Reducing competition in a crop–livestock–forest integrated system by thinning eucalyptus trees

Pezzopane, José Ricardo Macedo; Bonani, W. L.; Bosi, Cristiam; Rocha, Eduardo L.; Bernardi, A. C. de C.; Oliveira, P. P. A.; Pedroso, A. de F.

doi:10.1017/s0014479720000162

Cited by 16 publications

(18 citation statements)

References 32 publications

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“…One might question the suitability of eucalypts for these silvopastoral systems because of their high levels of competition for water, light and nutrients. Pruning and thinning of the trees have been implemented in an endeavor to reduce competition and these practices have been recommended in the literature (Santos et al 2016;Lima et al 2018;Pezzopane et al 2019Pezzopane et al , 2020 to reduce radiation interception starting from the 6th to 8th year after establishment. However, eucalyptus trees retain a competitive advantage over pasture even after thinning and tree stands recover rapidly and increase their competition with pasture (Back et al 2009).…”

Section: Discussionmentioning

confidence: 99%

Beef cattle production on Piatã grass pastures in silvopastoral systems

Pereira

Morais

Fernandes

et al. 2021

Trop. grassl.-Forrajes trop.

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Tropical beef cattle production involving animals grazing in a shaded and biologically diverse environment, surrounded by high-quality edible biomass, is achievable through silvopastoral systems (SPSs). However, it is necessary to assess the effects of the presence of trees on forage and animal performance over time. In the Brazilian Cerrado, we evaluated the effects of 2 densities of eucalyptus trees in 2 SPSs (8 years of age - SPS22: 227 trees/ha; SPS14: 357 trees/ha) on forage morphology, production and nutritive value of Urochloa brizantha cv. BRS Piatã grass plus performance of Nellore heifers, compared with a grass-only pasture, over a year from 2015 to 2016. On the one hand, SPSs improved (P<0.001) forage nutritive value as reflected in higher crude protein and digestibility and lower neutral and acid detergent fiber concentrations compared with a grass-only pasture. On the other hand, the grass-only pasture had higher (P<0.001) herbage mass and accumulation rate than the SPSs. Forage growth and animal production decreased with higher tree density. Increasing competition from trees with age could be a serious issue limiting pasture and animal production and should be monitored. The suitability of eucalyptus trees for planting in SPSs may be questionable after the 8th year of establishment and further studies are warranted.

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Section: Discussionmentioning

confidence: 99%

Beef cattle production on Piatã grass pastures in silvopastoral systems

Pereira

Morais

Fernandes

et al. 2021

Trop. grassl.-Forrajes trop.

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“…Pezzopane et al (2020a) verificaram que, a partir de 35% de sombreamento das árvores, já se verifica redução da produção de pastagem e, como consequência, redução na capacidade de lotação animal. No entanto, a prática de desbaste das árvores pode reverter essa situação (Pezzopane et al, 2020b), ressaltando a importância da orientação técnica em práticas de manejo em sistemas de integração.…”

Section: Produtorunclassified

Sistemas de integração lavoura-pecuária-floresta no estado de São Paulo: estudo multicasos com adotantes pioneiros

Vinholis

Carrer

Filho

et al. 2022

Rev. Econ. Sociol. Rural

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Resumo: Pastagens degradadas têm baixa produtividade e impactos ambientais negativos. Sistemas que integram pecuária, lavoura e/ou floresta apresentam-se como uma alternativa para reverter esse cenário, mas sua adoção é heterogênea entre os produtores rurais. O objetivo deste estudo é investigar os fatores que influenciaram as primeiras decisões de adoção e a difusão a partir dos adotantes pioneiros. Três casos de adotantes pioneiros do estado de São Paulo foram investigados por meio de análise descritivo-exploratória. Os resultados mostram que instituições que atuam como intermediárias entre produtores rurais e outras instituições do sistema inovação têm um papel relevante na adoção, adaptação e difusão dos sistemas de integração. Cooperativas agropecuárias, associações de produtores rurais e serviços de extensão rural são exemplos de instituições intermediárias que cumpriram esse papel ao exercerem várias funções: auxiliaram no fluxo de informações, forneceram orientação técnica, apoiaram a comercialização e facilitaram o acesso ao financiamento e aos mecanismos de gestão de risco. Adicionalmente, identificou-se que as características pessoais do produtor pioneiro como experiência em atividades agropecuárias e sua capacidade de inovação (curiosidade por novidades, comunicação interpessoal e tolerância ao risco) também foram importantes para a adoção e adaptação dos sistemas de integração.

