Nitrogen use efficiency characteristics of commercial potato cultivars

Zebarth, Bernie J.; Tai, Guo; Tarn, Richard; Jong, H. De; Milburn, P.

doi:10.4141/p03-050

Cited by 100 publications

(115 citation statements)

References 23 publications

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“…Nos países da Europa e nos Estados Unidos, a dose de N recomendada varia de 70 a 330 kg ha -1 , com ciclo de cultivo em torno de cinco meses (Kolbe & Beckmann, 1997), e, no Canadá, de 165 a 215 kg ha -1 (Zebarth et al, 2004). No Brasil, é possível encontrar recomendações de fertilização variando de 60 a 250 kg ha -1 de N (Fontes, 1999).…”

Section: Resultsunclassified

Dose de nitrogênio associada à produtividade de batata e índices do estado de nitrogênio na folha

Coelho

Fontes

Puiatti

et al. 2010

Rev. Bras. Ciênc. Solo

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RESUMOO nitrogênio é um dos elementos de grande impacto na produtividade da batata, e seu efeito nas plantas pode ser avaliado por meio de técnicas de diagnóstico do estado nutricional. Este trabalho teve o objetivo de determinar a dose ótima econômica de N para a produção de tubérculos e estimar o nível crítico de índices do estado de N na folha de duas cultivares de batata. O experimento foi conduzido de maio a agosto de 2008, em delineamento em blocos ao acaso em esquema fatorial 4 x 2, sendo quatro doses de N (0, 100, 200 e 400 kg ha -1 de N, aplicadas em pré-plantio como ureia) e duas cultivares de batata (Ágata e Asterix), com quatro repetições. Aos 21 dias após a emergência foram determinadas a leitura SPAD e os teores de N e de clorofila na quarta folha a partir do ápice (QF). A produtividade de tubérculos comerciais aumentou até 45.065 e 46.500 kg ha -1 com o aumento da dose de N até 297 e 250 kg ha -1 para Ágata e Asterix, respectivamente. Para essas cultivares, a dose para obtenção da máxima eficiência econômica foi de 290 e 245 kg ha -1 de N, respectivamente. Nas duas cultivares, houve efeito positivo de doses de N sobre o índice SPAD e teores de N e de clorofila na QF. Os valores críticos foram de 40,5 e 43,7 para o índice SPAD, de 66,7 e 75,2 g kg -1 para o teor foliar de N e de 6,13 e 6,96 mg g -1 para o teor de clorofila total na matéria fresca das folhas, respectivamente, para Ágata e Asterix. Os valores da leitura do índice SPAD correlacionaram-se com os valores de clorofila total extraível na quarta (1) Recebido para publicação em maio de 2009 e aprovado em abril de 2010.

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Section: Resultsunclassified

Dose de nitrogênio associada à produtividade de batata e índices do estado de nitrogênio na folha

Coelho

Fontes

Puiatti

et al. 2010

Rev. Bras. Ciênc. Solo

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“…3 was generally low, at what might be considered to be background levels. For example Zebarth et al (2004a) found that under N limited conditions, commercial potato cultivars reduced soil NO 3 -N concentrations to about 4 mg N kg -1 soil. This is equivalent to a soil NO 3 -N content of 12 kg N ha -1 for the 0-to 30-cm depth, assuming a soil bulk density of 1.0 Mg m -3 , and is similar to the average soil NO 3 -N content of 14 kg N ha -1 measured at harvest in exp.…”

Section: Discussionmentioning

confidence: 99%

“…Plant dry matter and N accumulation were determined as described by . Harvest index (HI) was calculated as tuber dry matter divided by total plant dry matter, and N harvest index (NHI) as tuber N accumulation divided by total plant N accumulation; both were expressed as a percentage (Zebarth et al 2004a). The statistical analysis combined the data over years with years as a random effect, fertility treatments as main plots and cultivars as sub-plots.…”

Section: Methodsmentioning

confidence: 99%

“…One of the most practical approaches to reduce such environmental losses is to tailor fertilizer N applications to meet crop fertilizer N requirements. Soil N supply, the supply of plant available N to the crop over the growing season allowing for N losses (Ministry of Agriculture, Fisheries and Food 2000), can be large (Kleinkopf et al 1981), and also variable among fields and years (Zebarth et al 2004a). Soil N supply should, therefore, be taken into consideration when making fertilizer N recommendations.…”

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confidence: 99%

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Estimation of soil nitrogen supply in potato fields using a plant bioassay approach

Zebarth¹,

Leclerc²,

Moreau³

et al. 2005

Can. J. Soil. Sci.

