Características Morfogênicas E Estruturais Do Capim-Marandu Sob Irrigação E Adubação

Magalhães, João Avelar; Carneiro, Maria Socorro de Sousa; Andrade, A. C.; Rodrigues, B. H. N.; Costa, Newton Newton de Lucena; Santos, F. J. de S.; Edvan, Ricardo Loiola; Neto, Raimundo Bezerra de Araújo

doi:10.15628/holos.2016.4514

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…In contrast to our results, however, a study on B. brizantha cv. Marandu did not fi nd signifi cant interactions between irrigation depth and nitrogen fertilization on leaf elongation rate (MAGALHÃES et al, 2016).…”

Section: Resultsmentioning

confidence: 81%

Agronomic features of elephant grass (Pennisetum purpureum Schum) cv. Roxo under irrigation

Carvalho

Arruda

Abreu

et al. 2018

SCA

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This study aimed to evaluate how different irrigation water depths influence the agronomical features of elephant grass (Pennisetum purpureum Schum) cv. Roxo. Grass was cultivated in a pasture belonging to the Bovine Sector of the National Agrotechnical School of Caceres -MT. The experiment was a block design with five treatments and four repetitions. Treatments consisted of five water depths: 0 = 0% of available water (AW), 1 = 21% of AW, 2 = 34% of AW, 3 = 74% of AW, and 5 = 100% of AW. Evaluated features were production (dry matter ha -1 ), plant height, leaf/steam ratio, and stem diameter. Dry matter production of cuts from May and July increased linearly with increasing water depth (P < 0.05). Plant height increased linearly as water depth increased in the cuts of May and September, while the height of July cuts was 71.76 cm under an irrigation depth of 390.77 mm. In May, July, and September cuts, leaf percentage decreased linearly as water depth increased (P < 0.05). An increase of 1 mm in water depth reduced leaf percentage by 0.0936% (May), 0.0295% (July), and 0.0122% (September). Our results indicate that to improve dry matter production, May, July, and September cuts should be irrigated with water depths of 56.03 mm, 601.78 mm, and 577.65 mm, respectively. Key words: Forage growth. Plant height. Productivity. ResumoObjetivou-se com este trabalho avaliar o efeito de diferentes lâminas de irrigação em capim-elefante (Pennisetum purpureum Schum. cv. Roxo) sobre as características agronômicas. O capim foi cultivado em área de capineira da Escola Agrotécnica Federal de Cáceres -MT (EAFC), 16°13'42" latitude sul e 57°40'51" longitude Oeste de Greenwich. O delineamento experimental foi em blocos casualizados, com quatro repetições. Os tratamentos constaram da aplicação de cinco lâminas de irrigação, lâmina 0: 0% CC (Capacidade de campo), lâmina 1: 21% CC, lâmina 2: 34% CC, lâmina 3: 74% CC, lâmina 4: 100% CC de água disponibilizada. Foram avaliadas a produção de matéria seca (MS), altura da planta (H), porcentagem de lâmina foliar (% LF), relação lâmina foliar:colmo (F:C) e diâmetro do colmo. Nos cortes de maio e julho o aumento da água disponibilizada via irrigação promoveu incremento linear (P < 0,05) na produção de MS, onde cada 1 mm de água promoveu incremento de 60,11 kg MS ha -1 no mês de maio e 7,43 kg MS ha -1 no mês de julho. A (H) aumentou linearmente com o acréscimo de água disponibilizada da irrigação, atingindo a altura máxima de 56,34 cm com a lâmina d`água de 56,03 mm em maio e 63,89 cm com a lâmina d`água de 713,11 mm, enquanto no corte de julho a altura foi de 71,76 cm com a lâmina de irrigação de 390,77 mm. O aumento da quantidade de água disponibilizada promoveu redução linear (P < 0,05) da % LF no capim-elefante nos cortes de maio, julho e setembro, em que cada 1,0 mm de água de irrigação aplicada reduziu a (% LF) em 0,0936; 0,0295 e 0,0122%, respectivamente. Desta forma, do ponto de vista da produção MS ha -1 , sugere-se para o corte realizado no mês de maio lamina d`água de 56,03...

