2013
DOI: 10.1590/s1516-35982013000400002
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Structural characteristics and forage mass of Tifton 85 pastures managed under three post-grazing residual leaf areas

Abstract: -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 … Show more

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Cited by 17 publications
(19 citation statements)
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“…Measurement of light interception (LI) by the sward in order to determine the best time to start grazing has been used in experimental conditions in tropical regions, mainly in Brazil, because several scientific results showed a correlation between LI with forage production and nutritive value (CUNHA et al, 2010;DIFANTE et al, 2010;GALZERANO et al, 2013;SOUSA et al, 2013;SILVA et al, 2013). The best point to begin animal grazing is considered to be when the sward is achieving an average of 95% light interception.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Measurement of light interception (LI) by the sward in order to determine the best time to start grazing has been used in experimental conditions in tropical regions, mainly in Brazil, because several scientific results showed a correlation between LI with forage production and nutritive value (CUNHA et al, 2010;DIFANTE et al, 2010;GALZERANO et al, 2013;SOUSA et al, 2013;SILVA et al, 2013). The best point to begin animal grazing is considered to be when the sward is achieving an average of 95% light interception.…”
Section: Introductionmentioning
confidence: 99%
“…The best point to begin animal grazing is considered to be when the sward is achieving an average of 95% light interception. Regarding the interruption of animal grazing, the residual leaf area index (rLAI) technique was and is being used in research in different forages and conditions in Brazil (CUTRIM JÚNIOR, 2010SILVA et al, 2013;GALZERANO et al, 2013), though less commonly than other techniques such as measurement of postgrazing heights, herbage allowance, or fixed days.…”
Section: Introductionmentioning
confidence: 99%
“…Estimates of total dry matter (TDM) in kg DM ha -1 were obtained by collecting two forage samples (1 m 2 ) per paddock, according to the mass evaluation protocol, at points representative of the average sward height (Silva et al, 2013). Because of the limited areas of the paddocks, two representative points were sampled per paddock to avoid damaging the pasture structure through successive collections.…”
Section: Forage Production and Qualitymentioning
confidence: 99%
“…Watson (1947) introduziu na ciência da pastagem o conceito de índice de área foliar (IAF) como sendo a área de uma das faces das folhas, dividida pela área de solo que ocupam, no entanto, os primeiros estudos relacionando IAF com plantas forrageiras foram realizados por Brougham (1958) que constatou que o IAF para máxima interceptação da radiação depende de vários fatores como espécie forrageira, elevação do sol, orientação das folhas, se planófilas, eretófilas assim como o formato. O IAF também tem sido utilizado com bastante frequência como estratégia para interrupção do pastejo em experimentos em lotação intermitente (LIMA SANTOS, 2009;CUTRIM JUNIOR et al, 2010;SILVA et al, 2013). De acordo com Lemaire e Chapman (1996), o arranjo espacial do dossel é função das características morfogênicas e estruturais resultantes da estratégia de pastejo adotada e dentre as características morfogênicas que mais afetam a características estruturais do dossel, destacase a taxa de aparecimento de folhas.…”
Section: Introductionunclassified