Brachiaria physiological parameters in agroforestry systems

Santos, Maurinho Luiz dos; Ferreira, Evander Alves; Valadão, Daniel Dias; Oliveira, Fabiana Lopes Ramos de; Machado, Vitor Diniz; Silveira, Rodrigo Richard da; Souza, Matheus de Freitas

doi:10.1590/0103-8478cr20160150

Cited by 12 publications

(10 citation statements)

References 9 publications

(9 reference statements)

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“…Silvopastoral systems have been proposed as a means of intensifying beef production systems by associating trees, planted pastures, and animals (Paciullo et al, 2017). Tropical forage grasses, however, are generally more efficient and better adapted to full sun (Santos et al, 2017) and the impact of pasture shading in an SPS needs to be quantified and rationalized.…”

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Shading Effects on Marandu Palisadegrass in a Silvopastoral System: Plant Morphological and Physiological Responses

et al. 2019

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The understanding of plant morphological and physiological responses to shading can contribute to developing sustainable silvopastoral systems (SPS). Our objective was to evaluate the shading effect on herbage accumulation (HA), plant‐part composition, physiology, and canopy structural characteristics of Marandu palisadegrass {Urochloa brizantha (Hochst. ex A. Rich.) R.D. Webster [syn. Brachiaria brizantha (Hochst. ex A. Rich.) Stapf]} under intermittent defoliation in a SPS with Eucalyptus urograndis (hybrid of Eucalyptus grandis W. Hill ex Maiden and Eucalyptus urophylla S.T. Blake) in Sinop, Mato Grosso, Brazil. The experimental design was a randomized complete block arranged under a strip‐split‐plot, where the plots were allocated to four distances from the Eucalyptus grove (3, 6, 10, and 15‐m) in the SPS, on both faces (north and south), with four replications. The evaluations were done during two summer rainy seasons (RS1 and RS2) and one dry season (DS). The herbage accumulation (HA) in RS1 (4290 kg DM ha–1) was 51% greater than in RS2. The greatest canopy height, light interception, and leaf area index (LAI) values were measured during RS1 (25 cm, 91%, and 3.5 cm2 cm–2, respectively). Leaf photosynthesis rate was less at the 3‐m distance (12.5 μmol CO2 m–2 s–1) than at other distances (17.3 μmol CO2 m–2 s–1). We conclude that Marandu palisadegrass has the ability to physiologically adapt to shaded environments, although the dynamics along the whole tree growing cycle needs to be considered so that grass productivity can be sustained in the long‐term. Core Ideas Longer shading impacted canopy structure and forage accumulation at 3‐m distance. Physiological responses shows reduced light effects on the forage growth pattern. Morphologic composition and sward characteristics were only affected at 3‐m distance. Leaf photosynthesis rate was lesser close to the grove. Silvopastoral systems is an option for livestock production in the Brazilian Amazon.

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Shading Effects on Marandu Palisadegrass in a Silvopastoral System: Plant Morphological and Physiological Responses

et al. 2019

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“…As espécies de brachiaria em diferentes arranjos de sistema agrossilvipastoril prejudicou o desenvolvimento do eucalipto em fileiras com milho para todas as variáveis ecofisiológicas estudadas por Santos et al (2017). No estudo, a espécie B. decumbens em competição com as mudas de P. dubium apresentou os maiores incrementos em MSPA, MSR e MST, se diferenciando estaticamente apenas da B. pilosa nas variáveis mencionadas e da B. brizantha para a MSR e MST (Tabela 4).…”

Section: Resultsunclassified

CRESCIMENTO DE MUDAS DE Peltophorum dubium (Spreng.) Taub. SOB INTERFERÊNCIA DE PLANTAS ESPONTÂNEAS E FORRAGEIRAS

