Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior Agrária >
Ambiente e Recursos Naturais >
ARN - Posters em Encontros Científicos Internacionais >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/4254

Título: Carbon and nutrient inputs by litterfall into three chestnut high forest stands in North Portugal
Autor: Patrício, Maria do Sameiro
Pereira, Ermelinda
Nunes, Luís
Monteiro, Maria do Loreto
Palavras-chave: Sweet chestnut
Litterfall biomass
Nutrient concentrations
Carbon
Issue Date: 2007
Citação: Patrício, Maria do Sameiro; Pereira, Ermelinda; Nunes, Luís; Monteiro, Maria do Loreto (2007) - Carbon and nutrient inputs by litterfall into three chestnut high forest stands in north Portugal. In International Workshop on Chestnut, Management in Mediterranean Countries: Problems and Prospects. Bursa
Resumo: The litterfall in three high forest chestnut stands, located in different soil types, in Bornes, Marão and Padrela, north of Portugal, with 45, 63 and 65 years old, respectively, was collected during two years in December by a quadrate method with 0.5*0.5m. To the sampling of the presented study there were collected four kinds of samples – (1) leaf litter constituted by vegetal materials resulting from the litterfall of the year; (2) leaf litter constituted by a mixture of vegetal materials in different decomposition stages; (3) soil from 0-5 cm depth and (4) soil from 5-10 cm depth. The litter of the year was separated into the fractions leaves, branches, fruits and fruit cases. The fractions were dried at 70ºC, weighted and the concentrations of N, P, K, Ca, Mg, S, B e C were measured. The total amount of litter in the three chestnut stands was 8.3, 7.7 and 12.4 Mg ha-1, respectively. Leaves are the main constituents of the total litter with 54, 62 and 50 %, respectively. The proportion of the other litter fractions varies between 10 and 19 % for the hedgehogs, 20 and 32 % for the branches and 4 and 10 % for the fruits. Regarding the concentration of the nutrients in the litter fractions, in general, leaves are rich in N>Ca>Mg>K>P>S; fruits are rich in N>K>Mg>Ca>P>S. In branches, the N and Ca concentration dominate by far and the fruit cases are rich in N and K. The return of nutrients by litterfall is relevant: it varies between 57 and 141.6 kg ha-1 year-1 for N, 5 and 10 kg ha-1 year-1 for P, 13 and 45 kg ha-1 year-1 for K, 28 and 65 kg ha-1 year-1 for Ca, 18 and 34 kg ha-1 year-1 for Mg, 2 and 8 kg ha-1 year-1 for S, 87 and 117 g ha-1 year-1 for B. The carbon in the litterfall varies between 4 and 6.3 Mg ha-1 year-1. It was verified that the biomass nutrients concentrations is strongly dependent of the soil like suggest some authors.
Arbitragem científica: no
URI: http://hdl.handle.net/10198/4254
Appears in Collections:ARN - Posters em Encontros Científicos Internacionais

Files in This Item:

File Description SizeFormat
poster_Carbon and nutrient inputs by litterfall.pdf294,3 kBAdobe PDFView/Open

Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 


  © Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
  Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE