Nitrate Accumulation In Crops And Nitrate Poisoning In Animals

Wright, Melissa W.; Davison, K. L.

doi:10.1016/s0065-2113(08)60025-5

Cited by 292 publications

(194 citation statements)

References 88 publications

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“…1978) provided~n opportunity to investigate whether the herbage protein to nonstructural carbohydrate im· balance was accentuated by the application of fertiliser N. In addition, the levels of nitrate, a potentially toxic component of the herbage (Wright & Davison 1964), were measured for all N lreatments.…”

Section: Received 22 August 1977mentioning

confidence: 99%

“…Field surveys in New Zealand (O'Hara & Fraser 1975) have shown that the climate that results in the accumulation of most nitrate in the plant is a pronounced drought which gives rise to nitrate accumulation in the rooting zone of the soil. If this drought is followed by dull rainy weather with warm soil temperatures, the nitrate is then taken up by the plant; these conditions are unlikely to be suitable for high carbohydrate production and the metaholism of this nitrate to plant amino acids (Wright & Davison 1964).…”

Section: Influence Of Season and Fertiliser N On Herbage Nmentioning

confidence: 99%

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Influence of fertiliser nitrogen on nitrogen fractions and nonstructural carbohydrates in grazed grass-clover herbage

Ross¹,

Molloy²,

Collie³

et al. 1978

New Zealand Journal of Agricultural Research

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Contents of Nand nonstructural carbohydrate fractions were measured over a year in herbage from a grazed ryegrass-white clover pasture, which had been fertilised with limeammonium nitrate at an annual rate of 0 (No), 112 (N112), and 448 (N448) kg N/ha. Total N wntent of the mixed herbage was often greater than 4% dry weight, and was highest in earlY spring and lowest in late summer. Levels in many cuts were increased significantly by the N448 treatment; the N112 treatment had little effect. The non-protein N and nitrate N contents were also highest in the N448 herbage, particularly in early spring; the level of nitrate N was also high in autumn. Most of the nitrate N occurred in the grass component. Total watersoluble carbohydrates, and those soluble in hot water but insoluble in cold water, usually comprised less than 12% and 1% dry w¢ight respectively of the mixed herbage. Total water-soluble carbohydrates were negatively and significantly correlated with both total N ;;nd "protein" N contents. The total N/total water-soluble carbohydrate ratio was, with one exception, greater than 0.3. No clear seasonal trends in the carbohydrate fractions were evident. Effects due to N treatments were generally small although sometimes significant for lhe hot-water-soluble fraction. The highest level of fertiliser N brought about high total N/total water-soluble carbohydrate ratios, and high herbage nitrate N contents, namely 0.66% dry weight in early spring and an average of 0.45% in August-January. The implications of these results for animal health are discussed. 231

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Section: Received 22 August 1977mentioning

confidence: 99%

Section: Influence Of Season and Fertiliser N On Herbage Nmentioning

confidence: 99%

Influence of fertiliser nitrogen on nitrogen fractions and nonstructural carbohydrates in grazed grass-clover herbage

Ross¹,

Molloy²,

Collie³

et al. 1978

New Zealand Journal of Agricultural Research

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“…O local primário para conversão do nitrato nesses produtos são as folhas verdes em crescimento (Ozmen 2003). Nitratos e nitritos podem estar presentes em altas concentrações em alguns alimentos, particularmente em gramíneas forrageiras no início do estágio vegetativo, fertilizadas com grandes quantidades de nitrogênio (Wright & Davison 1964;Radostits et al 2002;Kozloski 2009). No trato digestivo dos ruminantes, os nitratos são reduzidos a nitritos pelos microorganismos ruminais para a síntese de proteína microbiana e posteriormente à amônia para ser eliminada e utilizada para o metabolismo das bactérias e protozoários ruminais (Kozloski 2009).…”

Section: Introductionunclassified

Intoxicação espontânea e experimental por nitrato/nitrito em bovinos alimentados com Avena sativa (aveia) e/ou Lolium spp. (azevém)

et al. 2013

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ABSTRACT.-Jönck F., Gava A., Traverso S.D., Lucioli J., Furlan F. Epidemiological data, clinical and pathological findings of the spontaneous andexperimental poisoning by nitrate and nitrite in cattle fed oats (Avena sativa) and/or ryegrass (Lolium spp.), diphenylamine test, and the nitrate content in the samples of the pasture where the outbreaks occurred, are described. The disease occurs in different regions of the State of Santa Catarina, in which pastures have exuberant growth, after receiving excessive amounts of chemical and/or organic fertilizer, mainly when raining occurs after a period of dry wheather. The animals grazing these pastures quickly develop brown mucosa, tachypnea, staggering gait, frequent urination, bloating, lateral recumbency and death in few minutes or hours. At necropsy of four animals that died spontaneously, the main lesions found were brown mucosa, dark color of the blood (chocolate), intense red color of the skeletal muscles and of the left part of the myocardium. The experimental reproduction of the disease was performed in seven cattle, with pastures from four farms where the disease occurred. The animals were fed with fresh oats and ryegrass and/or hay of it. Four animals died, two became ill and recovered, and one was treated with 2mg/kg per body weight of methylene blue 1%, and one cattle did not show changes. Clinical signs and lesions of the diseased animals that died were similar to natural cases. Microscopic changes were not observed in spontaneous and experimental poisoning. The diphenylamine test was positive in all the farms where the outbreaks occurred. The chemical analysis performed on samples of the pastures from several farms, in which outbreaks of the disease occurred, ranged from 0.30to 3.36% of nitrate in the dry matter. The disease is associated with the ingestion of oats and/or ryegrass pastures heavily fertilized, which accumulates high levels of nitrate after a period of rain and is characterized by rapid breathing, dark-colored blood, brown mucous and rapid death.

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“…O nitrato ingerido a partir dos alimentos pode ser reduzido a nitrito (NO 2 -) no trato digestivo e ao chegar à corrente sangüínea oxida o ferro (Fe 2+ Fe 3+ ) da hemoglobina, produzindo a metahemoglobina. A metahemoglobina é incapaz de transportar oxigênio para a respiração celular, o que leva à doença conhecida como metahemoglobinemia, ou doença do "sangue azul" (WRIGHT & DAVISON, 1964).…”

Section: Conteúdo De Nitrato Em Alface Cultivada Em Hidroponia No Brasilunclassified

A questão do nitrato em alface hidropônica e a saúde humana

et al. 2008

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A questão do nitrato em alface hidropônica e a saúde humana The INTRODUÇÃOA alface (Lactuca sativa L.) é a hortaliça folhosa mais consumida no Brasil. Ela é fonte de vitaminas e sais minerais na alimentação da população brasileira e se destaca pelo baixo valor calórico, sendo bastante utilizada em dietas balanceadas e recomendada por nutricionistas. É uma hortaliça folhosa com grande importância alimentar pelo fato de ser tradicionalmente consumida crua, suprindo o organismo com a totalidade de seus componentes nutricionais, tais como: vitaminas -REVISÃO BIBLIOGRÁFICA -

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Nitrate Accumulation In Crops And Nitrate Poisoning In Animals

Cited by 292 publications

References 88 publications

Influence of fertiliser nitrogen on nitrogen fractions and nonstructural carbohydrates in grazed grass-clover herbage

Influence of fertiliser nitrogen on nitrogen fractions and nonstructural carbohydrates in grazed grass-clover herbage

Intoxicação espontânea e experimental por nitrato/nitrito em bovinos alimentados com Avena sativa (aveia) e/ou Lolium spp. (azevém)

A questão do nitrato em alface hidropônica e a saúde humana

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