Response of summer‐planted potatoes to level of applied nitrogen and water

Hegney, M. A.; McPharlin, I. R.

doi:10.1080/01904160009382008

Cited by 10 publications

(7 citation statements)

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“…The rates of applied N required for maximum total and processing yield are similar to those reported for maximum yields of processing potatoes in Australia (Laurence et al, 1985;Maier et al, 1994aMaier et al, , 1994bDhalenberg et al, 1990;Sparrow and Chapman, 2003a) and the US (Porter and Sisson, 1991) and for fresh market potatoes on sands in WA (Hegney and McPharlin, 2000). The lower N requirements for maximum yield on sites 1 to 3 at Pemberton compared with the coastal sands at Medina reflects the finer texture of the loamy sands (5 to 8% clay) and the use of legumes (clover; Trifolium subterraneum) in rotation compared with the coastal sands (<2.0% clay).…”

Section: Discussionsupporting

confidence: 55%

YIELD AND QUALITY RESPONSE OF CRISPING POTATOES (SOLANUM TUBEROSUML.) TO APPLIED NITROGEN

McPharlin

Lancaster

2010

Journal of Plant Nutrition

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2The nitrogen (N) requirements of two Australian crisp potato (Solanum tuberosum L.) varieties, Bliss and Dawmor, were compared with Atlantic in experiments over three years on loamy sands and sands in the south west of Western Australia. There was a significant response of yield to rate of applied nitrogen (N) and variety on all sites and a significant nitrogen by varietal interaction on sands. Yield increased to a maximum with rate of applied N and then decreased above this rate on sites on loamy sands and or reached a plateau with no yield decrease (exponential response) at high rates of applied N on sands. Nitrate (NO 3 )-N concentration (mg kg −1 DW) in petioles required for maximum yield of Atlantic decreased linearly (P < 0.05) from 23,947 at the 10 mm tuber stage to 13,052 at the 60 mm tuber stage, in Dawmor from 22,429 to 14,644 and in Bliss from 20,202 to 12,597 over the same tuber stages. Bliss tubers had the highest specific gravity (SG) on both soil types and Dawmor the lowest on loamy sands. The effect of rate of applied N and variety on crisp cooking color, internal defects (hollow heart and internal brown spot) of tubers and tuber nutrient concentration is also discussed.

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Section: Discussionsupporting

confidence: 55%

YIELD AND QUALITY RESPONSE OF CRISPING POTATOES (SOLANUM TUBEROSUML.) TO APPLIED NITROGEN

McPharlin

Lancaster

2010

Journal of Plant Nutrition

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“…higher CT values and lower SBP values, whereas the irrigation effect was weaker. A similar relationship was observed by Hegney and McPharlin (2000) where the level of disintegration was assessed on a standard five-point scale. Our results were in qualitative agreement with data obtained by Searle et al (2005) and by Thybo et al (2002).…”

Section: Fertilisation and Irrigation Effectsmentioning

confidence: 66%

“…The likelihood of sloughing and mealiness could be predicted from their tuber density. Hegney and McPharlin (2000) found a decrease in potato disintegration with increasing levels of applied N or percent N in tubers; however, the irrigation level had little effect.…”

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confidence: 93%

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Role of cultivation conditions in potato sloughing as indicated by CPEM method

Hejlová¹,

Blahovec²

2007

PLANT SOIL ENVIRON

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The new CPEM (cooked potato effective mass) method was used to study the sloughing of a potato variety grown in two successive years in six regimes given by different levels and forms of fertilisation and irrigation. The sloughing process is characterized by the cooking time, i.e. the starting point of disintegration, and by the speed of disintegration. Both parameters are also evaluated in dependence on tuber density in linear models of cooking and disintegration stages. Effects of different cultivation regimes were observed in both stages. The sloughing sensitivity to tuber density expressed via the cooking time seemed to be a relatively stable variety parameter independent of growing conditions. The fertilisation reduced the level of sloughing, i.e. higher cooking time values (P < 0.0023), and at the same time lower disintegration rates (P < 0.006) were indicated for fertilised tubers. No influence of irrigation was observed in our study.

