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| Registros recuperados: 22 | |
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| Sánchez,E; Ávila-Quezada,G; Gardea,AA; Ruiz,JM; Romero,L. |
| The objective of this work was to determine the effect of deficiency versus toxicity of N on biosynthesis of proline in fruits of green bean plants (Phaseolus vulgaris L. cv. Strike). Nitrogen was applied to the nutritive solution in the form of NH4NO3 at 1.5 mM (N1), 3.0 mM (N2), 6.0 mM (N3, optimal level), 12.0 mM (N4), 18.0 mM (N5), and 24.0 mM (N6). Nitrogen deficiency (N1 and N2) was characterized by having lower proline accumulation in pods and seeds, mainly because proline degradation was stimulated by the enzyme proline dehydrogenase. On the other hand, N toxicity (N4, N5, and N6) was characterized for accumulation of greater amounts of proline in pods and seeds due primarily to the greater activity of the enzyme... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L; Proline metabolism; Green bean; Nitrogen; Deficiency; Toxicity. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100013 |
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| Lavres Junior,José; Reis,André Rodrigues; Rossi,Mônica Lanzoni; Cabral,Cleusa Pereira; Nogueira,Neusa de Lima; Malavolta,Eurípedes. |
| The deleterious effects of Mn stress on many species have been studied, mainly concerning biochemical, physiological and growth parameters of plants. However, there are few studies relating the anatomical and ultrastructural changes in response to manganese (Mn) nutritional disorders, This study examined the leaf ultrastructure of Mn-inefficient (IAC-15, Santa Rosa) and Mn-efficient (IAC-Foscarin 31) soybean (Glycine max L.) genotypes in response to three rates of Mn (0.5, 2 and 200 µmol L-1) in the nutrient solution. Symptoms of Mn deficiency developed 12 days after transplanting in IAC-15 and Santa Rosa, followed by IAC-Foscarin 31 on the 15th day. Only IAC-15 and Santa Rosa leaves showed symptoms of Mn toxicity. The Mn concentration in leaves ranged... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chloroplast; Deficiency; Plant nutrition; Toxicity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000300006 |
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| Guarçoni,André; Sobreira,Fabrício Moreira. |
| ABSTRACT The methods developed for determination of lime requirements (LR) are based on widely accepted principles. However, the formulas used for calculation have evolved little over recent decades, and in some cases there are indications of their inadequacy. The aim of this study was to compare the lime requirements calculated by three classic formulas and three algorithms, defining those most appropriate for supplying Ca and Mg to coffee plants and the smaller possibility of causing overliming. The database used contained 600 soil samples, which were collected in coffee plantings. The LR was estimated by the methods of base saturation, neutralization of Al3+, and elevation of Ca2+ and Mg2+ contents (two formulas) and by the three calculation algorithms.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PH; Calcium; Magnesium; Deficiency; Overliming. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100504 |
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| BRUM, P. A. R. de; SOUZA, J. C. de; COMASTRI FILHO, J. A.; ALMEIDA, I. L. de. |
| O trabalho objetivou identificar os níveis de cobre, zinco, manganês e ferro em três unidades geomórficas, cinco espécies forrageiras, e no fígado de vacas de corte em lactação na sub-região dos Paiaguás no Pantanal Mato-grossense. Independentemente de unidade geomórfica e espécies forrageiras, os níveis médios de cobre no solo variaram de 0,3 ppm a 0,7 ppm, nas forrageiras de 2,0 ppm a 3,1 ppm e no fígado de 155,3 ppm a 339,9 ppm; zinco no solo de 0,7 ppm a 1,6 ppm, nas forrageiras de 5,6 ppm a 7,1 ppm, e no fígado de 44,5 a 233,8 ppm; manganês no solo de 17,0 ppm a 26,0 ppm, nas forrageiras de 272,7 ppm a 477,5 ppm e no fígado de 31,5 ppm a 35,2 ppm; ferro no solo de 88,9 ppm a 174,9 ppm, nas forrageiras de 73,0 ppnt a 472,8 ppm e no fígado de 579,5 a... |
