Potassium Fertilization of Intensively Manage Grasses under Humid Tropical Conditions<sup>1</sup>

Vicente-Chandler, José; Pearson, R. W.; Abruña, Fernando; Silva, Servando

doi:10.2134/agronj1962.00021962005400050023x

Cited by 25 publications

(40 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This absorption process depends on the plant species, chemical characteristics of the soil solution, of the soil-root interface and the nutrition background of the plant (Subasinghe, 2006). It was previously reported that nitrate absorption stimulated potassium absorption (Zsoldos et al, 1990;Subasinghe, 2006).…”

Section: Resultsmentioning

confidence: 93%

See 1 more Smart Citation

Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

Megda

Monteiro

2010

R. Bras. Zootec.

View full text Add to dashboard Cite

-The objective of this work was to study morphogenic characteristics, and dry matter production of roots and shoots of marandu palisadegrass (Brachiaria brizantha cv. Marandu) submitted to combinations of nitrogen and potassium, in a nutritive solution, employing silica as substrate. The experiment was carried out in a greenhouse during the summer. It was used a 5 2 fractionated factorial scheme with 13 combinations of nitrogen and potassium, which were distributed in a randomized block design, with four replications. The nitrogen × potassium interaction was significant for the number of tillers and leaves, for leaf area, for shoots and root section dry mass, for total length and surface and specific length and surface in the roots. Production of aerial part dry mass positively correlated with the number of tillers and leaves and grass leaf area.Nitrogen rates modulated the root system development, and the root specific length and surface decreased when high rates of nitrogen and potassium were supllied. Nitrogen and potassium influence Marandu palisadegrass morphogenic characteristics, which are determinant for grass dry matter production.Key Words: Brachiaria brizantha, leaf, nutrient solution, root, shoot, tiller Suprimento combinado de nitrogênio com potássio para o capim-marandu:características morfogênicas e produtivas RESUMO -Objetivou-se estudar as características morfogênicas e a produção de massa seca da parte aérea e das raízes do capim-marandu (Brachiaria brizantha cv. Marandu) submetido a combinações de nitrogênio e potássio, em solução nutritiva, empregando-se sílica como substrato. O experimento foi realizado em casa de vegetação, no verão. Utilizou-se o esquema fatorial 5 2 fracionado, com 13 combinações de nitrogênio e potássio, distribuídas em delineamento de blocos ao acaso, com quatro repetições. A interação nitrogênio × potássio foi significativa para número de perfilhos e de folhas, área foliar, massa seca da parte aérea e de raízes, comprimento e superfície totais e comprimento e superfície específicas nas raízes. A produção de massa seca da parte aérea correlacionou-se positivamente com número de perfilhos e de folhas e área foliar do capim. As doses de nitrogênio se mostraram moduladoras do desenvolvimento do sistema radicular e o comprimento e a superfície específicos diminuíram quando fornecidas altas doses desses nutrientes. O nitrogênio e o potássio influenciam as características morfogênicas do capim-marandu, que são determinantes da produção de massa seca da gramínea.

show abstract

Section: Resultsmentioning

confidence: 93%

“…Nitrogen and potassium supply increase yield of forage grasses as Vicente-Chandler et al (1962), Carvalho et al (1991), Monteiro et al (1995), Ferragine & Monteiro (1999), Lavres Jr. & Monteiro (2002) and Lavres Jr. et al (2004), among others, have demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

Megda

Monteiro

2010

R. Bras. Zootec.

View full text Add to dashboard Cite

show abstract

“…Vicente-Chandler et al (1962), estudando a fertilização potássica em gramíneas observaram que, as mais elevadas produções das plantas forrageiras estavam associadas à concentração de potássio de 15 a 20 g kg -1…”

Section: Proteína Bruta E Composição Mineral Das Forrageirasunclassified

Produção de forragem e valor nutritivo de espécies forrageiras sob condições de pastejo, em solo de várzea baixa do Rio Guamá<A HREF="#nt1"></A>

Abreu¹,

Fernandes²,

Rodrigues

2006

Acta Amaz.