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“…Aumento na dose de N provocou decréscimo no nível de desintegração da batata assada (Hegney & McPharlin, 2000;Hejlová & Blahovec, 2007). Isso ocorre em razão da redução no teor de amido e na densidade do tubérculo (O'beirne & Cassidy, 1990).…”

Section: Resultsunclassified

Carboidratos e matéria seca de tubérculos de cultivares de batata influenciados por doses de nitrogênio

et al. 2010

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RESUMONeste trabalho, objetivou-se avaliar o efeito de doses de nitrogênio (N) sobre os teores de carboidratos (açúcares solúveis totais, açúcares redutores e amido), matéria seca e sólidos solúveis totais nos tubérculos de quatro cultivares de batata. Os tubérculos originaram-se de quatro experimentos, realizados simultaneamente no campo, no outono/inverno, na Universidade Federal de Viçosa. Em todos os experimentos, foi utilizado delineamento em blocos casualizados, com quatro repetições. Os tratamentos foram compostos de cinco doses de N (0, 50, 100, 200 e 300 kg ha -1 ) na forma de sulfato de amônio, aplicadas no plantio das cultivares Ágata, Asterix, Atlantic e Monalisa. Foram analisados os teores de matéria seca, açúcares solúveis totais, açúcares redutores, amido e sólidos solúveis totais nos tubérculos, após 30 dias de armazenamento a 5ºC a 80-85% de umidade relativa. Em todas as cultivares, as doses de N apresentaram efeito quadrático sobre o teor de sólidos solúveis totais e não houve efeito sobre os teores de matéria seca e de amido nos tubérculos de batata. Dependendo da cultivar, as doses de N influenciam positivamente, ou não influenciam os teores de açúcares redutores e açúcares solúveis totais nos tubérculos de batata. Termos para indexação:Solanum tuberosum L., adubação nitrogenada, qualidade de tubérculos, açúcares, amido, matéria seca. ABSTRACTThis study aimed to evaluate the effect of nitrogen (N) doses on carbohydrate (total soluble sugars, reducing sugars and starch), dry matter and total soluble solids contents in tuber of four potato cultivars. The tubers originated from four experiments, simultaneously conducted in the field, during fall/winter, at the Federal University of Viçosa. These experiments were set in randomized complete block and four repetitions and we evaluated the effects of five N rates (0, 50, 100, 200, and 300 kg ha -1 ) on Agata, Asterix, Atlantic and Monalisa cultivars. Dry matter, total soluble sugars, reducing sugars, starch, and total soluble solids contents of the tubers were analyzed after a 30-day storage at 5ºC. N rates presented quadratic effects on the total soluble solids and presented no effects on dry matter and starch contents for all cultivars. Depending on the cultivar, N rates had positive effects or did not affect reducing sugars and total soluble sugars contents in the tubers.Index terms: Solanum tuberosum L., fertilization, tuber quality, sugars, starch, dry matter. INTRODUÇÃOA batata (Solanum tuberosum L.) tem importância econômica entre as olerícolas e no mundo é o quarto cultivo alimentar mais importante depois do trigo, arroz e milho (Fontes & Pereira, 2005). Em 2008, a produção brasileira de batata foi de 3.636.419 toneladas, com área plantada de 144.400 hectares, atingindo produtividade de 25,18 t ha -1 . A produtividade mundial em 2007 foi de 16,65 t ha -1 (Agrianual, 2009). O mercado brasileiro é abastecido por cultivares originárias da Holanda, Alemanha e Canadá, como Ágata' Asterix, Atlantic, Monalisa, entre dezenas de outras.A batata é re...

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Response of summer‐planted potatoes to level of applied nitrogen and water

Cited by 10 publications

References 20 publications

YIELD AND QUALITY RESPONSE OF CRISPING POTATOES (SOLANUM TUBEROSUML.) TO APPLIED NITROGEN

YIELD AND QUALITY RESPONSE OF CRISPING POTATOES (SOLANUM TUBEROSUML.) TO APPLIED NITROGEN

Role of cultivation conditions in potato sloughing as indicated by CPEM method

Carboidratos e matéria seca de tubérculos de cultivares de batata influenciados por doses de nitrogênio

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