Structural traits of elephant grass (<i>Pennisetum purpureum</i>Schum.) genotypes under rotational stocking strategies

Gomide, C.A.M.; Chaves, Carla Silva; Ribeiro, Karina Guimarães; Sollenberger, Lynn E.; Paciullo, D.S.C.; Pereira, Tatiana Pires; Morenz, Mirton Jf

doi:10.2989/10220119.2014.930929

Cited by 13 publications

(22 citation statements)

References 29 publications

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“…The difference obtained in the first cycle is probably due to the better growth conditions, since the difference occurred in the transition of the rainy season to the drought season, contributing to the higher proportion of stems in clone CNPGL 00-1-3, which presents an intermediate size. The same results were observed by Gomide et al (2015) during the rainy season. According to these authors, the higher stem mass of clone CNPGL 00-1-3 contributed to its lower leaf:stem ratio observed in relation to that of BRS Kurumi.…”

Section: Resultssupporting

confidence: 78%

“…Although CNPGL 00-1-3 presented greater height and greater green forage mass, BRS Kurumi presented, in absolute values, the greatest proportion of leaf mass, fraction of higher nutritive value and preferably consumed by grazing animals. Gomide et al (2015) also reported a higher proportion of leaves for BRS Kurumi compared to CNPGL 00-1-3 when these genotypes were evaluated during the rainy season. Fernandes (2011) reported that BRS Kurumi showed a higher dry leaf mass (1,877 kg ha -1 grazing cycle -1 ) than did CNPGL 00-1-3 in the rainy season.…”

Section: Resultsmentioning

confidence: 99%

“…Both events can be attributed to the interruption of the experiment due to the low forage allowance during the month of July. Gomide et al (2015) evaluated the same clones and obtained values of 1.34 and 0.96 for the leaf:stem ratio, and the highest values were observed for the BRS Kurumi clone during the rainy season. Table 4.…”

Section: Resultsmentioning

confidence: 99%

“…The proportion of dead forage mass represented approximately 24% of the dry mass of forage. Gomide et al (2015) reported that the proportions of dead material for both clones were less than 10% of the DM during the rainy season. Fernandes (2011) also evaluated the same clones under grazing during the rainy season and reported lower values than those obtained in the present study, with averages of 434 and 209 kg DM ha -1 cycle -1 for clones CNPGL 00-1-3 and BRS Kurumi, which correspond to an average proportion of 10% of the dry mass of dead material in relation to the total forage mass.…”

Section: Resultsmentioning

confidence: 99%

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Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period

Morenz¹,

Morenz²,

Paciullo³

et al. 2017

SCA

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This study aimed to evaluate the agronomic characteristics and nutritional value of two clones of elephant grass (CNPGL 00-1-3 and BRS Kurumi) operating under rotational stocking in the dry season. A completely randomized design with repeated measures (grazing cycles) and three replicates (paddocks) was used. Clones were managed under rotational stocking with a defoliation interval of 24 days and four days of occupation of paddocks, using Holstein x Gyr heifers with mean body weight of 150 kg. The evaluations were conducted in April/May, May/June, June/July and July/August 2010. Green forage mass was influenced by clone and grazing cycle, with higher mean value observed for CNPGL 03-01-00, which was 17% higher than the value observed for BRS Kurumi, and there was decreased of dry mass of green forage with the advance of grazing cycles. Leaf mass was influenced only by grazing cycle, with gradual reduction from the first to the third cycle. However, in fourth cycle was increase in biomass of leaves, which did not differ from that observed in the second cycle. There was interaction for dry matter production of stem, being observed differences in the first and third cycles for the clones. There was no effect of the factors studied for the production of senescent material. The leaf:stem ratio was influenced by grazing cycles, with interaction of the factors studied. The clone BRS Kurumi kept the leaf:stem ratio stable over the cycles, while clone CNPGL 1-3-00 presented a decrease in leaf:stem ratio from first until to third cycle. The content of crude protein (PB) was not influenced by the factors studied, with average values of 15.3% and 15.8% PB for the CNPGL 00-1-3 and BRS Kurumi clones. Neutral detergent fiber (NDF) and the in vitro dry matter digestibility (IVDMD) were affected only by grazing cycles. The highest values of NDF were observed in the three first grazing cycles, with values of 55.5%, 56.0% and 55.7% from the first to the third grazing cycle, respectively, while in the fourth cycle was obtained the value of 50.5%. There was a decrease in the IVDMD until the third cycle. In the fourth cycle the IVDMD values were similar to the first cycle. The clones did not differ in relation to biomass production, morphological composition and nutritional value, during the dry season. ResumoObjetivou-se avaliar as características agronômicas e o valor nutricional de clones de capim-elefante sob lotação rotacionada. Foram avaliados os clones CNPGL 00-1-3 e BRS Kurumi, distribuídos em delineamento inteiramente casualizado, com medidas repetidas no tempo (ciclos de pastejo) e três repetições (piquetes). Foram utilizadas 16 novilhas Holandês x Gir, com peso corporal médio inicial de 150 kg. Animais reguladores de consumo foram utilizados, quando necessário, para o alcance das metas de manejo. Os clones foram manejados sob lotação rotacionada, com 24 dias de intervalo de desfolha e quatro dias de ocupação dos piquetes. As avaliações foram conduzidas em abril/maio, maio/junho. Junho/julho e lulho/agosto de 2010....

