DECOMPOSIÇÃO DA SERAPILHEIRA FOLIAR DE FLORESTA NATIVA E PLANTIOS DE &lt;i&gt;Pterogyne nitens&lt;/i&gt; E &lt;i&gt;Eucalyptus urophylla&lt;/i&gt; NO SUDOESTE DA BAHIA

Pinto, Heloísa Cintra Alves; Barreto, Patrícia Anjos Bittencourt; Rodrigues, Emanuela Forestieri da Gama; Oliveira, Francisco Garcia Romeiro Barbosa de; Paula, Alessandro de; Amaral, Aguiberto Ranulfo

doi:10.5902/1980509825105

Cited by 25 publications

(29 citation statements)

References 5 publications

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“…The percentage of remaining biomass in the litter bags still not decomposed was similar to that found in an E. urophylla plantation in the state of Bahia, in which Pinto et al (2016) verified rates of 73.56% at 180 days after the beginning of the experiment. In the state of São Paulo, Bachega et al (2016) at 180 days after experiment initiation, it was 63.00% of the leaf biomass remaining in the litter bags in an E. grandis planting.…”

Section: Leaf Decompositionsupporting

confidence: 81%

“…In the present study, leaf biomass decay was evidenced only after 90 days from experiment initiation. Pinto et al (2016) reported that sugar content was the first to be decomposed over the first three months after leaves fell on the ground; however, lignin content tends to remain constant over a much longer period of time (COSTA et al, 2005). After the first quarter, most of the strongest structures rich in lignin, cellulose, waxes and tannins, such as ribs and petioles, still remain, reducing the rate of decomposition (CARVALHO et al, 2009;LIMA et al, 2015b ;VIERA et al, 2014b).…”

Section: Leaf Decompositionmentioning

confidence: 99%

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Litterfall, litter layer and leaf decomposition in Eucalyptus stands on Cerrado soils

Valadão¹,

Carneiro²,

Inkotte³

et al. 2019

Sci. For.

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The success of Eucalypt cultivation in Brazil was the result of decades of research, improvement of cultivation technologies, along with favorable edaphoclimatic properties. Nowadays, Eucalypt plantations are the main source of wood in the country. However, there are persisting doubts about the impacts on hydric, chemical and biological patters on the soil by this monoculture forest. For this reason, the understanding of the nutrient biogeochemical cycle linked to the litter dynamics contributes to elucidate the changes occurring in the physicochemical and biological properties of the soil. Thus, this work evaluated litterfall, litter layer and leaf decomposition in Eucalypt plantation 60 months-age in the Cerrado area, Distrito Federal. 360 days after experiment initiation, the remaining mass of leaves corresponded to 68.72%, indicating a highly recalcitrant litter. It was concluded that there is an intense production and accumulation of plant material, which undergoes decomposition at a slow rate. This longer time of permanence of litter on the ground provides a favorable niche for edaphic fauna, protecting the superficial layer of the soil by reducing the impact of the kinetic energy of raindrops and allowing for improvement in water infiltration and, consequently, maintenance of the soil hydric capacity.O êxito da eucaliptocultura no Brasil foi resultado de décadas de pesquisa, aprimoramento de tecnologias de cultivo, aliado às propriedades edafoclimáticas favoráveis. Atualmente, os plantios dessa espécie são a principal fonte de madeira no país. Entretanto, dúvidas a respeito de impactos nos padrões hídricos, químicos e biológicos do solo, advindos dessa monocultura florestal ainda carecem de elucidações. Por esta razão, o entendimento do ciclo biogeoquímico de nutrientes ligado à dinâmica da serapilheira contribui para elucidar as modificações que ocorrem nas propriedades físico-químicas e biológicas do solo. Assim, este trabalho avaliou a produção, acúmulo e decomposição de serapilheira em plantio eucalipto aos 60 meses de idade em área de Cerrado no Distrito Federal. Aos 360 dias após o início do experimento, a porcentagem de massa remanescente correspondia a 68,72% indicando uma serapilheira altamente recalcitrante. Conclui-se que há uma intensa produção e acúmulo de material vegetal, porém com uma lenta decomposição. Esse maior tempo de residência da serapilheira proporciona um nicho favorável à fauna edáfica e proteção da camada superficial do solo, por meio da redução do impacto da energia cinética das gotas de chuva, possibilitando assim, uma melhora na infiltração de água e consequentemente manutenção da capacidade hídrica no solo.Palavras-chave: biomassa remanescente, sacolas de decomposição, constante k de decomposição, solo distrófico.

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Section: Leaf Decompositionsupporting

confidence: 81%

Section: Leaf Decompositionmentioning

confidence: 99%

Litterfall, litter layer and leaf decomposition in Eucalyptus stands on Cerrado soils

Valadão¹,

Carneiro²,

Inkotte³

et al. 2019

Sci. For.

