Capim Tropical Manejado Sob Lotação Intermitente, Submetido a Fontes De Fósforo Com Diferentes Solubilidades, Associados Ou Não À Adubação Com Nitrogênio

Duarte, Camila Fernandes Domingues; Paiva, Luísa Melville; Fernandes, Henrique Jorge; Biserra, Thiago Trento; Fleitas, Alex Coene

doi:10.1590/1089-6891v20e-47692

Cited by 5 publications

(7 citation statements)

References 10 publications

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“…The action of phosphorus fertilization in improving soil fertility on leaf elongation, leaf length and tiller population density is directly expressed on the IAF of the pasture, which can be demonstrated by the positive correlation of IAF with other variables, such as TAPF, TALF and DPP, resulting in greater forage production (PONTES et al, 2010). IAF values between 3.4 and 4.8 were reported by Duarte et al (2019), who analyzed tropical grass managed under intermittent stocking, fertilized with phosphorus sources with different solubilities, combined or not with nitrogen; the authors also report that the higher amounts of P in the soil enable greater growth and accumulation of leaves, which resulted in increased IAF, a fact observed in the present study. There was an effect (P <0.05) of phosphorus fertilization and the production system on DPP and TCC (Table 4).…”

Section: Resultssupporting

confidence: 81%

Phosphorus fertilization in the implantation of a silvopastoral system: morphogenic and structural characteristics of Mombaça grass

Pacheco

Sousa

Santos

et al. 2021

Rev. bras. saúde prod. anim.

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The objective of this study was to evaluate the effect of phosphate fertilization on morphogenic and structural characteristics of Mombasa grass under conditions of implantation of silvopastoral system with eucalyptus and monoculture in the Amazon/Cerrado ecotone. The experiment was conducted at UFT-EMVZ during the rainy seasons of the 2016/2017 and 2017/2018 agricultural years. The experimental area was subdivided into two cultivation systems, Mombaça grass monoculture, with 0.25 hectare and silvopastoral system, intercropping eucalyptus with Mombaça grass, with 0.75 hectare area. The design used was a 4 x 2 factorial IHD with four doses of phosphorus (0; 50; 100; 200 kg.ha -1 P2O5 year-1) and two cultivation systems (monoculture and silvopastoral) with three repetitions. Three cycles were evaluated for an average rest period of 21 days. Weekly measurements were taken to evaluate structural and morphogenic characteristics of plants. In general, factors tested such as phosphorus fertilization, cultivation system and year (implantation and following year) showed influence, altering the development of Mombaça grass, reflecting on the morphogenic and structural characteristics. Tiller population density, crop growth rate, leaf area index showed interactions between phosphorus fertilization and the cultivation systems analyzed (P <0.05). Phosphorus fertilization used in the implantation, moment of greatest requirement of the plant, influenced forage development by increasing the crop growth rate, leaf appearance, as well as leaf and stem elongation in the two evaluated systems.

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Section: Resultssupporting

confidence: 81%

Phosphorus fertilization in the implantation of a silvopastoral system: morphogenic and structural characteristics of Mombaça grass

Pacheco

Sousa

Santos

et al. 2021

Rev. bras. saúde prod. anim.

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“…The number of tillers for both grasses in all treatments with irrigation depths stabilized already in the establishment phase, with no significant death and emergence of new tillers for the following two growth phases ( Figure 5). Paiva, Fernandes, Biserra, & Fleitas, 2019). Thus, the increase in leaf elongation rate due to the better availability of water in the soil, provided, in a linear way, an increase in the number of leaves.…”

Section: Resultsmentioning

confidence: 99%

“…The number of live leaves of tiller, despite being a genetically conditioned structural characteristic, its expression is dependent on environmental conditions such as water and nutrient availability (Duarte, Paiva, Fernandes, Biserra, & Fleitas, 2019). Thus, the increase in leaf elongation rate due to the better availability of water in the soil, provided, in a linear way, an increase in the number of leaves.…”

Section: Resultsmentioning

confidence: 99%

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Morphophysiology of tropical grasses under different water supply in two growing seasons: II. BRS Massai and BRS Tamani grasses

Maranhão

Pompeu

Araújo

et al. 2021

Semina: Ciênc. Agrár.

