Nitrogen Fertilization and Cutting Management of Sudangrasses and Millets<sup>1</sup>

Broyles, K. R.; Fribourg, Henry A.

doi:10.2134/agronj1959.00021962005100050009x

Cited by 21 publications

(21 citation statements)

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“…O efeito positivo da adubação nitrogenada sobre o rendimento e qualidade da forragem de sorgo é unanimemente relatado por diversos pesquisadores, assim Broyles & Fribourg (1959), Hart & Burton (1965) e Jung et al (1964 relatam aumentos na produção e qualidade da forragem de sorgos até 280 kg de N/ha. Medeiros et al (1979) estudando o rendimento e a qualidade da cultivar sorgo sordan (Sorghum bicolor x Sorghum sudanense) submetido a diferentes níveis de adubação nitrogenada observaram variações na massa seca de 9,1 a 16,5 t/ha e no teor de PB de 10 a 14%, em resposta às doses de N (0; 100; 200 e 300 kg N/ha).…”

Section: (Recebido Em 20 De Novembro De 2006 E Aprovado Em 16 De Julhunclassified

Resposta do híbrido de sorgo-sudão à adubação nitrogenada e potássica: composição química e digestibilidade in vitro da matéria orgânica

Simili

Reis

Furlan³

et al. 2008

Ciênc. agrotec.

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RESUMOA pesquisa foi instalada no Setor de Forragicultura da FCAV/UNESP-Jaboticabal, objetivando avaliar a composição química e a digestibilidade in vitro da matéria orgânica (DIVMO) do híbrido de Sorgo-sudão cv. AG 2501C, no outono e inverno. O manejo da pastagem foi conduzido simulando o sistema de lotação intermitente. O experimento foi desenvolvido de março a setembro de 2002. A forrageira foi submetida a nove tratamentos: três níveis de nitrogênio (100, 200 e 300 kg de N/ha) e três níveis de potássio (0, 80 e 160 kg de K 2 O/ha), em delineamento experimental em blocos casualizados e parcelas subdivididas. A adubação nitrogenada e potássica não foram significativas para a DIVMO. O nitrogênio influenciou a proteína bruta (PB) com valores de 15,1; 16,4 e 15,7 %, a fibra em detergente neutro (FDN) com valores de 65,3; 65,8 e 64,5% e fibra em detergente ácido (FDA) com 35,5; 37,8 e 39,6% para 100; 200 e 300 kg N/ha. O potássio aumentou significativamente a lignina das plantas. O melhor nível obtido foi 100 kg/ha de nitrogênio, sem potássio.Termos para indexação: Gramíneas anuais de verão, proteína bruta, Sorghum bicolor x Sorghum sudanense. ABSTRACTThe research was carried out in the Forage Section of FCAV/UNESP-Jaboticabal, to evaluate the chemical composition and the in vitro digestibility of organic matter (IVDOM) of the hybrid sorghum cv. AG 2501C (Sorghum bicolor x Sorghum sudanense) during autumn/winter. The management of pasture was conducted by a simulation of a rotational stocking. The experiment was developed from March to September 2002. The forage was submitted to nine treatments: three nitrogen levels (100, 220 and 300 kg/ ha) and three potassium levels (0, 80 and 160 kg/ha) in a randomized blocks design and split plot. No effect of nitrogen and potassium fertilization on IVDOM was found. Nitrogen had influence on crude protein with values of 15.1, 16.4 and 15.7% of CP and 65.3, 65.8 and 64.5% of neutral detergent fiber (NDF) and 35.5, 37.8, 39.6% of acid detergent fiber (ADF), for 100, 200 and 300 kg N/ha. The potassium fertilization increased the lignin of plant. We concluded that, the best level was 100 kg/ha of nitrogen fertilization, without potassium. Entre os macronutrientes, o nitrogênio e o potássio possuem papel fundamental para a nutrição das plantas; o nitrogênio, por ser constituinte essencial das proteínas e interferir diretamente no processo fotossintético, pela sua participação na molécula de clorofila, e o potássio, por ser o cátion em maior concentração nas plantas, sendo um nutriente com relevantes funções fisiológicas e metabólicas como ativação de enzimas, fotossíntese, translocação de assimilados e, também absorção de nitrogênio e síntese protéica, tornando-se, portanto, limitante em sistema de utilização intensiva de solo. Index terms:

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Section: (Recebido Em 20 De Novembro De 2006 E Aprovado Em 16 De Julhunclassified

Resposta do híbrido de sorgo-sudão à adubação nitrogenada e potássica: composição química e digestibilidade in vitro da matéria orgânica

Simili

Reis

Furlan³

et al. 2008

Ciênc. agrotec.