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G. 2005. Estimation of soil nitrogen supply in potato fields using a plant bioassay approach. Can. J. Soil Sci. 85: [377][378][379][380][381][382][383][384][385][386]. Soil N supply is an important contributor of N to crop production; however, there is a lack of practical methods for routine estimation of soil N supply under field conditions. This study evaluated sampling just prior to topkill of whole potato plants that received no fertilizer N as a field bioassay of soil N supply. Three experiments were performed. In exp. 1, field trials were conducted to test if P and K fertilization, with no N fertilization, influenced plant biomass and N accumulation at topkill. In exp. 2, plant N accumulation at topkill in unfertilized plots was compared with mineral N accumulation in vegetation-free plots. In exp. 3, estimates of soil N supply were obtained from 56 sites from 1999 to 2003 using a survey approach where plant N accumulation at topkill, and soil mineral N content to 30-cm depth at planting and at tuber harvest were measured. Application of P and K fertilizer had no significant effect on plant N accumulation in two trials, and resulted in a small increase in plant N accumulation in a third trial. Zero fertilizer plots, which can be more readily established in commercial potato fields, can therefore be used instead of zero fertilizer N plots to estimate soil N supply. In exp. 2, estimates of soil N supply were generally comparable between plant N accumulation at topkill and maximum soil NO 3 -N accumulation in vegetation-free plots; therefore, the plant bioassay approach is a valid means of estimation of plant available soil N supply. Plant N accumulation at topkill in exp. 3 averaged 86 kg N ha -1 , and ranged from 26 to 162 kg N ha -1 . Plant N accumulation was higher for sites with a preceding forage crop compared with a preceding cereal or potato crop. Plant N accumulation was generally higher in years with warmer growing season temperatures. Soil NO 3 -N content at harvest in exp. 3 was less than 20 kg N ha -1 , indicating that residual soil mineral N content was low at the time of plant N accumulation measurement. Soil NO 3 -N content at planting was generally small relative to plant N accumulation, indicating that soil N supply in this region is controlled primarily by growing season soil N mineralization. Use of a plant bioassay approach provides a practical means to quantify climate, soil and management effects on plant available soil N supply in potato production. 377-386. La quantité de N présente dans le sol apporte beaucoup au N dont les cultures ont besoin pour croître. Cependant, on manque de méthodes pratiques pour estimer couramment les réserves de N dans les champs. La présente étude devait établir si l'échantillonnage de plants de pomme de terre entiers n'ayant pas reçu d'engrais azoté juste avant le défanage donnerait une idée de la concentration de N dans le sol. Les auteurs ont effectué trois expériences à cette fin. Dans la première, des essais sur le terrain ont permis de vérifier si l...

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“…The dry matter production of potato varies with climate, variety and management (Geremew et al, 2007), but has a linear increase with N supply up to certain levels (Zebarth et al, 2004), which improves its tuber quality (Roinila et al, 2003). Additionally, the total dry matter of potato accumulated by photosynthesis is utilized in different parts of the plant according to its development stage (Singh et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Dry matter accumulation and potato productivity with green manure

Mohamed

Watthier

Zanúncio

et al. 2017

Idesia

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Growth patterns and distribution of dry matter in different parts of potato plants (Solanum tuberosum, Solanaceae) with green manure can be positively influenced by the use of green manure. The aim was to evaluate the dry matter accumulation and productivity of potato with varying quantities of sunn hemp, Crotalaria juncea (Fabaceae) as a nitrogen source. The experiment used three different amounts of sunn hemp, equivalent to 100, 200 and 400 Kg ha -1 nitrogen (N), the recommended mineral N dose (250 Kg ha -1 ), and a treatment with zero N. Sampling was carried out at 35, 50, 65 and 80 days after planting, representing the subplots. The treatments were arranged in a randomized block design with split plot, the plot were enlarged fertilization and the small plot sampling dates. Four replications were used. Dry matter accumulation in the shoots of potato was greater with sunn hemp than with mineral nitrogen. The accumulation of dry matter in tubers and in the whole plant increased over time at higher rates of sunn hemp than with mineral fertilizer. Commercial and total potato productivity increased with sunn hemp quantity. Green manure at higher rates (400 and 200 Kg ha -1 ) increased the accumulation of dry matter in potato aboveground parts and in tubers. The commercial productivity of potato was 24% greater with green manure than with mineral fertilizers, indicating the potential of sunn hemp to provide adequate quantities of nitrogen for the growth and development of this crop.Key words: Crotalaria juncea, harvest index, nitrogen, Solanum tuberosum. RESUMEN Los patrones de crecimiento y la distribución de materia seca en las diferentes partes de la planta de papa Solanum tuberosum (Solanaceae) pueden ser influenciados positivamente por la utilización de abono verde. El objetivo del trabajo fue evaluar la acumulación de materia seca y el rendimiento de papa con diferentes dosis de

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Nitrogen use efficiency characteristics of commercial potato cultivars

Cited by 100 publications

References 23 publications

Dose de nitrogênio associada à produtividade de batata e índices do estado de nitrogênio na folha

Dose de nitrogênio associada à produtividade de batata e índices do estado de nitrogênio na folha

Estimation of soil nitrogen supply in potato fields using a plant bioassay approach

Dry matter accumulation and potato productivity with green manure

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