| Tipo: Artigo de periódico |
Palavras-chave: Planta forrageira nativa; Bovinos; Brasil; Mato Grsso; Deficiency; Mineral; Cattle; Nutrition. |
| Ano: 1987 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/591600 |
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| Cortez Hernández, Graciano. |
| En la Mixteca Poblana, predominan suelos calcáreos que por su pH alcalino impiden que las plantas puedan absorber los nutrimentos como hierro y zinc, ocasionando la clorosis férrica, afectando los cultivos de esta región, tales como: caña de azúcar, sorgo, maíz, frijol e incluso los árboles frutales, repercutiendo en el desarrollo, rendimiento y en casos severos la muerte de la planta. En esta región está ubicado el ingenio azucarero de Atencingo que genera anualmente 45 mil toneladas de desechos orgánicos (cachaza). El objetivo de esta investigación fue evaluar el efecto de la incorporación de compost de cachaza al suelo en la corrección de clorosis férrica y rendimiento de sorgo. Se incorporó compost de cachaza a razón de cero, cinco y diez t ha-1 en... |
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Palavras-chave: Dosis de fertilización; Compost de cachaza; Deficiencia; Nutrimentos; Fertilización orgánica; Dose of fertilization; Compost; Filter cake; Deficiency; Nutrients; Organic fertilizer; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/335 |
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| Ortolani,Enrico Lippi. |
| Eight five-month-old male lambs received a diet with marginal levels of sodium (0.5 g Na/kg DM); four lambs were given a single dose of infective Haemonchus contortus larvae (4,600 L3/ head) and four were kept uninfected. The lambs were slaughtered 30 days after the infection. Sodium concentration was determined in the abomasal fluid at the slaughter. The balance between intake and faecal excretion of sodium was evaluated. Saliva was collected at days zero, 20 and 30 to determine the Na:K ratio. The mean total worm burden retrieved was 1390. The infection increased abomasal sodium concentration (p< 0.001) and reduced faecal sodium excretion (p<0.02), but there was not a significant relationship between worm burden and abomasal (p >0.082) or faecal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Haemonchus contortus; Infection; Sheepj; Sodium; Balance; Deficiency. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782000000300026 |
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| Louvandini,Helder; McManus,Concepta; Dallago,Bruno Steffano; Machado,Bruno de Oliveira; Antunes,Dalton Araujo. |
| The aim of this study was to evaluate the performance of sheep supplemented with phosphorus (P) using carcass traits and analysis of 12th rib. Twenty male lambs weighing 13.88 ± 2.51 kg and grazing Andropogon gayanus pasture were divided in two treatments of 10 animals each. In group P, animals were supplemented with 3 g phosphorus/animal/day, while in group NP no P supplementation was given. After 82 days the animals were slaughtered and carcass measurements were taken. The 12th rib was also removed for analysis. No significant differences in body weight, carcass yield, or commercial cut weights were found between both treatments, except for liver and kidneys that were heavier in the supplemented group (p=0.0954). The 12th rib analysis showed that the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lambs; Deficiency; Growth; Mineral; Santa Inês. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982006000200030 |
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| CARDOSO, M. O.; QUEIROZ, M. A. de; SOUZA, R. F.. |
| Cinco cultivares de tomateiro (IPA-5, IPA-L, Agrocica Botu-13, Petomech II e Rossol), de crescimento determinado, foram avaliados quanto a incidencia da podridao apical (PA), em diferentes niveis de calcio (Ca). Alem do solo sem calagem, foram utilizados dois tratamentos em que o solo era submetido a calagem com 83% e 61% de saturacao de bases. O experimento foi conduzido em casa de vegetacao no CPATSA-EMBRAPA, Petrolina, PE, em blocos casualizados, num esquema fatorial 5 x 3, sendo cada parcela constituida por 2 plantas/vaso, com tres repeticoes. Verificou-se efeito do aumento dos niveis de Ca na reducao da PA, porem nao houve interacao significativa entre genotipos x niveis de Ca. Os genotipos Petomech II e IPA-L exibiram, respectivamente, maior e menor... |