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Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period

Morenz¹,

Morenz²,

Paciullo³

et al. 2017

SCA

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show abstract

“…In Figure 2, we can also note that the reduction in leaves with grazing cycles is more pronounced in the pasture that was managed with a fixed 30-day rest period. This damage to the sward structure was an extension of the rest period during the rainy season and has been found in several tropical grasses such as marandu palisade grass (Trindade et al, 2007), Mombasa grass Alexandrino, 2007;Carnevalli et al, 2006), Tanzania grass (Barbosa et al, 2007), and elephant grass (Voltolini et al, 2010;Sousa et al, 2013;Gomide et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Forage mass and morphological composition of Marandu palisade grass pasture under rest periods

et al. 2016

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An evaluation of productive potential is not the only factor used to determine grazing management efficiency; it is also necessary to know the structural characteristics of the canopy. The objective of this study was to evaluate the effects of two management styles on Marandu palisade grass pastures under rotational stocking with respect to the herbage mass, morphological composition, and structural characteristics of the pasture. The treatments under consideration were a) a fixed rest period of 30 days (RP30) or b) a rest period based on the time necessary for the canopy to reach 95% light interception (LI95). The experimental design was a completely randomized block with two blocks and three replicates within the blocks. Animals were placed in the paddocks when the grass reached the established management criteria, which were maintained for three days to reach 25 cm in stubble height. Shorter grazing intervals (22.8 vs. 30 days), lower pre-grazing heights (35.9 vs. 42.3 cm), and lower forage masses (4,411 vs. 5,290 kg/ha.cycle) were observed in LI95 pastures. The LI95 treatment had a higher leaf percentage (48.3 vs. 41.1) and the lowest percentage of dead forage (19.0 vs. 25.4) in the pre-grazing forage mass of the pasture in relation to that of RP30. Performing pasture management based on RP30 throughout the season is harmful to the pasture structure because it reduces the leaf percentage and increases the stem and senescent material in the available forage. The lower pre-grazing forage mass observed under LI95 management is offset by more grazing cycles within the rainy season.Index terms: Pre-grazing height; Grazing cycle; interception of photosynthetically active radiation; leaf mass. RESUMOA avaliação do potencial produtivo do pasto não é o único fator que pode ser usado para determinar a eficiência de manejo do pastejo, também é necessário considerar as características estruturais do dossel. Neste estudo, objetivou-se avaliar a influência de dois critérios para definição do período de descanso do pasto de capim-marandu sobre a massa de forragem, a composição morfológica e as características estruturais do pasto durante a estação chuvosa. Os períodos de descanso estudados foram: fixo de 30 dias (PD30) e variável, conforme a interceptação de 95% da radiação fotossinteticamente ativa (IL95). O delineamento experimental utilizado foi em blocos inteiramente casualizados, com duas repetições de área e três repetições dentro de bloco. Os animais (vacas mestiças) foram colocados nos piquetes, logo que os pastos atingiam os critérios de manejo estabelecidos e permaneciam dentro dos mesmos durante três dias, de forma a atingir a altura de resíduo de 20-25 cm. Menor intervalo entre pastejo (22,8 vs. 30 dias), menor altura pré-pastejo (35,9 vs. 42,3 cm) e menor massa de forragem verde (4.411 vs. 5.290 kg/ha.ciclo) foram observados no pasto sob IL95. Contudo, o pasto sob IL95 apresentou maior percentual de lâmina foliar (48,3 vs. 41,1) e menor percentual de material morto (19,0 vs. 25,4) na massa de forragem ...

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Radiation use efficiency and canopy structure of contrasting elephant grass varieties grown as monocrops and intercrops with butterfly pea

et al. 2023

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The objective of this study was to evaluate the radiation use efficiency (RUE) and canopy structure of elephant grass varieties (Cenchrus purpureus Schum.) of contrasting statures, under monocropping or intercropped with butterfly pea (Clitoria ternatea L.) in cut-and-carry systems. Two tall varieties (elephant B and IRI-381), and two dwarf ones (Mott and Taiwan A-146 2.37), were evaluated as monocrops or binary intercrops with the legume in a 2-year trial with eight harvests. Greater annual leaf biomass accumulation was observed in the monocrops of the tall variety elephant B (7.76 t/ha per year) and dwarf Mott (8.08 t/ha per year). Greater herbage bulk density (59 kg/ha per cm) and leaf area index (3.83) were recorded in canopies of dwarf Mott than in those composed of IRI-381 (37 kg/ha per cm and 3.48, respectively). In the first year, dwarf varieties Mott and Taiwan A-146 2.37 showed less RUE (0.89 and 0.84 g dry matter (DM)/MJ, respectively) than the elephant B (1.46 g DM/MJ). Higher non-fibre carbohydrate (NFC) contents were found in dwarf Mott under monocrop (180 g/kg) and in the intercrop systems. Tall varieties elephant B and IRI-381 showed greater efficiency in intercepting the radiation to accumulate herbage via stem accumulation. Dwarf Mott variety exhibited short stems and great leaf biomass accumulation that favoured denser canopies with higher content of NFCs in vegetal tissue. Planting butterfly pea into rows of elephant grass varieties can be adopted with no significant losses in RUE caused by light extinction, regardless of the grass stature.

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Structural traits of elephant grass (Pennisetum purpureumSchum.) genotypes under rotational stocking strategies

Cited by 13 publications

References 29 publications

Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period

Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period

Forage mass and morphological composition of Marandu palisade grass pasture under rest periods

Radiation use efficiency and canopy structure of contrasting elephant grass varieties grown as monocrops and intercrops with butterfly pea

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