Leaf anatomy of 'Marandu' grass cultivated in plant arrangements in agrosilvopastoral systems

Santos, Maurinho Luiz dos; Ferreira, Evander Alves; Cruz, Priscila Junia Rodrigues da; Ribeiro, Victor Hugo Vidal; Alencar, Brenda Thais Barbalho; Cabral, Cássia Michelle; Francino, Dayana Maria Teodoro; Aspiazú, Ignácio

doi:10.1590/s0100-204x2018001200004

Cited by 6 publications

(5 citation statements)

References 21 publications

(28 reference statements)

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“…According to Catuchi et al (2019), the high amounts of dry mass produced by this species are very useful for straw production for no-till purposes. Even when grown during the dry season or under partially shaded conditions -such as intercropping systems -palisade grass produced 3,884 kg ha -1 and 2,709 kg ha -1 of dry matter at 0.5 and 0.7 m row spacing's respectively (Table 2), thus confirming its adaptability to intercropping systems at early growth stages (Santos et al, 2018b).…”

Section: Dry Mass Production For Sorghum and Grassesmentioning

confidence: 73%

“…From 60 DAE onwards, the sorghum leaf area naturally decreases (senescence), and the grasses´ growth may be intensified. Therefore, as shown by the growth ratios for the forage grasses, the main limiting factor for forage biomass production is light, which is essential to the photosynthesis process (Santos et al, 2018b). Thus, the higher light interception results in higher dry matter accumulation and growth indexes for the forage species, which is confirmed by the final dry matter production (Table 2), although in the off-season in the Cerrado there are limited conditions for the grasses to develop (Sato et al, 2017).…”

Section: Growth and Development Of Sorghum And Grassesmentioning

confidence: 79%

“…No significant effects of competition were observed between the intercropped species, since there were no differences between systems in terms of sorghum grain yield or forage dry matter production (Table 2). The right combination of crops in intercropping systems does not affect these parameters (Borges et al, 2018;Santos et al, 2018b). Furthermore, even when certain Urochloa species may compete and become weeds to crops due to their high regrowth ability (Nakao et al, 2019), the use of an herbicide at the desiccation operation is effective to control palisade and Congo grasses before the summer crop (Sodré-Filho et al, 2014).…”

Section: Dry Mass Production For Sorghum and Grassesmentioning

confidence: 99%

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Intercropping sorghum and grasses during off-season in Brazilian Cerrado

Filho¹,

Marchão

Carmona

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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Sorghum (Sorghum bicolor (L.) Moench) may be harmlessly intercropped with Urochloa species during the off-season in the Brazilian Cerrado. At the end of the sorghum cycle, forages can be used for straw production for soybean (Glycine max L.) as the summer crop. This study aimed to evaluate sorghum cultivated during the off-season, intercropped with palisade grass (Urochloa brizantha cv. 'Marandu' (Hochst. ex A. Rich). R. D. Webster) and Congo grass (Urochloa ruziziensis (R. Germ. and Evrard) Crins) in two row spacings (0.5 and 0.7 m) for their effect on plant growth, dry mass production, sorghum yield and soybean grain yield.The experiment was a randomized block design: a 3 × 2 factorial scheme, with three levels of intercropping (palisade grass, Congo grass or sole cropping) and two levels of row spacing (0.5 or 0.7 m) with four replicates. Several physiological growth indexes were estimated from 10 to 60 days after emergence (DAE), including dry matter production and sorghum agronomic performance. Sorghum accumulated 0.22 g of dry matter d -1 at 10 to 60 DAE, and was not affected by intercropping. The dry mass gain of forages (0.04 g d -1 on average) was not affected by sorghum either. Higher sorghum grain yield (2,922 kg ha -1 ) was observed under the 0.5-m row spacing when compared to the 0.7-m spacing. The results indicate that palisade or Congo grass may be used as companion crops for sorghum with no grain yield loss, be it to improve soybean grain yield, soil cover or integrated crop systems, aiming at sustainable intensification.

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Section: Dry Mass Production For Sorghum and Grassesmentioning

confidence: 73%

Section: Growth and Development Of Sorghum And Grassesmentioning

confidence: 79%

Section: Dry Mass Production For Sorghum and Grassesmentioning

confidence: 99%

See 1 more Smart Citation

Intercropping sorghum and grasses during off-season in Brazilian Cerrado

Filho¹,

Marchão

Carmona

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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“…Additionally, the plants lengthen their leaves, increasing the leaf area in an attempt to capture more light. Santos et al (2018) studied Marandu grass monoculture (full sun), two eucalyptus planting spacings (12x2 and 12x4 m), and three distances between Marandu grass and eucalyptus rows (6, 4, and 2 m) and found a decrease of leaf blade thickness of grass in higher levels of shade (12x2 m, 58.2%) probably due to a difference in the distribution of photoassimilates. These authors add that under a certain range of shading, a greater amount of photoassimilates is used by the plants to increase the leaf area to enhance the absorption of available light.…”

Section: Days Ab B Amentioning

confidence: 99%

Structure and nutritional value of BRS Zuri grass under shading

Janusckiewicz

Paiva

Fernandes

et al. 2021

Rev. bras. saúde prod. anim.

