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Previous issue date: 2012-08-14 / CAPES / Planting spacing in mixed stands interferes in the competition for environment elements, in the control of unwanted species and in forest succession facilitation. Therefore among other variables, it will affect species growth, as well as vegetation nutrients cycling and consequently litter deposition. On a restoration planting, in Serop?dica (RJ), were employed different spacing, 1 m x 1 m; 1.5 m x 1.5 m; 2 m x 2 m and 3 m x 2 m, and six species were studied as to its growth during six years after planting. The variables evaluated were total height (m) and diameter at ground level (DGL), in order to and canopy area, those were used to compare average growth in two periods, the third and sixth year after plantation. The species behaviors in all characteristics were different, at three and six years old, where, 1 m x 1 m spacing provided smaller values. Deciduous material was studied during two years. In 1 m x 1 m spacing was observed the largest litter deposition, and no differences between the units of the other spacing. The fraction leaves showed in all spacing greater supply (77%). Upper litter intakes and leaf fraction were observed in the dry season (March to September) in the 1 m x 1 m spacing, being the average value contributed of litter, in the range of two years, equal to 7.48 Mg.ha-1.year-1. The material contributed in the dry season, after four years of planting, showed that the amount of macronutrients (g.kg-1) N, K and Mg were little influenced by the spacing. The highest nutrient content was observed in 1 m x 1 m spacing. In General, it was found the following order as the nutrient content of litter, N > Ca > K > Mg > P. The species were assessed of macronutrient quantity in the compartments of biomass. With regard to the presence of macronutrients quantity (N; P; K; Ca; Mg) at compartments noteworthy are at leaves (2.41; 0.21; 1.29; 1.12; 0.41 g nutrient.kg sample); secondly bark; thirdly branches; fourthly root and fifth wood. It is concluded that there are differences in nutrient quantity of biomass among the six species studied, being more demanding Chorisia speciosa on nutrients, and Schinus terebinthifolius and Schizolobium parahyb less demanding. Also that the nutrient quantity followed the order leaf > bark > branch > root > wood. The macronutrient content presented the order N > K > Ca > Mg > P. / O espa?amento de plantio nos povoamentos mistos interfere nas rela??es de competi??o pelos recursos do ambiente, no controle de esp?cies indesejadas e na facilita??o da sucess?o florestal. Portanto, entre outras vari?veis, afetar? o crescimento das esp?cies, al?m da ciclagem de nutrientes na vegeta??o e consequentemente a deposi??o de serapilheira. Num plantio de restaura??o florestal, em Serop?dica, RJ foram empregados os espa?amentos 1 m x 1 m; 1,5 m x 1,5 m; 2 m x 2 m e 3 m x 2 m e seis esp?cies foram estudadas quanto ao seu crescimento durante seis anos ap?s plantio. As caracter?sticas avaliadas foram altura total (m) e di?metro ao n?vel do solo (DNS) e a ?rea de copa, visando comparar o crescimento das plantas, aos tr?s e seis anos de idade. O comportamento das esp?cies nas tr?s caracter?sticas foram diferentes, aos tr?s e seis anos, onde em geral, o espa?amento 1 m x 1m forneceu menores valores. Nos espa?amentos o aporte de material dec?duo foi estudado durante dois anos. No espa?amento 1 m x 1 m foi observada a maior deposi??o de serapilheira, n?o havendo diferen?as entre as unidades dos demais espa?amentos. A fra??o folha mostrou, em todos os espa?amentos, maior aporte de serapilheira (77%). Maiores valores de aporte de serapilheira e da fra??o folha foram observados na ?poca da seca (mar?o a setembro) no espa?amento 1 m x 1 m, sendo o valor m?dio aportado no intervalo de dois anos, igual a 7,48 Mg ha-1 . ano-1. No material aportado na ?poca da seca, ap?s quatro anos de plantio, verificaram-se os maiores teores de nutrientes N, K e Mg, sendo esse padr?o pouco influenciado pelo espa?amento. O maior conte?do de nutrientes foi observado no espa?amento 1 m x 1 m. Em geral, constatou-se a seguinte ordem quanto o conte?do de nutrientes da serapilheira, N > Ca > K > Mg > P. As esp?cies foram avaliadas quanto ao teor de macronutrientes nos compartimentos da biomassa arb?rea. Quanto aos teores dos macronutrientes por compartimentos cabe destacar os valores da fra??o foliar (24,1; 2,1; 12,9; 11,2; 4,1 g nutriente.kg-1amostra); em segundo lugar a casca; galho em terceiro lugar; em quarto lugar a raiz e em quinto a madeira. Conclui-se que existem diferen?as no teor de nutrientes da biomassa entre as seis esp?cies estudadas, sendo a paineira a mais exigente em nutrientes, e aroeira e guapuruvu, as menos exigentes. Tamb?m que o teor de nutrientes, nos compartimentos, seguiu a ordem folha > casca > galho > raiz > madeira. O teor de macronutrientes apresentou a ordem N > K > Ca > Mg > P.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:jspui/1518 |
| Date | 14 August 2012 |
| Creators | VILLA, Ester Bullich |
| Contributors | Leles, Paulo S?rgio dos Santos, Pereira, Marcos Gervasio, Leles, Paulo S?rgio do Santos, Schumacher, Mauro Valdir, Oliveira Neto, Silvio Nolasco de, Francelino, M?rcio Rocha, Melo, Lucas Amaral de |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Programa de P?s-Gradua??o em Ci?ncias Ambientais e Florestais, UFRRJ, Brasil, Instituto de Florestas |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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