Dry matter yield and nutritional value of Marandu grass under nitrogen fertilization and irrigation in cerrado in São Paulo

Dupas, Elisângela; Buzetti, Salatiér; Sarto, André Luís; Hernández, Fernando Braz Tangerino; Bergamaschine, Antônio Fernando

doi:10.1590/s1516-35982010001200006

Cited by 27 publications

(25 citation statements)

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“…Produtividades máximas de forragem foram obtidas com aplicações de lâminas de 267 e 269 mm para o outono e o inverno, respectivamente. Tal comportamento de resposta em forrageiras foi também observado por ALENCAR et al (2009b), LOPES et al (2014) e DUPAS et al (2010.…”

Section: Resultsunclassified

Produtividade e qualidade da brachiaria irrigada no outono/inverno

et al. 2016

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RESUMO:Um dos fatores que determinam os baixos índices zootécnicos na pecuária brasileira é a estacionalidade da produção das plantas forrageiras tropicais. A irrigação pode proporcionar aumento e estabilização da produtividade durante o outono e o inverno. Objetivou-se pelo presente estudo avaliar: a) a produtividade de massa seca e qualidade de forragem de Brachiaria brizantha, em função de lâminas de irrigação, no período do outono e do inverno; b) a umidade do solo e a temperatura do ar a fim de determinar seus efeitos na produtividade de forragem. O experimento foi conduzido na Fazenda Experimental da FCAV-Unesp, em Jaboticabal-SP. Utilizou-se de um sistema de aspersão em linha para estabelecer tratamentos com cinco lâminas de irrigação correspondentes a frações da evapotranspiração de referência (L 1 = 0,18; L 2 = 0,52; L 3 = 1,00; L 4 = 1,45 e L 5 = 1,67), em duas estações do ano: outono e inverno. A produtividade de forragem foi mais elevada no outono, e a resposta de produtividade à lâmina de água foi ajustada por uma função quadrática, atingindo produtividades máximas com lâminas de 267 e 269 mm para o outono e o inverno, respectivamente. Alto valor nutritivo da forragem fo i obtido em ambas as estações do ano, com incrementos nos teores de proteína bruta com acréscimo da lâmina de irrigação somente no outono. As lâminas de água não afetaram os teores de fibra detergente neutro da forragem. PALAVRAS-CHAVE: Brachiaria brizantha, forragem, irrigação. HERBAGE YIELD AND QUALITY OF IRRIGATED BRACHIARIA IN AUTUMN AND WINTER ABSTRACT:One of the reasons of low performance of the Brazilian livestock industry include the seasonal growth of tropical pasture grasses. Irrigated grasslands may have higher and most stable rates of yield during autumn and winter seasons. Therefore, we aimed at evaluating: a) Brachiaria brizantha dry matter yield and forage quality as a function of different water depths during the autumn and winter, and b) soil moisture and air temperature effects on forage yield. The experiment was carried out at the Experimental Farm of the University of São Paulo State (FCAV -UNESP), campus in Jaboticabal -SP, Brazil. We used a line-source sprinkler system to provide five levels of irrigation (L 1 = 0.18, L 2 = 0.52, L 3 = 1.00, L 4 = 1.45, and L 5 = 1.67). These water depths corresponded to fractions of reference evapotranspiration in both autumn and winter. Forage yield was higher in autumn and water depth responses were fitted by a quadratic function, reaching maximum values at 267 and 269 mm during autumn and winter, respectively. During the autumn, we observed a highly nutritive forage with crude protein increment by increasing water depths. However, water application had no effect on neutral detergent fiber content.

