Tiller size/density compensation in grazed Tifton 85 bermudagrass swards

Sbrissia, André Fischer; Silva, Sila Carneiro da; Matthew, C.; Carvalho, Carlos Augusto Brandão de; Carnevalli, Roberta Aparecida; Pinto, Luiz Felipe de Moura; Fagundes, Jaílson Lara; Pedreira, Carlos Guilherme Silveira

doi:10.1590/s0100-204x2003001200013

Cited by 50 publications

(73 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This trend of pastures kept under lower residual leaf area indices to show lower values for TPD was also verified by other authors studying cultivars of Cynodon and Panicum (Carvalho et al, 2000;Sbrissia et al, 2003;Cutrim Junior, 2007). Such fact can be explained as being a response to the size/population density compensation mechanism of tillers existing in communities of superior plants Sbrissia et al, 2003).…”

Section: Resultssupporting

confidence: 76%

“…(Fagundes et al, 1999;Sbrissia et al, 2003). However, no reference of LAI for Tifton 85 pastures managed under rotational grazing was found.…”

Section: Methodsmentioning

confidence: 99%

“…For this grazing system to succeed, it is necessary that some prerequisites, such as the ideal moment for interruption of pasture regrowth, be well defined (Da Silva & Nascimento Júnior, 2007). Another important aspect is the right moment to stop grazing, so as to ensure a minimum residual leaf area, which, according to Ward & Blaser (1961), is capable of promoting growth of plants until the following defoliation, which should also be stipulated. Parsons et al (1988) observed that 95% light interception (LI) by the forage sward can be utilized satisfactorily for the interruption of pasture regrowth.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural characteristics and forage mass of Tifton 85 pastures managed under three post-grazing residual leaf areas

et al. 2013

View full text Add to dashboard Cite

-The experiment was carried out on Cynodon spp cv. Tifton 85 pastures grazed by sheep under rotational stocking, with the objective of evaluating the structural characteristics as well as the forage mass of the pastures subjected to three grazing intensities in successive cycles. Treatments were composed of three residual leaf area indices (rLAI; 2.4; 1.6 and 0.8), allocated in completely randomized blocks with seven replications, totaling 21 experimental units. Tiller population density, pasture height, leaf area index, forage morphological composition and pasture forage mass were evaluated. The rLAI modified the tiller population density, which increased linearly with decrease in the rLAI of the pastures. Dry masses of leaf blade, stem and dead material were inferior when the rLAI imposed were lower, which resulted in differentiated forage production among the treatments. Tifton 85 pastures grazed by sheep in rotational stocking under tropical conditions with different rLAI show a modified sward structure over successive grazing cycles, mainly by alteration in the height and LAI of the plants at pre-grazing and by light interception post-grazing, which change the tiller population density. The residual leaf area index of 1.6 is the most suitable for pasture management for being equivalent to the heights of entrance and exit of animals on and from paddocks of 33 and 19 cm, respectively, which avoid great accumulation of dead material and excessive stem elongation, in addition to ensuring tillering in the sward.

show abstract

Section: Resultssupporting

confidence: 76%

“…(Fagundes et al, 1999;Sbrissia et al, 2003). However, no reference of LAI for Tifton 85 pastures managed under rotational grazing was found.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural characteristics and forage mass of Tifton 85 pastures managed under three post-grazing residual leaf areas

et al. 2013

View full text Add to dashboard Cite

show abstract

“…This process occurs through a compensation mechanism of size/ population density of tillers (Matthew et al 1995;Sbrissia et al, 2001Sbrissia et al, , 2003, in which tillers die basically because of competition for light in the canopy. However, when the forage is harvested at 95% of light interception, the intense competition for light is avoided.…”

Section: Resultsmentioning

confidence: 99%

Tillering dynamics in pastures of guinea grass subjected to grazing severities under intermittent stocking

Montagner¹,

Júnior²,

Vilela³

et al. 2012

R. Bras. Zootec.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Pesquisas têm revelado a capacidade de ajuste das plantas forrageiras sob diferentes condições de manejo, que é chamada de plasticidade fenotípica (Lemaire & Chapman, 1996). Sob pastejo intenso, se observam pequenos, mas numerosos perfilhos, enquanto poucos e grandes perfilhos são encontrados sob pastejo leniente (Carvalho et al, 2000;Sbrissia et al, 2003).…”

Section: Resultsunclassified

Características estruturais e produção de forragem em pastos de capim-mombaça submetidos a períodos de descanso

Gomide

Alexandrino

2007

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -Este trabalho teve como objetivo avaliar as características estruturais, morfológicas e produtivas em pastos de capim-mombaça sob lotação rotacionada com três períodos de descanso, definidos conforme o número de novas folhas expandidas por perfilho: 2,5, 3,5 e 4,5 folhas. O delineamento experimental foi inteiramente casualizado com seis repetições, num total de 18 piquetes. Foram avaliadas as características: biomassa total, taxa de crescimento cultural, altura do dossel, relação folha/colmo, índice de área foliar, interceptação da radiação, taxa de aparecimento e alongamento foliares, taxa de alongamento do colmo, densidade de perfilhos e coeficiente de extinção. As maiores taxas de acúmulo de forragem foram observadas em piquetes submetidos a período de descanso correspondente ao aparecimento de 2,5 folhas por perfilho. A menor biomassa de forragem por ciclo de pastejo deste tratamento foi compensada pelo maior número de ciclos observados. O índice de área foliar foi proporcional ao período de descanso, mas a interceptação da radiação ultrapassou o valor de 95% ao final do período de descanso em todos os tratamentos. O prolongamento do período de descanso resultou em comprometimento da estrutura do pasto, sinalizado por baixos valores da relação folha/colmo. O período de descanso em capim-mombaça não deve ultrapassar o tempo necessário para o aparecimento de três folhas por perfilho.Termos para indexação: acúmulo de forragem, índice de área foliar, interceptação da radiação, morfogênese, relação folha/colmo. Structural characteristics and forage production of Panicum maximum cv. Mombaça pasture according to rest periodsAbstract -The objective of this work was to evaluate structural, morphological and productive traits of Panicum Maximum cv. Mombaça pasture under rotational stocking. Three rest periods defined in terms of 2.5, 3.5 and 4.5 leaves per tiller were studied. Experimental design was completely randomized with six replicates (paddocks) per treatment. Experimental variables assessed were: forage biomass, biomass accumulation rate, plant height, leaf-stem ratio, leaf area index, interception of photosynthetically active radiation (PAR), leaf appearance and elongation rates, stem elongation rate, tiller density population and extinction coeficient. Forage biomass per grazing cycle, leaf area index and plant height varied directly while tiller population, crop growth rate and leafstem ratio varied inversely with length of the rest period. Though leaf area index and forage biomass related directly with the duration of the rest period, interception of PAR exceeded the value of 95% by the end of rest period, regardless of experimental treatment. Rest period prolongation jeopardizes the pasture structure, which could be verified by low values of leaf/stem ratio. Rest period in Panicum maximum cv. Mombaça should not be longer than the time for the appearance of three leaves per tiller.

show abstract

Tiller size/density compensation in grazed Tifton 85 bermudagrass swards

Cited by 50 publications

References 19 publications

Structural characteristics and forage mass of Tifton 85 pastures managed under three post-grazing residual leaf areas

Structural characteristics and forage mass of Tifton 85 pastures managed under three post-grazing residual leaf areas

Tillering dynamics in pastures of guinea grass subjected to grazing severities under intermittent stocking

Características estruturais e produção de forragem em pastos de capim-mombaça submetidos a períodos de descanso

Contact Info

Product

Resources

About