Phytomass and nutrient release in soybean cultivation systems under no-tillage

Miguel, Andressa Selestina Dalla Côrt São; Pacheco, Leandro Pereira; Carvalho, Ícaro Camargo de; Souza, Edicarlos Damacena de; Feitosa, Priscilla Barros; Petter, Fabiano André

doi:10.1590/s0100-204x2018001000005

Cited by 24 publications

(17 citation statements)

References 15 publications

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“…It was verified that the cultures of U. ruziziensis and P. glaucum, independently of the soil scarification, promoted higher accumulations of K in the shoot dry matter than the other cover crops and, mainly, the respective fallows with spontaneous vegetation, providing increases of K contents from 10 to 20 times ( Figure 2). According to results obtained by Miguel et al (2018) in the Cerrado of low altitude, which verified that the U. ruziziensis promotes a significant increase in the cycling of nutrients, mainly the potassium accumulated in the aerial part.…”

Section: Resultsmentioning

confidence: 62%

Soil mechanical scarification increases the dry matter yield of cover crops under no-tillage

Nascimento¹,

Arf²,

Alves³

et al. 2019

Idesia

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Soil mechanical scarification (MS) and cover crop growing (CC) are strategies to minimize compaction in the soil surface layer under the no-tillage system (NTS). The objective of this study was to evaluate the effects of soil mechanic scarification on the yield and nutrient accumulation in the shoot dry matter of cover crops, as well as the persistence of crop residues in NTS, implemented 12 years ago in the Cerrado conditions with low altitude. The study was carried out in Selvíria, Mato Grosso do Sul state, Brazil, in the 2012 and 2013 harvest, in a clay soil classified as Oxisol Red epi-eutrophic alic. The experimental design was a randomized block arranged in a 5 × 2 factorial scheme, with four replicates. The treatments were constituted by the combination of four cover crops (Cajanus cajan, Crotalaria juncea, Urochloa ruziziensis and Pennisetum glaucum) and fallow with spontaneous vegetation, with or without MS. Soil MS increases the shoot dry matter yield of P. glaucum, U. ruziziensis and C. cajan in the first crop. The P. glaucum species, independently of soil scarification, provide higher yield and accumulation of macronutrients in the shoot dry matter, besides provide higher persistence of crop residues. The U. ruziziensis and C. cajan, independently of soil scarification, have the potential for accumulation of N, P, K and Ca in the shoot dry matter, although with less persistence of residues on the soil surface.

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Section: Resultsmentioning

confidence: 62%

Soil mechanical scarification increases the dry matter yield of cover crops under no-tillage

Nascimento¹,

Arf²,

Alves³

et al. 2019

Idesia

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“…Urochloa can accumulate between 2 and 16 Mg of dry matter ha −1 in their aerial parts, per year, in crop rotation or intercropping (Macedo, 2009;Bernardes et al, 2010;Costa et al, 2016;São Miguel et al, 2018), with the amount varying according to the species and the system management practices adopted, such as fertilization and cutting timing/frequency.…”

Section: Shoot Biomass and Nutrient Accumulation In Urochloamentioning

confidence: 99%

“…Residues from Urochloa species, such as U. ruziziensis, for example, have a high C:N ratio in their biomass if compared to other Poaceae residues (Souza et al, 1999) or to legumes, which have low C:N ratio. Although it is beneficial for soil conservation to maintain soil coverage for longer periods in a tropical environment, this practice can slow down nutrients release (São Miguel et al, 2018;Momesso et al, 2019).…”

Section: Decomposition Of Urochloa Residues and Nutrient Releasementioning

confidence: 99%

Urochloa in Tropical Agroecosystems

Baptistella¹,

Andrade

Favarin³

et al. 2020

Front. Sustain. Food Syst.

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Increasing biodiversity is an important issue in more secure and sustainable agriculture. Diversified systems are more resilient to climate change, environmental stresses and enhance soil health, nutrient cycling and nutrient use efficiency. In tropical agroecosystems, cover crops and intercrops are an alternative toward a more diverse and sustainable production. Urochloa spp. (syn. Brachiaria spp.) are perennial grasses, known for their high biomass production. They are commonly used as cover and companion crops in conservation agriculture in the tropics and the residues left in the field after cutting protect the soil and provide nutrient to the next crop cycle or intercropped culture. Urochloa species roots are vigorous, abundant and deep, as opposed to the more shallow and scarce roots of common crops. These traits contribute to carbon sequestration, soil organic matter stabilization and nutrient cycling. Urochloa roots also improve soil physical characteristics and influence soil nutrient dynamics, reducing nutrient losses and enhancing cycling, what is key to achieve greater nutrient use efficiency in agriculture. For instance, Urochloa root exudates can reduce nitrogen losses by denitrification and leaching through a process called biological nitrification inhibition; root exudates can mobilize recalcitrant phosphorus from soils and make it available for plant uptake; the deep roots of these grasses have the potential to recover nutrients that are virtually lost away from the root zone of other crops. This review compiles scientific progress regarding the introduction of Urochloa in agroecosystems, mainly on the aspects related to the contribution to more secure and sustainable agriculture.

