Influence of irrigation and nitrogen management on potato yield and quality

Ojala, J. C.; Stark, J. C.; Kleinkopf, G. E.

doi:10.1007/bf02986910

Cited by 179 publications

(123 citation statements)

References 30 publications

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“…Thus, an acceptable strategy for N management seems to be the application at preplant of a part of N expected to be needed with the necessary adjustments as sidedress (Ojala et al, 1990;Porter and Sisson, 1991). Plant analysis or tissue testing allow assessing the crop nutritional status and, consequently, can be used to make in-season N fertilization adjustments in order to better balance N rates with crop needs.…”

Section: Introductionmentioning

confidence: 99%

Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices

Rodrigues¹,

Coutinho

Martins

et al. 2005

European Journal of Agronomy

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The quantification of sidedress N rate from in-season information on crop N nutritional status is extremely important in order to use only the necessary amount of nutrient to achieve maximum yields without significant N losses from soil. During three consecutive years (1996, 1997 and 1998) field N fertilizer experiments with irrigated potato (Solanum tuberosum L., cv. Désirée) were conducted in Bragança (NE Portugal). Eight preplant treatments (0, 50, 100, 200 and 300 kg urea-N/ha and poultry manure, farmyard manure and municipal solid waste in rates equivalent to 100 kg organic-N/ha) were arranged as main plots and five sidedress N rates (0, 25, 50, 100 and 200 kg urea-N/ha) included as subplots. Petiole nitrate concentration, determined by a laboratory method (PNLab, g NO 3 -N kg −1 , dry weight basis) and by the portable RQflex reflectometer (PNRQflex, mg NO 3 kg −1 , from fresh tissues), and leaf N content (LeafN, g kg −1 , dry weight basis) were used as N nutritional indices. From the five sidedress N rates applied over each of the preplant treatments, critical sidedress N rates were estimated for several different crop N nutritional status. This was achieved by establishing exponential asymptotic curves between sidedress N rates and tuber yields and solving the equations for 95% of maximum tuber yield. In a second step, multiple regression equations were established between the estimated critical sidedress N rates (SNrate, kg N/ha), as dependent variable, and each crop N nutritional indices (PNLab, PNRQflex or LeafN) and days after emergence (DAE). The equations obtained are: SNrate = 182.7 − 4.146 × PNLab −1.87 × DAE SNrate = 161.0 − 0.013 × PNRQflex −1.34 × DAE SNrate = 562.2 − 8.416 × LeafN −3.59 × DAE These equations provide quantitative sidedress N rates for any level of crop N nutritional indices and sampling dates from 10 to 48 days after emergence.

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Section: Introductionmentioning

confidence: 99%

Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices

Rodrigues¹,

Coutinho

Martins

et al. 2005

European Journal of Agronomy

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“…Nous suggérons d'utiliser une teneur critique en milieu de saison de 80 mg NO 3 -N kg -1 sol au dessus de laquelle une application additionnelle d'azote n'est pas requise. Fertilisation azotée, nitrate, Nop, rendement relatif, Solanum tuberosum, valeur critique Although N greatly affects potato production (Ojala et al 1990; Vos 1997), the improper use of N fertilizer can result in water contamination by leaching and air pollution via denitrification. …”

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Predicting nitrogen fertilizer requirements of potatoes in Atlantic Canada with soil nitrate determinations

Bélanger

Walsh²,

Richards³

et al. 2001

Can. J. Soil. Sci.

