Efeito da amonização com uréia sobre os parâmetros de qualidade do feno do capim-Annoni 2 (Eragrostis plana Nees)

Alfaya, Hero; Suñe, Luciane; Siqueira, Cleia Maria Gisler; Silva, Derli João Siqueira da; Silva, João Baptista da; Pederzolli, Everton Madeira; Lüeder, Werner Erwin

doi:10.1590/s1516-35982002000400006

Cited by 9 publications

(8 citation statements)

References 9 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The low crude protein (6.9%) was registered by Alfaya et al (2002) in hay of this grass, indicating 1.1% of N content. According to Medeiros & Focht (2007), these characteristics can explain, in part, the adaptive advantage of tough lovegrass to colonize openings in the grassland vegetation in degraded soils, with high abundance of species with high N-level, like P. notatum Flüggé.…”

Section: Resultsmentioning

confidence: 80%

“…Alfaya et al (2002) recorded 6.9% of crude protein in hay of this species, which is low for the minimal amount required for ruminants (7%). Tough lovegrass represents a great problem to the farmers, as the animal rejection favors the accumulation of great matter quantity (Medeiros & Focht, 2007).…”

Section: Introductionmentioning

confidence: 72%

“…This behavior suggests that the precocious mechanical control of tough lovegrass, when the plants are young, can minimize the plant size and reduce root and shoot yield. For the areas infested by tough lovegrass, Alfaya et al (2002) suggested the cutting before the seed set as an alternative to slowly reduce the soil seed bank. The control techniques must deplete the seed bank, avoid the reposition of new propagules and eliminate the new plants (Reis & Coelho, 2000), as well as with crop rotation and herbicide application (Moraes et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Growth and regrowth of tough lovegrass (Eragrostis plana Nees)

et al. 2012

View full text Add to dashboard Cite

-This study evaluated the morphological development of two populations of tough lovegrass during 120 days of continuous growth (Experiment I), and the regrowth of one population under the combination of cutting height (5 cm and 10 cm) and phenological stage at the first cutting (vegetative and beginning of flowering; Experiment II). In Experiment I, plants were harvested at 30, 60, 90 and 120 days of growth; in Experiment II, three cuttings were carried out at every 30 days, and the plants were harvested four weeks after the previous one. In Experiment I, the populations did not differ for morphological development, showing a linear increase in height and tiller number, and a quadratic trend for root and shoot dry matter (DM).At 120 days of growth, plants presented 10 basal tillers and 80 leaves, strongly compressed at the base and no sign of senescence.In Experiment II, there was no significant cutting height × phenological stage interaction, but cuttings at 5 cm reduced plant size and yield. Cuttings started at the vegetative stage decreased the root (3.06 g DM/plant) and stubble dry matter (1.17 g DM/plant), compared with 6.84 g and 3.99 g DM/plant, respectively, with cuttings started at the flowering stage. Tough lovegrass shows basal architecture, basal bud renovation, leaves densely compressed in the tiller base, high belowground allocation, and elongation of internodes only in reproductive stage. Mechanical control is an alternative method to minimize its growth, especially if it is carried out early in the growing season and at low cutting height.

show abstract

Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Growth and regrowth of tough lovegrass (Eragrostis plana Nees)

et al. 2012

View full text Add to dashboard Cite

show abstract

“…At the vegetative stage, probably because the time between the applications of N and the harvest was the shortest, there was no difference 5 among doses. In the tough lovegrass that was not fertilized with N, Alfaya et al (2002) The allelopathic effect of the aqueous extracts on lettuce was visually observed (Figure 3) and quantified according to the germinability and the GSI (Table 2), in accordance with other authors who evaluated the allelopathic potential of the tough lovegrass (Ferreira et al, 2008;Favaretto et al, 2011). The allelopathic symptoms, in a greater or a lesser degree and depending of the extract, included necrosis, shortening and winding of the root apex (Figure 3), which is commonly reported in bioassays of this type (Souza Filho et al, 1997).…”

Section: Resultsmentioning

confidence: 99%

Allelopathy and Allelochemicals of Eragrostis plana (Poaceae) and its Relation with Phenology and Nitrogen Fertilization

et al. 2017

View full text Add to dashboard Cite

-This study was conducted in order to verify if the phenological stage and the nitrogen fertilization interfere in the allelopathic activity and in the concentration of potentially allelopathic phenolic compounds of tough lovegrass (Eragrostis plana). The assay consisted of a bifactor 3 (0.100 and 200 kg N ha -1 ) x 2 (harvested in vegetative and reproductive stages), in a split plot design. The N doses constituted the main plot and the phenological stage during the harvest the subplots, resulting in six treatments. The tough lovegrass plants derived from each of the treatments were subjected to allelopathy bioassays, in which aqueous extracts of the aerial parts were applied to lettuce cypselae (Lactuca sativa) and to phytochemicals tests when ethanolic extracts were used, with subsequent partition with ethyl acetate, followed by a high-performance liquid chromatography analysis. There was nitrogen x phenological stage interaction on biological and chemical attributes. The allelopathic extracts were, in descending order of inhibition of germination, those from plants harvested at the vegetative stage and fertilized with 100 kg N and at the flowering stage with 200 kg N, which showed the highest catechin concentrations. The caffeic, ferulic, p-coumaric and vanillic acids were in a higher concentration in flowered and fertilized plants with 0 or 200 kg N. The management of the nitrogen fertilization and the harvesting age influence the allelopathic activity and the phytochemical composition of tough lovegrass.Keywords: germinability, phenolic acids, catechin, epicatechin. RESUMO -Este estudo foi realizado com o objetivo de verificar se a fenologia e a adubação nitrogenada interferem na atividade alelopática e na composição fenólica do capim-annoni (Eragrostis plana