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“…Nitrogen fertilization influenced all evaluated variables, except for morphological composition (in percentage) (Table 1), since nitrogen is one of the nutrients most extracted by forages (SAN MIGUEL et al, 2018), which is very important in maintenance fertilization.Regarding the regression models, there was similarity between B. hybrid, B. humidicola and P. maximum only for NL and LeafM, which shows the difference in response pattern of this hybrid to a forage of low (B. humidicola) and high (P. maximum) requirement in nitrogen.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen requirement of Brachiaria hybrid cv. Ipyporã

Cabral¹,

Cabral²,

Tesk³

et al. 2020

Bol. Ind. Anim.

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Resumo O capim Ipyporã, um híbrido interespecífico de Brachiaria, foi desenvolvido através do cruzamento de um genótipo de Brachiaria ruziziensis (sin. Urochloa ruziziensis) e um acesso de Brachiaria brizantha (sin. Urochloa brizantha), que possuem diferentes exigências de nitrogênio. O objetivo com este trabalho foi verificar a necessidade de nitrogênio do híbrido interespecífico de Brachiaria hibrida cv. Ipyporã. O experimento foi conduzido em casa de vegetação, em delineamento de blocos ao acaso, com doze tratamentos e quatro repetições. Os tratamentos corresponderam a um fatorial 4x3, sendo quatro doses de nitrogênio (0, 100, 200 e 300 mg/dm 3 ) e três gramíneas forrageiras (B. hibrida cv. BRS Ipyporã, B. humidicola cv. Llanero e Panicum maximum cv. Zuri). Cada parcela experimental foi constituída por vaso de 3 dm³ com três plantas. Foram realizados três cortes de avaliação. A B. hibrida Ipyporã obteve maior resposta à adubação nitrogenada para número de perfilhos e de folhas em relação aos demais capins. Entretanto, para a massa seca total, observou-se que a B. hibrida foi menos responsiva ao nitrogênio que o capim P. maximum (alta exigência) e mais responsivo que B. humidicola (baixa exigência), o que mostra que esse híbrido é uma forrageira com média demanda em nitrogênio. Palavras -chave adubação nitrogenada, teste de identidade de modelos, Urochloa híbrida Abst ractIpyporã grass, a Brachiaria interspecific hybrid was developed by crossing a genotype of Brachiaria ruziziensis (syn. Urochloa ruziziensis) and an access of Brachiaria brizantha (syn. Urochloa brizantha), which have different nitrogen requirements.Therefore, the objective with work was to verify the nitrogen requirement of the interspecific hybrid of Brachiaria hybrid cv.Ipyporã. Experiment was carried out in a greenhouse in a randomized block design, with twelve treatments and four replications. Treatments consisted of a 4 x 3 factorial arrangement, with four nitrogen doses (0; 100; 200 and 300 mg/dm³) and three forages (Brachiaria hybrid cv. BRS Ipyporã, Brachiaria humidicola cv. Llanero and Panicum maximum cv. Zuri). Each experimental plot consisted of a 3 dm³ pot with three plants. Three evaluation harvest were done. B. hybrid had greater response to nitrogen fertilization for number of tillers and leaves than the other forages. However, for the total dry mass, B. hybrid was less responsive to nitrogen than P. maximum grass (high demand) and more responsive than B. humidicola (low demand), which shows that this hybrid has medium nitrogen requirement.

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Phytomass and nutrient release in soybean cultivation systems under no-tillage

Cited by 24 publications

References 15 publications

Soil mechanical scarification increases the dry matter yield of cover crops under no-tillage

Soil mechanical scarification increases the dry matter yield of cover crops under no-tillage

Urochloa in Tropical Agroecosystems

Nitrogen requirement of Brachiaria hybrid cv. Ipyporã

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