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“…In general, DM yields are higher with more frequent harvests and shorter stubble heights. Broyles and Fribourg (1959) reported that regrowth of millet was more rapid from 15.24 and 20.32 cm stubble heights than from 7.62 and 10.16 cm stubble heights. In their work, increased defoliation tended to decrease tiller production.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrogen Rate and Stubble Height on Dry Matter Yield, Crude Protein Content and Crude Protein Yield of a Sorghum–Sudangrass Hybrid[Sorghum bicolor (L.) Moench × Sorghum sudanense (Piper) Stapf.] in the Three‐Cutting System

İptaş¹,

Brohi²

2003

J Agronomy Crop Science

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In this study, the effects of nitrogen (N) rate (60, 120, 180 and 240 kg N ha−1 applied in three equal dressings at seeding and after the first and second cuttings) and stubble height (7, 14 and 21 cm) on the dry matter (DM) yield, crude protein (CP) content, and CP yield of a sorghum–sudangrass hybrid [Sorghum bicolor (L.) Moench × Sorghum sudanense (Piper) Stapf., cv. Pioneer 988] in the three‐cut system was investigated. The N rate had no significant effect in the first and third cuttings, but in the second cutting DM yields increased significantly with increase in N rate. The highest yield of 9.1 t ha−1 was obtained with 80 kg N ha−1 for the average of 2 years at the second cutting, but no significant difference was found among the 40, 60 and 80 kg N ha−1 rates. CP content and yield were not significantly affected by N rate at the first and third cuttings, but CP content and yield were significantly affected by application of N at the second cutting. Stubble height had a significant effect on CP content at the third cutting. However, it had no significant effect on CP content at the first and second cuttings. Stubble height had a significant effect on the CP yield at the first cutting, but no significant effect on CP yield at the second and third cuttings.

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“…Results of experiments in which sudangrass and pearl millet were compared show mixed results. Broyles and Fribourg (1959) found that Gahi‐1 pearl millet out‐yielded sudangrass. Clark et al (1965) reported similar yields of dry matter (DM) produced by sudangrass, a sorghum‐sudangrass hybrid, and pearl millet in Maryland, as well as similar amounts of milk produced by cows fed these three grasses.…”

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No‐Till Sequential Cropping of Summer and Fall Annual Forage Species Compared with Grassland

Basweti¹,

Turk

Rayburn

et al. 2009

Agronomy Journal

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Summer (SAS) and fall annual species (FAS) can supplement animal forage requirements during times of slow growth of cool-season perennials. A 2-yr experiment was conducted in a perennial grassland (G) at the Reedsville Experimental Farm of West Virginia University to determine herbage accumulation (HA) and quality of two summer and two fall crops (in factorial combination) grown on the same land. Th e summer crops were sudangrass [Sorghum bicolor (L.) Moench] or pearl millet [Pennisetum glaucum (L.) R. Br.], and the fall crops were triticale (×Triticosecale spp.) or a mixture of annual ryegrass (Lolium multifl orum Lam.) and turnip (Brassica rapa L.). Two methods, burning and glyphosate application, were used to control existing vegetation before seeding annual forages. Th ree levels of N (0, 50, and 100 kg ha −1 ) were applied to each sequence of crops on two occasions for a total of 0, 100, and 200 kg ha −1 yr −1 . On a 12-mo basis, G out-produced (at 0 and 100 kg N ha −1 ) or equaled (at 200 kg N ha −1 ) all combinations of SAS and FAS. Sudangrass produced the most herbage mass in summer and was of lower quality than pearl millet and G. Species established aft er glyphosate and receiving high N application produced more herbage mass than those established aft er burning or with lower rates of N. Pearl millet seeded aft er burning failed to establish. Grassland (2543 kg ha −1 ) and the mixture of annual ryegrass and turnip (2608 kg ha −1 ) out-produced triticale (1778 kg ha −1 ) in fall.

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Nitrogen Fertilization and Cutting Management of Sudangrasses and Millets¹

Cited by 21 publications

References 9 publications

Resposta do híbrido de sorgo-sudão à adubação nitrogenada e potássica: composição química e digestibilidade in vitro da matéria orgânica

Resposta do híbrido de sorgo-sudão à adubação nitrogenada e potássica: composição química e digestibilidade in vitro da matéria orgânica

Effect of Nitrogen Rate and Stubble Height on Dry Matter Yield, Crude Protein Content and Crude Protein Yield of a Sorghum–Sudangrass Hybrid[Sorghum bicolor (L.) Moench × Sorghum sudanense (Piper) Stapf.] in the Three‐Cutting System

No‐Till Sequential Cropping of Summer and Fall Annual Forage Species Compared with Grassland

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Nitrogen Fertilization and Cutting Management of Sudangrasses and Millets1

Cited by 21 publications

References 9 publications

Resposta do híbrido de sorgo-sudão à adubação nitrogenada e potássica: composição química e digestibilidade in vitro da matéria orgânica

Resposta do híbrido de sorgo-sudão à adubação nitrogenada e potássica: composição química e digestibilidade in vitro da matéria orgânica

Effect of Nitrogen Rate and Stubble Height on Dry Matter Yield, Crude Protein Content and Crude Protein Yield of a Sorghum–Sudangrass Hybrid[Sorghum bicolor (L.) Moench × Sorghum sudanense (Piper) Stapf.] in the Three‐Cutting System

No‐Till Sequential Cropping of Summer and Fall Annual Forage Species Compared with Grassland

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Nitrogen Fertilization and Cutting Management of Sudangrasses and Millets¹