Morphological, Productive, and Chemical Traits of Xaraés Grass: Nitrogen Topdressing Versus Inoculation With Diazotrophic Bacteria

Dias, Marcio de Souza; Florentino, Ligiane Aparecida; Rabêlo, Flávio Henrique Silveira; Rezende, Adauton Vilela de; Souza, Flávia Romam da Costa; Borgo, Lucélia

doi:10.1590/1089-6891v20e-38586

Cited by 2 publications

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References 19 publications

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“…In the most diverse production systems, nitrogen influences plant development to a greater extent than other nutrients, being essential for forage production. Its availability is a limiting factor and has a high cost (Sollenberger, 2008; Dias et al ., 2019). Thus, the use of nitrogen fertilizer has intensified, notably due to the need to increase production per unit area.…”

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confidence: 99%

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

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The inoculation with Azospirillum brasilense has the potential to reduce the use of mineral fertilizers with efficient capacity to promote plant growth and yield. Most studies on the Azospirillum–plant association have been conducted on cereals and annual grasses. More studies are needed in perennial pastures, such as bermudagrass (Cynodon dactylon (L.) Pers.) that require substantial nitrogen (N) fertilization to maximize their production potential. Therefore, pastures based on Tifton 85 bermudagrass in association with annual ryegrass (Lolium multiflorum Lam.), which were inoculated with A. brasilense and fertilized with increasing amounts of N fertilizer and grazed by lactating Holstein cows were evaluated. Three grazing systems were evaluated: (i) Tifton 85, inoculated + 180 kg N/ha per year; (ii) Tifton 85 + 230 kg N/ha per year; and (iii) Tifton 85 + 280 kg N/ha per year. Forage samples were collected before and after grazing to evaluate the responses of the plants and animals. The forage yields of the systems were 21.0, 20.8 and 22.1 t DM/ha per year and the stocking rates were 3.9, 3.8 and 4.0 animal unit/ha per day, respectively. Crude protein, total digestible nutrients and neutral detergent fibre concentrations were 162, 560 and 667 g/kg, respectively. Inoculation in pastures planted with Tifton 85 bermudagrass in combination with ryegrass (plus 180 kg N/ha per year) had a positive effect, providing forage yield and nutritional value equivalent to those with fertilization with 230 kg N/ha per year.

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Section: Introductionmentioning

confidence: 99%

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

et al. 2022

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“…A possible destination for the sawdust is the agriculture. In Mato Grosso state this sector occupying an area of 23.02 million ha for animal grazing and is favorable to using new low-cost inputs such as the teak sawdust (Dias et al, 2019;IBGE, 2017).…”

Section: Introductionmentioning

confidence: 99%

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2021

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Tectona grandis L.f. (Teak) is a highly cultivated forest species in Brazil. Its wood is appreciated worldwide and used for different purposes. When industrially processed, it generates a large amount of sawdust, a waste that has limited reuse and accumulates in the industrial yards. The aim of this study was to evaluate the effect of fresh teakwood sawdust on the development of Urochloa brizantha (Hochst. ex A.Rich.) R.D.Webster cv. Xaraés in a nursery. The treatments consisted of concentrations of 0, 5, 10, 20, 33 and 50% of sawdust, arranged in four randomized blocks in split-plots. At 45, 75 and 120 days, plant heigh (h), average tillers diameter (d), number of live (nll) and dead leaves per plant, fresh and dry mass of shoots and roots, and Dickson's quality index (dqi) were measured. Data were subjected to analysis of variance and analyzed by the Tukey test, when the difference was significant at 120 days after planting. Regression was used to model the performance of the variables throughout the experimental period. There was a decrease in h growth, d, nll, fresh and dry mass of shoots and roots and in the dqi of the cv. Xaraés as it increased to concentration of wood sawdust in the substrate. This negative effect can be attributed to the high C/N ratio of sawdust (196/1), which influences the decomposition of organic matter. In addition, the possible Teak allelopathic effects, which are the subject of other studies, should be considered. Unlike the other variables, number of live leaves was not influenced by the treatment with 5% sawdust. Teakwood sawdust has negative effects on the U. brizantha cv. Xaraés development. Desenvolvimento deUrochloa brizantha (Hochst. ex A.Rich.) R.D.Webster cv. Xaraés sob diferentes concentrações de serragem de madeira de teca RESUMO: A Tectona grandis L.f. (teca) é uma espécie florestal muito cultivada no Brasil. Sua madeira é apreciada mundialmente e utilizada para diversas finalidades. Quando processada industrialmente, gera grande quantidade de serragem, resíduo que possui reaproveitamento limitado e se acumula nos pátios das industriais. O objetivo deste estudo foi avaliar o efeito da serragem da madeira de teca in natura sobre o desenvolvimento de Urochloa brizantha (Hochst. ex A.Rich.) R.D.Webster cv. Xaraés em viveiro. Os tratamentos constaram das concentrações de 0, 5, 10, 20, 33 e 50% de serragem, dispostos em quatro blocos casualizados em parcelas subdivididas. Aos 45, 75 e 120 dias foram mensurados a altura de plantas (h), o diâmetro médio de perfilhos (d), o número de folhas vivas (nll) e mortas por planta, a massa fresca e seca da parte aérea e das raízes e o índice de qualidade de Dickson (dqi). Os dados foram submetidos à análise de variância e analisados pelo teste de Tukey, quando a diferença foi significante aos 120 dias após o plantio. Utilizou-se a regressão para modelar o desempenho das variáveis alo longo do período experimental. Constatou-se uma diminuição do crescimento em h, d, nll, massa fresca e seca da parte aérea e das raízes e no dqi da cv. Xar...

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Morphological, Productive, and Chemical Traits of Xaraés Grass: Nitrogen Topdressing Versus Inoculation With Diazotrophic Bacteria

Cited by 2 publications

References 19 publications

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

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