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This study aimed to evaluate the physiological parameters and the biomass flow and structural characteristics of BRS Massai and BRS Tamani grasses under different irrigation conditions. The rating of gas exchange, biomass flow and structural characteristics were performed in dry periods and dry/rainy season, under the water supply of 30; 60; 90 and 120% of the reference evapotranspiration (ETo). The experimental design was completely randomized in a factorial arrangement 4x2 (water supply and grass). The experiment was conducted in pots with capacity for 7.5 dm³, using as substrate layer of 0-0.2 m soil. There was no effect (P < 0.05) between the gas exchange in the dry period, having the largest growing parameters of irrigation schemes. In the transition period of dry/rainy, we observed a reversal behavior in relation to the dry period, showing a rapid recovery of grasses under the minor water supply. It was observed quadratic behavior to concentrations of CO2 in the leaf mesophilic (Ci) with maximum point to the BRS Massai grass and minimum point to the BRS Tamani grass, where the major and minor Ci were 119 and 48 ppm in the water supply of 107 and 35% of ETo, respectively. In relation to the biomass flow, the BRS Tamani grass presented greater stem elongation rate and leaf senescence rate in relation to BRS Massai in both periods assessed. In the dry period, we observed a higher biomass production of green leaf blades in the BRS Tamani grass, while in the transition dry/rainy season, the results for this variable were similar, and at the same time that observed higher accumulation of green culm biomass to the BRS Tamani grass, which certainly affected its structure. It is concluded that the application of a minimum daily water supply of 30% of ETo allows the maintenance of BRS Massai and BRS Tamani grasses without incurring the death of tillers and reduction of regrowth vigor, whereas the water supply of 90% of ETo favors the morphophysiological characteristics, especially of BRS Tamani grass.

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“…However, adequate environmental (e.g., temperature, humidity, luminosity, and availability of nutrients) and management conditions must be met for this to be achieved. Among these conditions, the low availability of nutrients in tropical regions is certainly one of the main factors that interfere with forage productivity and quality (Duarte, Paiva, Fernandes, Biserra, & Fleitas, 2019). Thus, nutrient application in adequate quantities and proportions, through the use of fertilizers, is an essential practice to increase pasture production, and many alternatives have been studied, mainly to increase the efficiency of growth and production of plants.…”

Section: Introductionmentioning

confidence: 99%

Growth bioestimulant in marandu grass cultivated in the amazon biome

Reis

Oliveira

Silva

et al. 2020

Semina: Ciênc. Agrár.

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This study aimed to evaluate the effects of a biostimulant on the morphogenesis, structure, productivity, and chemical composition of Urochloa brizantha cv. Marandu, managed under two nitrogen fertilization levels. Collections were carried out during the dry (June to September) and the rainy season (September to April). The experimental area was divided into 48 plots of 8 m2 each, using a randomized block design in a 4 × 2 factorial arrangement (0, 1, 2, and 3 L ha−1 of biostimulant × 50 and 150 kg N ha−1 year−1), and subdivided over time into dry and rainy seasons. Treatments were applied in a single dose. An interaction was observed between biostimulant and nitrogen fertilization for the total forage dry matter production and daily forage dry matter production, in which an increase of 30.1 and 25.3% was observed in the total dry matter production and 33.7 and 27.6% in the daily dry matter production when using 1 and 2 L ha−1 of biostimulant, respectively, compared to the non-application of biostimulant and with fertilization of 50 kg N ha−1 year−1. The leaf life-span showed a triple interaction (biostimulant × nitrogen fertilization × season), and a decomposition of the interaction showed that the fertilization of 150 kg N ha−1 year−1 provided a shorter leaf life-span during the dry season, with no difference for the other combinations of factors. No interactions were found for the chemical-bromatological composition, with no differences for the biostimulant application. Biostimulant doses of 1 and 2 L ha−1 increase the dry matter production per hectare in the nitrogen fertilization of 50 kg N ha−1 year−1, but its action is not effective with the highest nitrogen fertilization (150 kg N ha−1 year−1).

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Capim Tropical Manejado Sob Lotação Intermitente, Submetido a Fontes De Fósforo Com Diferentes Solubilidades, Associados Ou Não À Adubação Com Nitrogênio

Cited by 5 publications

References 10 publications

Phosphorus fertilization in the implantation of a silvopastoral system: morphogenic and structural characteristics of Mombaça grass

Phosphorus fertilization in the implantation of a silvopastoral system: morphogenic and structural characteristics of Mombaça grass

Morphophysiology of tropical grasses under different water supply in two growing seasons: II. BRS Massai and BRS Tamani grasses

Growth bioestimulant in marandu grass cultivated in the amazon biome

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