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“…Mendonça et al (2015) assessed different grass species grown in consortium system with maize and found higher N leach rates at the first 30 DAI, as well as subsequent stabilization of it. It was justified by Perin et al (2010) and Pinto et al (2016), who found N release correlated to C release (decomposition of residues) in two phases: i) fast decomposition of structural components of easy decomposition (< C/N); ii) slow decomposition of more resistant materials (> C/N).…”

Section: /8mentioning

confidence: 99%

Decomposition and release of nutrients from crop residues on soybean-maize cropping systems

Cavalli

Lange

Cavalli

et al. 2018

Agraria

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Nutrients found in residues from agricultural cultures are important reserves for subsequent crops. The objective was to assess the decomposition and release of nutrients from different crop residues for subsequent soybean cultivation. The study was conducted in Mid-Northern Mato Grosso State, Brazil. The residual straw of cropping systems -maize, brachiaria and maize/brachiaria consortium -were sampled, weighted, disposed in litter bags and then distributed on the soil. The adopted experimental design followed the completely randomized arrangement with three repetitions. Treatments were determined based on harvest time, which was performed every 14 days within 140 days for maize, and within 154 days for brachiaria and for the consortium. The remaining dry matter and nutrients content, and half-time life were evaluated. Maize showed the highest straw dry matter yield (14,176 kg ha -1 ), and the consortium recorded the biggest nutrient accumulation per hectare (K=172.2; N= 141.7 and Ca=56.0 kg ha -1 ). Brachiaria straw presented the fastest decomposition rate (85%) and the highest nutrient release (K=99%; N=92%; Mg=98% and Ca=90% of total initial content). The total K released reached 150 kg ha -1 , which can fit the needs of soybean crops.Key words: crop management; integrated; mixed systems; nutrient cycling Decomposição e liberação de nutrientes de resíduos de culturas no sistema de cultivo soja-milho RESUMO: Os nutrientes contidos nos restos culturais representam uma importante reserva para culturas subsequentes. O objetivo foi avaliar a decomposição e a liberação de nutrientes de diferentes resíduos de culturas para subsequente cultivo da soja. O estudo foi realizado na região Médio Norte do estado de Mato Grosso, Brasil. A palhada residual dos sistemas de cultivo; milho, braquiária e consórcio milho/braquiária foram amostrados, pesados e acomodadas em litter bags e distribuídos sobre o solo. O design experimental foi o inteiramente casualizado com três repetições. Os tratamentos foram estabelecidos com base no tempo de colheita, realizado a cada 14 dias, em um período de 140 dias para o milho e 154 dias para a braquiária e consórcio, aonde foi avaliando a permanência da matéria seca e nutrientes e o tempo de meia vida. O milho apresentou a maior produtividade de matéria seca (14.176 kg ha -1 ), e o consórcio o maior acúmulo de nutrientes por hectare (K=172,1; N= 141,7 e Ca=56,0 kg ha -1 ). A braquiária apresentou a maior taxa de decomposição (85%) e a maior porcentagem de liberação de nutrientes (K=99%; N=92%; Mg=98% e Ca=90% do conteúdo inicial). A quantidade de K liberado pode ser de até 150 kg ha -1 o que pode corresponder às necessidades da soja.Palavras-chave: manejo de culturas; integrados; sistemas mistos; ciclagem de nutrientes Decomposition and release of nutrients from crop residues on soybean-maize cropping systems Rev. Bras.

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“…The decomposition process regulates burlap accumulation and nutrient cycling in forest ecosystems, and is fundamental for its maintenance (Pinto et al, 2016). The decomposition of canopy structures and microorganisms comprise the main source of nutrients for the forest ecosystem.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Litter Accumulation in a Eucalyptus grandis Plantation, Rio Grande do Sul, Brazil

et al. 2020

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This study aimed at quantifying the accumulation of litter in formative compartments (bark, branches, leaves, and miscellaneous) above the soil in a 23-year-old Eucalyptus grandis plantation, located on the campus of the Universidade Federal de Santa Maria, Rio Grande do Sul. We installed four parallel plots on the settlement lines, measuring 3.0 m × 6.0 m. In order for litter collection, we utilized a 25 cm × 25 cm iron frame and randomly collected 15 samples of each plot, totaling 60 samples. The burlap consisted predominantly of branches (39%) and miscellaneous (29%) fraction, followed by leaves (23%) and bark (6%). Such accumulation may be associated with the age of the Eucalyptus grandis, the density of the forest, and the stability achieved by the plantation.The analyzed burlap consisted primarily of branches (39%) and the miscellaneous fraction (29%). This accumulation may be related to the age of the Eucalyptus grandis (23 years), forest density, and the stability reached by the settlement.The leaf fraction was minimally representative (23%) in the accumulated litter. This fact may have occurred due to the period of collection, which was performed at the end of winter, in which leaf fall is reduced. The bark fraction was also poorly representative, contributing only with 6% in the accumulation of burlap.

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DECOMPOSIÇÃO DA SERAPILHEIRA FOLIAR DE FLORESTA NATIVA E PLANTIOS DE <i>Pterogyne nitens</i> E <i>Eucalyptus urophylla</i> NO SUDOESTE DA BAHIA

Cited by 25 publications

References 5 publications

Litterfall, litter layer and leaf decomposition in Eucalyptus stands on Cerrado soils

Litterfall, litter layer and leaf decomposition in Eucalyptus stands on Cerrado soils

Decomposition and release of nutrients from crop residues on soybean-maize cropping systems

Litter Accumulation in a Eucalyptus grandis Plantation, Rio Grande do Sul, Brazil

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