Menezes

Santos

Massad

et al. 2019

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O objetivo do trabalho foi avaliar a interferência de plantas espontâneas e forrageiras no crescimento inicial de mudas de Peltophorum dubium (Spreng.) Taub. As mudas foram produzidas em tubetes e transplantadas para os vasos aos 150 dias organizadas em delineamento experimental de blocos ao acaso, com quatro repetições e 13 tratamentos, sendo o desenvolvimento isolado ou em competição da canafístula com as seguintes espécies: Brachiaria decumbens, Brachiaria brizantha, Urochloa brizantha, Panicum maximum, Bidens pilosa e Cenchrus echinatus L., além da testemunha representada pela canafístula isolada. Cada vaso compôs uma parcela experimental, totalizando 52 vasos. Aos 60 dias de convivência foram mensurados a altura da parte aérea e diâmetro do coleto e quantificada a taxa de crescimento em altura (TCA), massa seca da parte aérea (MSPA), da raiz (MSR) e total (MST). A TCA da canafístula em cultivo isolado e em competição com P. maximum, C. echinatus, B. pilosa, U. brizantha e B. brizantha não apresentou diferença significativa. No plantio consorciado com B. brizantha e B. pilosa as mudas de canafístula obtiveram o maior incremento de MSPA e MST, semelhante à testemunha. Os menores incrementos em MSPA e MST foram obtidos na consorciação com P. maximum, B. decumbens, U. brizantha e C. echinatus. A espécie B. decumbens no plantio em competição com a canafístula apresentou maior produção de MSPA, MSR e MST, menor TCA e baixo acúmulo de MSPA e MST para as mudas da espécie florestal. Espécies espontâneas e forrageiras influenciam o crescimento inicial das mudas de P. dubium.

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“…Our results showed that the sampling point near the double rows of eucalyptus contributed to variations in the physiological parameters of forage grass in relation to the alley (Figure 3). Santos et al (2017) also found that shading contributed to the reduction in E and Gs for soybean plants within an agrosilvopastoral system, identifying that lower spacing from the eucalyptus affected the physiological parameters. The authors highlighted that reduction in light intensity and the high density of forage plants in addition to the greater proximity to eucalyptus trees could limit the photosynthetic rate, especially for C4 plants.…”

Section: Physiological Parameters Of Marandu Palisadegrass Within the Silvopastoral Systemmentioning

confidence: 85%

Sampling representativeness of soil carbon and physiological parameters of marandu palisadegrass in a tropical silvopastoral system

Oliveira

Azevedo

Ribeiro

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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The sampling methods for soil and plant evaluation in integrated production systems need to be refined for their use in experiments. This study purposed a sampling representativeness model to evaluate soil carbon and physiological parameters of marandu palisadegrass intercropped with double rows of eucalyptus in a silvopastoral system in southeastern Brazil. Four transects were delimited within the silvopastoral system and the soil was sampled at 0-5, 5-10, and 10-20 cm depths to evaluate two parameters of soil organic matter: total organic carbon (TOC) and soil microbial carbon (Cmic). We also evaluated three physiological parameters of marandu palisadegrass: stomatal conductance, transpiration rate, and photosynthetic rate. The sampling strategy was evaluated by the Hatheway and Modified Maximum Curvature (MMC) methods.We found that cultivation of the alley with forage grass and double rows of eucalyptus must be considered to ensure sampling representativeness in a silvopastoral system, once TOC and Cmic and physiological parameters showed variation within the integrated production system. The MMC method could be useful to evaluate silvopastoral systems for experiments and characterization of agricultural areas, as 11 soil samples are representative to evaluate Cmic and TOC, and 13 samples are enough to evaluate the physiological parameters in marandu palisadegrass. The Hatheway method could be applied to experiments that need higher accuracy with a reduction in the minimum difference to be detected between the treatments and a consequent increase in the number of samples to be collected.

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Brachiaria physiological parameters in agroforestry systems

Cited by 12 publications

References 9 publications

Shading Effects on Marandu Palisadegrass in a Silvopastoral System: Plant Morphological and Physiological Responses

Shading Effects on Marandu Palisadegrass in a Silvopastoral System: Plant Morphological and Physiological Responses

CRESCIMENTO DE MUDAS DE Peltophorum dubium (Spreng.) Taub. SOB INTERFERÊNCIA DE PLANTAS ESPONTÂNEAS E FORRAGEIRAS

Sampling representativeness of soil carbon and physiological parameters of marandu palisadegrass in a tropical silvopastoral system

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