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“…In another study conducted in the same area after the thinning, during the driest period of the experiment (between May and September 2017) SP3 had higher soil water content than FS and SP1, which had lower values (Pezzopane et al, 2020b). The authors pointed at higher water consumption in the zone close to the trees due to water uptake by the tree roots.…”

Section: Soil Water Contentmentioning

confidence: 92%

“…After thinning the trees, PAR transmission varied from 55.6% to 73.1% among the four observed zones with lower values in autumn and winter (February 2017 to February 2018); the eucalyptus trees were about 28.6 m high during these PAR evaluations (Pezzopane et al, 2020b). That modification in PAR along the years shows the dynamism of the system and the necessity of management of trees to regulate the amount of shade projected on the grass.…”

Section: Par Transmissionmentioning

confidence: 93%

“…In July 2016 half of the trees were thinned, leaving 116 trees ha -1 with 15 m between rows and 4 m between trees. The experimental site was used before for other studies in different stages of the silvopastoral system development, before thinning (Pezzopane et al, 2020a; and after thinning (Pezzopane et al, 2020b). To investigate the effect of the tree's presence in the pasture, we conducted an experiment analysing different zones within the observed paddocks.…”

Section: Study Sitementioning

confidence: 99%

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APSIM - Tropical Pasture parameterization for biomass production, light and water competition in a silvopastoral system with >i<B. brizantha>/i< cv. Piatã and >i<E. urograndis>/i<

Balcão¹

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Dados Internacionais de Catalogação na Publicação DIVISÃO DE BIBLIOTECA -DIBD/ESALQ/USP Balcão, Lucas Fillietaz APSIM -Tropical Pasture parameterization for biomass production, light and water competition in a silvopastoral system with B. brizantha cv. Piatã and E. urograndis / Lucas Fillietaz Balcão. --versão revisada de acordo com a resolução CoPGr 6018 de 2011. --Piracicaba, 2021. 79 p. Tese (Doutorado) --USP / Escola Superior de Agricultura "Luiz de Queiroz". 1. Sistema silvipastoril 2. Radiação fotossinteticamente ativa 3. Modelagem de processos I. Título ABSTRACT APSIM -Tropical Pasture parameterization for biomass production, light and water competition in a silvopastoral system with B. brizantha cv. Piatã and E. urograndisThe SSP are characterised by associating trees with herbaceous forages in the same area with the presence of animals. In general, the prognosis about productivity is correlated with meteorological variables, such as air temperature and precipitation. To estimate the productive capacity of agricultural systems, mathematical modelling can be used. The present work aims to parameterise the APSIM model (Agricultural Production Systems sIMulator) to estimate the production of forage biomass in a SSP, as well as the competition for light and water. In the first stage, a field experiment was carried out in a silvopastoral system, where microclimate data were collected, of forage production and soil moisture. The experimental design was completely randomised with repeated measures over time. Forage production was analysed in relation to microclimate variables. A multiple factor analysis (AFM) was performed to verify which micrometeorological variables have a greater participation in the variability of the results. Based on this information, the APSIM model was parameterized in relation to the growth of forage plants.To evaluate the efficiency of the model, multiple linear regression analyses and coefficient of determination (R2), Nash-Sutclif Efficience (NSE), mean error (EM) and mean absolute error (EAM) were used. The APSIM-Slurp model simulated well the light interception (R² = 0.64 NSE = 0.60). APSIM-Tropical Pasture model showed a good performance to simulate pasture biomass (R² = 0.90 NSE = 0.72), leaf (R² = 0.82 NSE = 0.44), stem (R² = 0.82 NSE = 0.75) and an acceptable performance for pasture leaf area index (R² = 0.76 NSE = 0.58).

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Reducing competition in a crop–livestock–forest integrated system by thinning eucalyptus trees

Cited by 16 publications

References 32 publications

Beef cattle production on Piatã grass pastures in silvopastoral systems

Beef cattle production on Piatã grass pastures in silvopastoral systems

Sistemas de integração lavoura-pecuária-floresta no estado de São Paulo: estudo multicasos com adotantes pioneiros

APSIM - Tropical Pasture parameterization for biomass production, light and water competition in a silvopastoral system with >i<B. brizantha>/i< cv. Piatã and >i<E. urograndis>/i<

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