Data/hora: 11/06/2024 17:31:12

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 25/09/2008
Data da última atualização: | 25/09/2008
Autoria: | LAZCANO, C.; SAMPEDRO, L.; ZAS, R.; DOMÍNGUEZ, J.
Título: | Vermicompost in forest nursery: effects of different doses on the growth of pine seedlings (Pinus pinaster) and the role of plant genotype.
Ano de publicação: | 2008
Fonte/Imprenta: | In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
Idioma: | Inglês

Conteúdo:

Vermicompost has shown to enhance plant growth in several horticultural and ornamental species.
However, little is known about its suitability as organic amendment into the potting media of
forestry species; vermicompost might be considered in forest nursery as a mean to reduce
fertilizer expenses and the impact of the exploitation of highly valuable and non-renewable
materials such as peat. We investigated how different doses of vermicompost incorporated
into the potting media influenced the growth of different progenies of pine seedlings (Pinus
pinaster). Seeds with different genotypes belonging to five open-pollinated families of P. pinaster
selected for superior growth stem form and branch characteristics were collected from an
experimental orchard in Sergude (Galicia, NW Spain). Additionally a commercial mixture of
seeds from different progenies was included for comparison. Five seeds belonging to the same
family were sown in 4 L plastic pots. The basic potting mixture consisted on peat and perlite (1:1
v:v) where the following treatments where applied: (i) 2.5 % substitution of peat by vermicompost;
(ii) 5% substitution of peat by vermicompost; (iii) 10% substitution of peat by vermicompost; (iv)
25% substitution of peat by vermicompost; (v) vermicompost tea, in a dose equivalent to 2.5%
of peat substitution by vermicompost; (vi) vermicompost tea in a dose equivalent to 25% of peat
substitution by vermicompost. A slow-release mineral fertilizer was added to all the treatments
and controls to avoid nutrient limitations. Pots were located in a greenhouse with controlled
temperature and moisture following a randomized block design. After 20 weeks, the pine
seedlings where harvested and their growth was assessed by measuring shoot height and
diameter and biomass of shoots, leaves, and roots. The early ontogenic development of the
plants was evaluated through the number of lateral branches and the amount of mature needles
formed. The results of this experiment provide one of the first approaches to the use of
vermicompost as pot amendment in forest nursery as well as a clue for a better management of
this kind of organic amendments by studying their interaction with the genotype of the plants.

Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (43724-1) - UPE - PL - -- - CD0305 -  -  - DIS