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N. 2001. Predicting nitrogen fertilizer requirements of potatoes in Atlantic Canada with soil nitrate determinations. Can. J. Soil Sci. 81: 535-544. Nitrogen greatly affects potato (Solanum tuberosum L.) yield, but excess N can result in environmental degradation. In this study soil nitrate (NO 3 -N) content was determined pre-plant to predict fertilizer N requirements of potatoes in Atlantic Canada and in mid-season to adjust N fertilization during the growing season. Soil NO 3 -N contents were measured to a 0.30-m depth in spring prior to planting at four on-farm sites in each of 3 yr (1995 to 1997) in the upper St. John River Valley of New Brunswick, Canada. Mid-season soil NO 3 -N contents at a 0-0.30 m depth were also determined (32-47 days after planting) at two sites in three N treatments in 1995 (0, 50, and 250 kg N ha -1 ) and in four N treatments in 1996 and 1997 (0, 50, 100, and 250 kg N ha -1 ). The yield response of potatoes to six rates of N fertilization (0-250 kg N ha -1 ) with and without supplemental irrigation was used to determine the economically optimum N application (Nop). The pre-plant spring soil NO 3 -N test alone could not adequately predict the N requirements of potatoes in Atlantic Canada; the Nop and relative yield were poorly correlated (0.07 < R 2 < 0.52) with spring soil NO 3 -N content. The midseason soil NO 3 -N test, however, could be used to determine the need for supplemental N fertilizer; NO 3 -N content correlated well (0.44 < R 2 < 0.68) with the relative yield for total and marketable yield. We suggest a critical mid-season value of 80 mg NO 3 -N kg -1 soil for marketable yield, above which additional N application might not be necessary.Key words: N fertilizer, nitrate, Nop, relative yield, Solanum tuberosum, critical value Bélanger, G., Walsh, J. R., Richards, J. E., Milburn, P. H. et Ziadi, N. 2001. La prédiction des besoins en fertilisation azotée de la pomme de terre au Canada Atlantique avec les teneurs en nitrate des sols. Can. J. Soil Sci. 81: 535-544. L'azote (N) affecte beaucoup le rendement de la pomme de terre (Solanum tuberosum L.) mais l'excès de son utilisation peut causer une dégradation environnementale. Dans cette étude, la teneur du sol en nitrate (NO 3 -N) a été déterminée avant la plantation afin de prédire les besoins en N de la pomme de terre produite au Canada Atlantique et en milieu de saison afin d'ajuster la fertilisation au cours de la saison de croissance. La teneur du sol en nitrate a été mesurée au printemps à une profondeur de 0,30 m à quatre sites pendant trois années (1995 à 1997) dans la vallée de la rivière St-Jean au Nouveau-Brunswick, Canada. La teneur du sol en NO 3 -N à une profondeur de 0,30 m a aussi été déterminée 32-47 jours après la plantation (test de milieu de saison) à deux sites dans trois traitements en 1995 (0, 50, et 250 kg N ha -1 ) et dans quatre traitements en 1996 et 1997 (0, 50, 100, et 250 kg N ha -1 ). La réponse à la fertilisation azotée (0-250 kg N ha -1 ) avec ou sans irrigation supplémentaire a été utilisé...

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“…O estádio IV ou período de maturação é marcado pelo início do amarelecimento dos caules e a senescência das folhas, indo até o final do ciclo (Roberts & Dole, 1985;Ojala, et al, 1990;Biemond & Vos, 1992). Na ausência de uma curva de absorção de nutrientes, a produção de MS fornece uma boa aproximação do acúmulo de nutrientes (Sousa & Coelho, 2001) e os fatores associados à produção de MS na cultura da batateira são: as práticas culturais, a maturidade dos tubérculos, a disponibilidade hídrica, a eficiência fotossintética e a adubação (Pereira, 1987;Beukema & Zaag, 1990;Chapman et al, 1992;Ewing, 1997;Panique et al, 1997;Fageria et al, 1997).…”

Section: Massa De Materials Seco E Acúmulo De Nutrientes Pela Batateiraunclassified

“…Segundo Ojala et al (1990), a batateira requer uma quantidade baixa de nitrogênio durante o crescimento vegetativo. Aproximadamente 15% do nitrogênio total, para a cv.…”

Section: Taxa De Acúmulo De Massa De Materials Secounclassified

Curva de crescimento e acúmulo de nutrientes pela cultura da batata cv. 'Atlantic'

Yorinori¹

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Influence of irrigation and nitrogen management on potato yield and quality

Cited by 179 publications

References 30 publications

Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices

Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices

Predicting nitrogen fertilizer requirements of potatoes in Atlantic Canada with soil nitrate determinations

Curva de crescimento e acúmulo de nutrientes pela cultura da batata cv. 'Atlantic'

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