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Section: Resultsmentioning

confidence: 81%

Agronomic features of elephant grass (Pennisetum purpureum Schum) cv. Roxo under irrigation

Carvalho

Arruda

Abreu

et al. 2018

SCA

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“…Marandu, the leaf senescence rate was also higher in pastures maintained with higher cutting heights. Growing nitrogen rates can increase the senescence rate [31], as mentioned in reference [23] could conclude that the production of dead material was increasing linearly to fertilization, increasing from 3.46 g pot -1 to 8.50 g pot -1 , at doses of 0 and 200 mg dm -3 , respectively.…”

Section: Agronomic Traits Of B Brizantha CV Piatãmentioning

confidence: 84%

Agronomic and Bromatological Traits of Brachiaria brizantha cv. Piatã as Affected by Nitrogen Rates and Cutting Heights

Avelino

Faria

Penso

et al. 2019

JEAI

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This study aimed to evaluate the bromatological traits of Brachiaria brizantha cv. Piatã submitted to different cutting heights and nitrogen (N) rates. A randomized complete block design with sixteen treatments and four replications was used. The treatments arranged in 4x4 factorial arrangement, comprised four cutting heights (8, 16, 24 and 32 cm) and nitrogen rates (0, 100, 200, 300 kg N ha-1). N rates were applied after a standardization cutting. Agronomic traits comprised number of tillers, dry mass, leaf blade pseudocolus ratio and amount of senescent material. Bromatological traits of morphological components leaf blade and pseudostem comprised crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and mineral matter (MM). In the first and second cuttings, maximum yields were obtained at 16 and 32 cm cutting heights combined with N rates of 180.5 and 230.5 kg ha-1, respectively. No interaction was observed between N rates and cutting heights. It was concluded that 16 and 24 cm cutting heights combined with N rates of 200 and 300 kg ha-1 improved agronomic and bromatological traits of Brachiaria with a better efficiency in pasture system.

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“…In Urochloa brizantha cv. Marandu, leaf elongation, appearance, and final length decreased with reduced irrigation (30) .…”

Section: Discussionmentioning

confidence: 90%

Estructura del pasto forrajero con cultivares de Urochloa brizantha bajo sombra

Janusckiewicz

Paiva

Fernandes

et al. 2021

Rev. Mex. Cienc. Pecu.

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This study evaluated the structure of swards planted with Urochloa brizantha cv. BRS Paiaguas and BRS Piata under the eucalyptus shading system, fertilized via foliar at the beginning of the dry and rainy seasons. The experiment followed a randomized block design with a 4×2×2 (4 leaf fertilizer levels × 2 systems × 2 seasons) factorial arrangement. The results were analyzed using the GLIMMIX PROC of SAS University while means were compared by the T-test at 5%. Foliar fertilizer had a significant (P≤0.05) effect on cv. BRS Paiaguas stem mass under shading while the 3 and 6 L/ha levels produced the lowest (P≤0.05) masses. The forage and root masses were not significantly affected (P≥0.05) by the systems and seasons whereas the dead material mass was not influenced by the seasons. The shading system resulted in (P≤0.05) significantly lower dead material mass for both cultivars and higher (P≤0.05) leaf and stem masses for the cv. BRS Piata. In the rainy season, leaf and stem masses were greater (P≤0.05). Foliar fertilization up to 6 L/ha favored the stem control in cv. BRS Paiaguas under shading. The resulting masses of forage, dead material, and root allow concluding that the cultivars adapted well to the shading and dry season.

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Características Morfogênicas E Estruturais Do Capim-Marandu Sob Irrigação E Adubação

Cited by 3 publications

References 4 publications

Agronomic features of elephant grass (Pennisetum purpureum Schum) cv. Roxo under irrigation

Agronomic features of elephant grass (Pennisetum purpureum Schum) cv. Roxo under irrigation

Agronomic and Bromatological Traits of Brachiaria brizantha cv. Piatã as Affected by Nitrogen Rates and Cutting Heights

Estructura del pasto forrajero con cultivares de Urochloa brizantha bajo sombra

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