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The objective was to determine the structural and nutritive parameters for Panicum maximum cv. BRS Zuri under a Eucalyptus shading system, in rainy and dry seasons. At the beginning of each season, the treatments (foliar fertilization levels of 0, 3, 6 and 9 L ha-1) were applied and evaluated at 28, 56, and 84 growing days. The treatments did not affect significantly (p ≥ 0.05) the evaluated parameters. The systems (shading and full sun) and seasons did not change (p ≥ 0.05) forage and root masses. The leaf crude protein content was higher (p ≤ 0.05) in the dry season. Height, leaf mass, stem and dead material, neutral and acid detergent fiber contents, and in vitro dry matter digestibility were affected (p ≤ 0.05) by the system x season. The growing days did not affect (p ≥ 0.05) forage mass. The mass of dead material decreased (p ≤ 0.05) over the evaluated intervals. The other parameters were affected (p ≤ 0.05) by system × growing days. Based on the results, the forage and root masses show that the cv. BRS Zuri is adapted to the shading in the proposed experimental conditions. These masses added to the crude protein content indicate adaptation to low rainfall, inherent to the dry season, while foliar fertilization applied at the beginning of seasons did not affect the structural and nutritive parameters of BRS Zuri grass.

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“…A quantidade de radiação que chega até as espécies do sub-bosque pode causar mudanças morfológicas nessas plantas (SANTOS et al, 2018b). Se os níveis de redução de luz forem muito intensos, poderá ultrapassar os limites de tolerância ao sombreamento das espécies coexistentes, passando a haver dominância total das copas das árvores.…”

Section: Revisão Bibliográfica 21 Ambiente Luminosounclassified

Efeito Do Ambiente Luminoso Em Forrageiras De Clima Tropical Em Sistemas Silvipastoris

Santos

Gomes

Ximenes³

et al. 2020

NAT

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Alterações no ambiente luminoso provocam mudanças adaptativas nas plantas, na tentativa de manter o seu crescimento e desenvolvimento. Objetivou-se com esta revisão investigar e descrever o efeito do ambiente luminoso no crescimento e desenvolvimento de forrageiras de clima tropical em sistemas silvipastoris. A compreensão da influência do ambiente luminoso e, das mudanças biológicas que as diferentes intensidades do sombreamento podem causar nas forrageiras de clima tropical, possibilita fundamentar as alterações metabólicas das respostas das plantas na tentativa de se manterem persistentes em sistemas sombreados. A partir disso, entender quais são os níveis aceitáveis de radiação para que os sistemas de produção sombreados não entrem em colapso é fundamental para que tomadas de decisões sejam realizadas no tempo hábil do ciclo biológico das espécies vegetais. Em sistemas silvipastoris, a redução da luz incidente em forrageiras de clima tropical provoca alterações como aumento da área foliar específica, redução na densidade populacional de perfilhos e na relação raízes: parte aérea da planta. Cada espécie ou cultivar apresenta características adaptativas específicas ao sombreamento com a finalidade de aproveitar os recursos disponíveis em tecidos fotossintéticos e de suporte. No entanto, ainda assim o sombreamento intenso (>40%) afeta negativamente a produção forrageira de acordo com a variabilidade climática. Palavras-chave: adaptação morfofisiológica; fotossíntese; luz; plantas C4. EFFECT OF THE LIGHT ENVIRONMENT IN TROPICAL CLIMATE FORAGES IN SILVOPASTORAL SYSTEMS ABSTRACT: Changes in the light environment cause adaptive changes in plants, to maintain their growth and development. The aim of this review is to investigate and describe the light environment effect on the growth and development of tropical forages in silvopastoral systems. The understanding of the influence of the light environment and the biological changes that different shading intensities can cause in tropical forages, makes it possible to substantiate the metabolic alterations of plant responses to remain persistent in shaded systems. From this, understanding what are the acceptable levels of radiation so that the systems do not collapse is essential for decision-making to be carried out in a timely manner in the plant's biological cycle. In silvopastoral systems, a light incidence reduction on tropical forages causes changes such as an increase in the leaf area index, reduction in the tiller population density, and shoot: root ratio. Each species or cultivar has adaptive characteristics specific to shading to take advantage of the resources available in photosynthetic and support tissue. However, even so, the intense shading (> 40%) negatively affects forage production according to climatic variability. Keywords: morphophysiological adaptation; photosynthesis; light; C4 plants.

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Leaf anatomy of 'Marandu' grass cultivated in plant arrangements in agrosilvopastoral systems

Cited by 6 publications

References 21 publications

Intercropping sorghum and grasses during off-season in Brazilian Cerrado

Intercropping sorghum and grasses during off-season in Brazilian Cerrado

Structure and nutritional value of BRS Zuri grass under shading

Efeito Do Ambiente Luminoso Em Forrageiras De Clima Tropical Em Sistemas Silvipastoris

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