show abstract

“…Avaliações da pastagem nativa com dominância de capim-annoni mostraram baixos teores de proteína bruta e fibra em detergente neutro (5,6; 71,6% e 4,1; 69,9%) durante a estação quente, que foram verificados quando as disponibilidades de forragem foram superiores a 5 ton/ MS/ ha (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) . Por outro lado, Alfaya et al (18) , avaliando feno de capim-anonni, observaram diminuição dos teores proteicos médios aproximados (7,8 a 5,3%), durante a primavera e verão referentes a cinco épocas de corte (30 a 150 dias). Assim, para a obtenção de maiores teores de proteína bruta da invasora capim-anonni sob pastejo, verifica-se quando as plântulas estão em desenvolvimento inicial na primavera e com disponibilidades de massa de forragem variando entre 2000 a 2500 kg de MS/ha.…”

Section: Resultsunclassified

VALOR NUTRITIVO DE UMA PASTAGEM NATIVA DOMINADA POR Eragrostis plana Nees E SUA RELAÇÃO COM O PERFIL METABÓLICO DE VACAS PRIMÍPARAS SUPLEMENTADAS DA GESTAÇÃO AO PÓS-PARTO

et al. 2016

View full text Add to dashboard Cite

ResumoObjetivou-se com este trabalho estimar a qualidade da massa de forragem de uma pastagem nativa com 70% de cobertura de capim-annoni (Eragrostis plana Nees) sob pastejo contínuo de vacas primíparas. As características químicas da forragem dos componentes folha e colmo de capim-annoni e espécies nativas avaliadas foram: digestibilidade in vitro da matéria orgânica (DIVMO), proteína bruta (PB) e fibra em detergente neutro (FDN). O perfil metabólico proteico e mineral no sangue das vacas foi relacionado com os suplementos sal comum, Fosbovi pronto®, Foscromo seca® e Fosbovi reprodução®. Verificaram-se maiores teores de PB na folha e colmo de capim-annoni no inverno (9,4% e 6,7) e primavera (8,9% e 6,6), respectivamente. As variáveis metabólicas protéicas no sangue não diferiram entre suplementos (P>0,05), mas os níveis de albumina (34,5 a 25,3 g/L) e ureia (36,2 a 30,1 mg/dL) diminuíram do inverno para verão. Houve deficiência dos teores médios do mineral fósforo para vacas suplementadas com Foscromo seca® (3,9), Fosbovi pronto® (3,3) e sal comum (2,2) na primavera e sal comum no verão (2,9 mg/dL). Vacas primíparas manejadas em pastagem nativa com predominância de 70% de cobertura de capim-annoni exigem suplementação do mineral fósforo com Fosbovi reprodução® nas estações da primavera e verão. Palavras-chave: Digestibilidade da matéria orgânica; espécies nativas; fibra em detergente neutro; folha; proteína bruta. AbstractThe objective of this research was to evaluate the quality of the forage mass of a native pasture covered by 70% of Eragrostis plana Nees (South African lovegrass) under continuous grazing of primiparous cows. The following chemical characteristics of forage components leaves and stems of South African lovegrass and native species were evaluated: organic matter in vitro digestibility (OMIVD), crude protein (CP), and neutral detergent fiber (NDF). The protein and mineral metabolic profile in blood was associated with the supplements common salt, mineral salt, protein salt and reproduction salt. There was higher crude protein content in leaves and stems of South African lovegrass in winter (9.4% and 6.7) and

show abstract

Efeito da amonização com uréia sobre os parâmetros de qualidade do feno do capim-Annoni 2 (Eragrostis plana Nees)

Cited by 9 publications

References 9 publications

Growth and regrowth of tough lovegrass (Eragrostis plana Nees)

Growth and regrowth of tough lovegrass (Eragrostis plana Nees)

Allelopathy and Allelochemicals of Eragrostis plana (Poaceae) and its Relation with Phenology and Nitrogen Fertilization

VALOR NUTRITIVO DE UMA PASTAGEM NATIVA DOMINADA POR Eragrostis plana Nees E SUA RELAÇÃO COM O PERFIL METABÓLICO DE VACAS PRIMÍPARAS SUPLEMENTADAS DA GESTAÇÃO AO PÓS-PARTO

Contact Info

Product

Resources

About