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Section: Resultsunclassified

Produtividade e qualidade da brachiaria irrigada no outono/inverno

et al. 2016

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“…The results obtained are in agreement with those found by Corrêa et al (2007), who observed an increase in DMY according to the increase of N doses (0, 25, 50, 100 and 200 kg ha -1 per cut). A number of studies have reported the positive effect of nitrogen fertilization on pasture (Benett et al, 2008, Dupas et al, 2010, Batista et al, 2014. However, Fernandes et al (2015) suggested that it is possible that the soil can supply the N requirement of the forage grasses depending on the soil type and management of the area, reaching a good productive level.…”

Section: Discussionmentioning

confidence: 99%

Application of different nitrogen doses to increase nitrogen efficiency in Mombasa guinegrass (Panicum maximum cv. mombasa) at dry and rainy seasons

Galindo¹,

Buzetti²,

Filho³

et al. 2017

Aust J Crop Sci

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Nitrogen is the nutrient that most influences productivity and pasture quality but nitrogen fertilization efficiency still needs to be increased. The objective of this work was to study the efficiency of nitrogen sources and doses (N) on the yield of Panicum maximum cv. Mombasa applied during rainy and dry periods. The soil of the experimental area is an ultisol with a sandy texture. The experimental design was a randomized block in a factorial scheme with four replications, two sources of nitrogen: urea and ammonium nitrate and five N doses (0, 50, 100, 150 and 200 kg ha -1 per cutting), in total 0, 300, 600, 900 and 1200 kg ha -1 per season-dry or rainy, respectively). The dry matter yield (DMY) and nitrogen use efficiency (NUE), agronomic efficiency (AE), recovery of applied nitrogen (RAN) and physiological efficiency (PE) were evaluated. The results showed that N source did not influence DMY, NUE, AE, RAN and PE. However, the N doses influenced DMY positively, and negatively NUE, AE, RAN and PE. Generally, the increase was occurred in DMY with the increase of N doses and decrease in NUE, AE, RAN and PE. As the N source did not influence the analyzed attributes, it is recommended to use urea, because it is a fertilizer with the highest N concentration and lowest cost per unit of nutrient, at a dose of 100 kg ha -1 per cut, favoring DMY gain. In addition this urea assists with the management and maintenance of the Mombasa guineagrass.

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“…in the non-irrigated experiment, that is, with no statistically significant difference [37]. In the dry season, the average DM yields were 8.1 t ha −1 in the irrigated treatment and 4.4 t ha −1 under non-irrigated treatment.…”

Section: Right Timementioning

confidence: 79%

Best Management Practices (BMPs) for Nitrogen Fertilizer in Forage Grasses

Serra¹,

Marchetti²,

Dupas³

et al. 2018

New Perspectives in Forage Crops

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There is a concern about the growing population and limitation in natural resources which are taking the population to direct its agricultural systems into a more productive and efficient activity, looking to avoid a negative impact on the surrounding environment. The industry energy expended to produce nitrogen (N)-fertilizer is considered an indirect consumption of energy in agriculture, which is higher with an increasing forage yield. Nitrogen is the key nutrient associated with high-yielding production in forage grass and grain crops. The aim of this chapter is to introduce the best management practices (BMPs) for N-fertilizer application in forage grasses to improve N-use efficiency, since the most economical way to feed livestock is forage plants where its potential biomass production is not well explored. The BMPs basically follow three management practices: (1) soil nutrient availability and forage requirement, (2) fertilizer application, and (3) decrease in nutrient losses from soil. In order to take a decision on applying N-fertilizer to accomplish forage grasses production with social, economic, and environmental benefits, the N-fertilizer use in forage grasses is going to follow the "Right rate, Right source, Right place, and Right time (4R) nutrient stewardship." The application of the 4R's nutrients stewardship is directly associated with economic, social, and environmental impact. The capacity of the 4R's implementation worldwide turns into a best guide to improve the striving of better N-use efficiency in forage grass. The 4R's are interrelated; thus, the recommendation of N-fertilizer rates cannot be prescribed without the combination of the 4R's where a whole system to be followed should be considered to decide about N-fertilizer in pasture. Consequently, any decision in one of the 4R's is going to affect the expected N-fertilizer results and dry matter production.

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Dry matter yield and nutritional value of Marandu grass under nitrogen fertilization and irrigation in cerrado in São Paulo

Cited by 27 publications

References 6 publications

Produtividade e qualidade da brachiaria irrigada no outono/inverno

Produtividade e qualidade da brachiaria irrigada no outono/inverno

Application of different nitrogen doses to increase nitrogen efficiency in Mombasa guinegrass (Panicum maximum cv. mombasa) at dry and rainy seasons

Best Management Practices (BMPs) for Nitrogen Fertilizer in Forage Grasses

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