Nutrient relations during an eucalyptus cycle at different population densities

“…densities less than the optimal favor growth, and those greater than this optimal reduce growth. This has been demonstrated for trees, Rondon (2002) for example, in Schizolobium amazonicum (Huber) Ducke, and by Leite et al (2011) in Eucalyptus grandis. The increase in planting density therefore increases competition for nutrients between plants, and reduces their availability to each plant.…”

Section: Resultsmentioning

confidence: 78%

“…Among the various authors who have studied the problem, differences, when they occur (and they are usually of low magnitude), happen if Ca (or N) is the most abundant, followed by Mg (or K) and finally P (or S). Leite et al (2011) were the only authors to check a discordant sequence (Table 4). Calcium enrichment in the leaf litter may be due to a slower release of this element by the newly-fallen material which makes up the litter (Vieira et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Soil fertility beneath the crown of tree species submitted to planting densities

Siqueira

Silva

et al. 2014

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe aim of this study was to evaluate the nutrient content of leaf litter and the soil beneath the crown of gliricidia (Gliricidia sepium) and sabiá (Mimosa caesalpiinifolia) under different planting densities (400, 600, 800, 1000 and 1200 plants ha -1 ). The experiment was carried out in a randomized block in split plot design, with three replications. The species were assigned to the plots and the densities to the subplots. Samples of litter and soil were collected three years after the trees were planted and submitted for chemical analysis. The Mg content in the litter from the gliricidia was higher than that from the sabiá. There was no difference between the species as to the other elements. The increase in planting density reduced the levels of N and Mg, but did not alter the levels of Ca and P in the litter. The nutrient content in the litter from both species presented the sequence Ca > N > Mg > K > P. There was no difference in soil fertility between soils planted with both species. An increase in density resulted in an increase in the levels of P and Mg in the soil. The contents of Na and Ca first increased and then decreased with the increase in density. The density had no effect on organic matter, K, pH or the potential acidity.Fertilidade do solo sob a copa de espécies arbóreas submetidas a densidades de plantio R E S U M O Objetivou-se, neste trabalho, avaliar os teores de nutrientes da serapilheira e do solo sob a copa da gliricidia (Gliricidia sepium) e sabiá (Mimosa caesalpiinifolia) em densidades de plantio (400, 600, 800, 1000 e 1200 plantas ha -1 ). O experimento foi realizado em blocos ao acaso com três repetições em parcelas subdivididas. As espécies foram aplicadas nas parcelas e as densidades nas subparcelas. As amostras da serapilheira e do solo foram coletadas três anos após o plantio das árvores e submetidas às análises químicas. O teor de Mg na serapilheira da gliricidia foi superior ao da sabiá. Não houve diferença entre espécies quanto aos demais elementos. O aumento da densidade de plantio diminuiu os teores de N e Mg mas não alterou os teores de Ca e P, na serapilheira. As quantidades dos teores dos nutrientes na serapilheira das duas espécies apresentaram a sequência Ca > N > Mg > K > P. Não ocorreu diferença entre solos cultivados com as duas espécies na fertilidade do solo. O aumento da densidade aumentou os teores de P e Mg no solo. Os teores de Ca e Na aumentaram e depois diminuíram com o aumento da densidade. Não se constatou efeito de densidade na matéria orgânica, K, pH nem na acidez potencial.

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“…This may be linked to the different developmental stages of the forest. In each stage, the vegetation displays distinct control forms of nutrient demands through storage and redistribution in biomass [54] ( Table 2). Under similar climate and soil conditions, variation in litter accumulation occurs by both the amount and the composition (contents of lignin, polyphenols and nutrients) of the material deposited, influencing decomposition speed and nutrient release [58].…”

Section: Nutrient Cycling In the Atlantic Forestmentioning

confidence: 99%

Ecological and Environmental Aspects of Nutrient Cycling in the Atlantic Forest, Brazil

Viera¹,

Caldeira²,

Rovani³

et al. 2016

Tropical Forests - The Challenges of Maintaining Ecosystem Services While Managing the Landscape

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In developing countries, where population growth is on the rise, intense anthropogenic actions in natural forests are observed usually in the form of burnings and shallow cuts. With aiming to deploy crops or even promote irrational exploitation of forest products. In this context, preservation of natural forests (tropical and subtropical forests) depends on the knowledge of their dynamics. This information is important to allow exploration of natural forests sustainably or to subsidize conservation actions. In planted and native forests, the biogeochemical cycling of nutrients predominantly occurs through production and decomposition of litterfall. The information provided in this chapter, in particular with regard to nutrient cycling, is an important basis for understanding the structure and dynamics of nutrients in the ecosystem. We characterized nutrient stocks and elucidate some aspects of forest growth and productivity. This information is important to enhance biodiversity conservation and generate ecosystem goods and services in the Atlantic Forest Biome. Even with the intense change of land use (from forest to agricultural, pasture and urbanization), the region has high diversity of endemic species, and is considered a priority area for biodiversity conservation.

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Nutrient relations during an eucalyptus cycle at different population densities

Cited by 33 publications

References 14 publications

Deposição de serapilheira e micronutrientes ao longo das estações do ano em um plantio de eucalipto estabelecido sobre pastagem natural degradada no bioma pampa

Deposição de serapilheira e micronutrientes ao longo das estações do ano em um plantio de eucalipto estabelecido sobre pastagem natural degradada no bioma pampa

Soil fertility beneath the crown of tree species submitted to planting densities

Ecological and Environmental Aspects of Nutrient Cycling in the Atlantic Forest, Brazil

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