| Tipo: Artigo de periódico |
Palavras-chave: Melhoramento genetico; Tomato; Variety; Blosson-end-rot; Deficiency; Tomato breeding; Cálcio; Deficiência; Lycopersicon Esculentum; Podridão Apical; Tomate; Variedade; Solo; Calcium; Soil. |
| Ano: 1995 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121904 |
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| CARDOSO, M. O.; QUEIROZ, M. A. de; SOUZA, R. F.. |
| Cinco cultivares de tomateiro (IPA-5, IPA-L, Agrocica Botu-13, Petomech II e Rossol), de crescimento determinado, foram avaliados quanto a incidencia da podridao apical (PA), em diferentes niveis de calcio (Ca). Alem do solo sem calagem, foram utilizados dois tratamentos em que o solo era submetido a calagem com 83% e 61% de saturacao de bases. O experimento foi conduzido em casa de vegetacao no CPATSA-EMBRAPA, Petrolina, PE, em blocos casualizados, num esquema fatorial 5 x 3, sendo cada parcela constituida por 2 plantas/vaso, com tres repeticoes. Verificou-se efeito do aumento dos niveis de Ca na reducao da PA, porem nao houve interacao significativa entre genotipos x niveis de Ca. Os genotipos Petomech II e IPA-L exibiram, respectivamente, maior e menor... |
| Tipo: Artigo de periódico |
Palavras-chave: Melhoramento genetico; Tomato; Variety; Blosson-end-rot; Deficiency; Tomato breeding; Cálcio; Deficiência; Lycopersicon Esculentum; Podridão Apical; Tomate; Variedade; Solo; Calcium; Soil. |
| Ano: 1995 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/131661 |
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| Sánchez,E.; Ávila-Quezada,G.; Gardea,A.A.; Muñoz,E.; Ruiz,J.M.; Romero,L.. |
| The objective of this work was to determine the effect of different P doses on nitrogen assimilation in roots and leaves of green beans plants (Phaseolus vulgaris L. cv. Strike). Phosphorus was applied in the nutrient solution as H3PO4, at the nutrient doses of: P1 = 0.40 mM; P2 = 0.80 mM; P3 = 1.60 mM; P4 = 3.20 mM; P5 = 4.80 mM, and P6 = 6.40 mM P. Our results indicate that both P toxicity and deficiency gave similar responses to N assimilation. Phosphorus and NO3 - interacted on the absorption and translocation processes affecting N assimilation. The deficiency (P1), and toxicity (P6) treatments, diminished root absorption of NO3- in 15% and 36%, respectively, respect to the optimum dose (P3), thus reducing nutrient availability for assimilation. This... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L.; Nitrogen metabolism; Green bean; Phosphorus; Deficiency; Toxicity. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000100003 |
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| SOUSA, J. C. de; GOMES, R. F. C.; REZENDE, A. M.; ROSA, I. V.; CARDOSO, E. G.; GOMES. A.; COSTA, F. P.; OLIEIRA, A. R. de; COELHO NETO, L.; CURVO, J. B. E.. |
| Para verificar possiveis deficiencias minerais em novilhos nelorados em pastagem de capim-coloniao (Panicum maximum Jacq.) no sudeste do Estado do Mato Grosso do Sul, foi feito um estudo com duracao de 336 dias. Foram usados 200 novilhos distribuidos nos seguintes tratamentos: A: NaCl++P + microlementos; B: mistura comerical; C: NaCl + P; e D: NaCl. Os animais dos tratamentos C e D comecaram a emagrecer logo apos o nicio do experimento e, com o passar dos meses, varios deles apresentaram magreza, diarreia e pelo aspero, morrendo apos periodo de tempo variavel. Foram removidos, por causa da morte ou caquexia, 9 e 24 animais dos tratamentos C e D, respectivamente. Nos tratamentos A e B nao houve animais que mostrassem os sinais clinicos descritos para os... |
| Tipo: Artigo de periódico |
Palavras-chave: Micronutrientes; Deficiency; Micronutrients; Panicum maximum Jacq; Bovino; Cálcio; Deficiência; Fósforo; Calcium; Cattle; Phosphorus. |
| Ano: 1983 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113491 |
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| Registros recuperados: 22 | |
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