be considered with Downloaded by [Oregon State University] at 02:47 27 December 2014 respect to sap analysis. For instance, the plant water status may significantly influence the nitrate status in the same way as the presence or absence of clouds, time of sampling, and tissue portion to be sampled (Hartz et al 1993;Hochmuth 1994;Majić et al 2009). The nitrate ion-selective electrode is sensitive to temperature fluctuations and the device may require at least two calibrations during a single reading time (Hartz et al 1993).…”

Section: Rapid Field Testsmentioning

confidence: 99%

“…when comparing on-site Cardy meter nitrate-N readings with soil nitrate N (Sims et al 1995), with petiole nitrate N (Vitosh and Silva 1994;Zhang et al 1996;Errebhi, Rosen, and Birong 1998) and with leaf petiole total N (Majić et al 2009) traditionally measured by laboratory procedures. 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.…”

Section: Kellhuiri Vinto Coopani San Juan Circamentioning

confidence: 99%

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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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Section: Plant Nutrient Assessmentmentioning

confidence: 99%

Section: Rapid Field Testsmentioning

confidence: 99%

Section: Kellhuiri Vinto Coopani San Juan Circamentioning

confidence: 99%

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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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“…Na recomendação da adubação nitrogenada para as condições brasileiras, alguns estados da região Sul e dos Cerrados têm utilizado o teor de matéria orgânica do solo como indicador da disponibilidade de N. No entanto, uma melhoria potencial seria a inclusão de características da planta que permitissem o monitoramento da disponibilidade de N durante o ciclo da cultura, visando maior precisão e flexibilidade no manejo do N. Para a batata, são citadas as análises em tempo real na planta envolvendo a utilização da tabela de cor (SILVA; FONTES, 2006), teor de nitrato no suco celular (MAJIC et al, 2009) e clorofilômetro SPAD-502 (COELHO et al, 2010;SILVA et al, 2011).…”

Section: Introductionunclassified

Valor e predição do nível crítico de índices para avaliar o estado nitrogenado da batateira

Coelho¹,

Fontes²,

Cecon³

et al. 2013

Rev. Ciênc. Agron.

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RESUMO -Independentemente do índice de nitrogênio (N) utilizado, a existência de valores aceitos como concentração crítica é necessária para uso como padrão de referência. Objetivou-se estabelecer níveis críticos do índice SPAD, ângulo Hue, concentração de N-total e massa da matéria seca da quarta-folha da batateira por dois métodos e utilizar tais níveis críticos para a predição do estado de N da planta com base na produtividade relativa. Os experimentos foram conduzidos nas safras "de inverno" e "das águas". Os tratamentos foram constituídos por 5 doses de N aplicadas em pré-plantio (0; 50; 100; 200 e 300 kg ha -1 de N), na forma de uréia. O delineamento foi em blocos ao acaso com 4 repetições. A cultivar de batata utilizada foi a Ágata. Aos 21 dias após a emergência (DAE) foram determinados o índice SPAD, concentração de N-total, ângulo Hue e massa da matéria seca da quarta-folha a partir do ápice da batateira (MSQF). Para o cálculo do valor do nível crítico foram utilizados o procedimento gráfico de Cate-Nelson e matemático. Os erros da predição do diagnóstico do estado de N, a partir dos níveis críticos, foram estimados a partir do método gráfico de Cate-Nelson, quantificando-se a porcentagem de observações localizadas nos quadrantes negativos. Houve aparente discrepância no valor do nível crítico dos índices de N utilizando-se os dois procedimentos de cálculo. Os níveis críticos determinados aos 21 DAE são adequados para fazer avaliações relativamente precisas de suficiência de N em um estádio precoce de avaliação.Palavras-chave: Diagnóstico. Nitrogênio. Prognóstico. Batata.ABSTRACT -Regardless of the nitrogen (N) content used, the existence of values, accepted as a critical concentration, is necessary for use as a reference standard. The objective was to establish critical levels of the SPAD index, Hue angle, concentration of total N, and fourth-leaf dry matter of the potato plant, by two methods, and to use such critical levels for the prediction of the N-status of the plant, based on the relative yield. The experiments were conducted on crops from the winter and rainy seasons. The treatments consisted of five dosages of N, applied in the form of urea when planting (0, 50, 100, 200 and 300 kg ha -1 of N). The design was of randomized blocks with four replications. The potato cultivar used was Agata. At 21 days after emergence (DAE) the SPAD index, concentration of total N, Hue angle and dry weight of the fourth leaf from the apex of the plant (MSQF), were all determined. To calculate the critical level, the Cate-Nelson graphical procedure and a mathematical procedure were used. The prediction errors of the diagnosis of the N-status determined from the critical levels were estimated using the Cate-Nelson graphical method, by quantifying the percentage of observations which were located in negative quadrants. There was an apparent discrepancy in the critical-level values of N when using the two calculation procedures. The critical levels determined at 21 DAE are suitable for making relatively accurate asse...

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Nitrate-Nitrogen Rates in Petiole Sap of Potato Crop (Solanum Tuberosum L.)

Cited by 2 publications

References 0 publications

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

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

Valor e predição do nível crítico de índices para avaliar o estado nitrogenado da batateira

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