View full text Add to dashboard Cite

RESUMOEste estudo teve os objetivos avaliar a produção de forragem, o valor nutritivo através de proteína bruta e da composição de macro e micronutrientes na canarana de Paramaribo (Echinochloa polystachya H.B.K) e na canarana erecta lisa (Echinochloa pyramidalis Lam), introduzidas em áreas inundáveis de várzea baixa do rio Guamá, Campus da Universidade Federal Rural da Amazônia, em Belém (PA). As forrageiras haviam sido formadas há três anos e mantidas sob pastejo rotativo, antes e durante o experimento. O delineamento experimental adotado foi o inteiramente ao acaso, em um esquema fatorial 2x4 (duas espécies e quatro períodos), com seis repetições. As amostras de forragem foram cortadas a 10 cm do solo e utilizou-se uma área de 0,25 m 2 como unidade amostral. As épocas de coleta foram: maio (época1), agosto (época2) e novembro/2002 (época3) e fevereiro/2003 (época4). As características analisadas foram: massa fresca, massa seca, teores de nitrogênio, proteína bruta, fósforo, potássio, sódio, cálcio, magnésio, enxofre, ferro, manganês, zinco, cobre e boro. A disponibilidade de forragem diminuiu com o tempo de uso da pastagem. Os teores médios de proteína bruta, N, P, K e Na, Fe, Zn e Cu foram maiores nas épocas mais chuvosas, enquanto que os teores de Ca, Mg, S, Mn e B foram mais elevados nas épocas menos chuvosas. A canarana erecta lisa apresentou menor decréscimo de matéria seca durante os períodos estudados e maior valor nutritivo, no entanto, a canarana de Paramaribo foi a mais produtiva. No entanto, as duas espécies forrageiras apresentaram uma redução expressiva da produção, sugerindo que o tempo de pastejo de 12 dias e/ou o retorno a cada 40 dias constituíram um manejo inadequado. PALAVRAS-CHAVETerra inundável, avaliação, Echinochloa polystachya, Echinochloa pyramidalis. Forage production and nutritive value of forage species under pasture conditions in lowland soils of the Guamá River ABSTRACT This paper had the objective of evaluating forage production, the nutritive value through crude protein, and the macro and micronutrient composition of the canarana de Paramaribo (Echinochloa polystachya H.B.K) and the canarana erecta lisa (Echinochloa pyramidalis Lam) introduced in floodable areas on low and flat lands of the Guamá river, at Universidade Federal Rural da Amazônia Campus, in Belém (PA). The forage plants had been developed for three years and kept under rotative pasture,before and during the experiment. The experimental design adopted was totally randomized, in a factorial 2x4 (two species and two periods) scheme, with six repetitions. The forage samples were cut 10 cm above the soil using a 0,25 m 2 as the sample unit. The collection periods were: May (period1), August (period2) and November/2002 (period3) and February/2003 (period4). The aspects analyzed were: fresh mater, dry mater, nitrogen tenor, crud protein, phosphorus, potassium, sodium, calcium, magnesium, manganese, iron, zinc, copper and borum

show abstract

“…The effect of P and K on production has not been as well established. Some studies have reported significant improvements with rates ofP up to 100 kg ha-1 (1,16), while others have reported no significant effect ofP on yield (22,26). Application rates forK as high as 185 kg ha-1 year-' have significantly increased yields (I , 24,26,29), yet limited or, in some cases, negative responses have also been observed ( 14,17).…”

mentioning

confidence: 99%

“…Some studies have reported significant improvements with rates ofP up to 100 kg ha-1 (1,16), while others have reported no significant effect ofP on yield (22,26). Application rates forK as high as 185 kg ha-1 year-' have significantly increased yields (I , 24,26,29), yet limited or, in some cases, negative responses have also been observed ( 14,17). Crespo and Cuesta (7) recently suggested the necessity of concurrent N, P, and K application for maximum production of digitgrass, but studies comparing rates ofN-P-K applied concurrently are limited (17,23).…”

mentioning

confidence: 99%

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹

Mooso¹,

Jolley

1983

Agronomy Journal

View full text Add to dashboard Cite

‘Pangola’ digitgrass (Digitaria decumbens Stent.) is an important tropical and subtropical forage species which responds dramatically to N fertilization. Responses to the application of P and K, however, or the combinations of N, P, and K are not as clearly defined. Its response to N, P, and K applied in solution has not been established. A 2‐year study to compare the effect of the application of liquid and solid N‐P‐K (9:1:4) fertilizers on digitgrass production and nutrient uptake was conducted on a Wabasso sand (siliceous, hyperthermic, Alfic Haplaquod) on the Deseret Ranches in Central Florida. There was a positive linear relationship between the amount of N‐P‐K fertilizer applied and the amount of forage produced. The concentrations of N and K were positively affected by increased N‐P‐K levels while P concentration was negatively affected. A positive linear relationship was also observed between the uptake of N, P, and K and the rate of application. The liquid fertilizer produced an average of 20.9 and 21.4% less forage than the solid for 1980 and 1981, respectively. Solid fertilizer maintained a higher N concentration in the forage than the liquid, but no differences in P and K concentrations were observed with the two forms of fertilizer. The forage treated with solid fertilizer averaged 24, 35, and 59% higher relative uptake of N, P, and K than the forage treated with liquid fertilizer, respectively. Under the conditions of the study, ammonia volatilization was probably the major reason for lower yields, N concentrations, and N uptake from the use of liquid fertilizer. The lower uptake of P and K with liquid fertilizer was associated with the lower yields obtained with this source.

show abstract

Potassium Fertilization of Intensively Manage Grasses under Humid Tropical Conditions¹

Cited by 25 publications

References 2 publications

Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

Produção de forragem e valor nutritivo de espécies forrageiras sob condições de pastejo, em solo de várzea baixa do Rio Guamá<A HREF="#nt1"></A>

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹

Contact Info

Product

Resources

About

Potassium Fertilization of Intensively Manage Grasses under Humid Tropical Conditions1

Cited by 25 publications

References 2 publications

Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

Produção de forragem e valor nutritivo de espécies forrageiras sob condições de pastejo, em solo de várzea baixa do Rio Guamá<A HREF="#nt1"></A>

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers1

Contact Info

Product

Resources

About

Potassium Fertilization of Intensively Manage Grasses under Humid Tropical Conditions¹

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