Influence of vegetation management and fertilization on Pinus pinaster growth and on understory biomass and composition
Abstract
To study the influence of understory vegetation management and fertilization, on pine growth and competing vegetation, a field trial was established in a 6-year old pine forest. Treatments included: control (C), vegetation cutting and removal, with and without fertilization (CRF and CR treatments), vegetation chipping, with and without fertilization (CDF and CD treatments). Treatments were replicate three times and arranged in completely randomized blocks. Pine volume was determined between 2002 and 2007 and understory was surveyed, quantified and analysed for macronutrients in 2002 and 2003. Vegetation chipping plus fertilization lead to the largest (p < 0.05) increase in pine volume (9.6 m3 ha–1 year–1) while removal of understory resulted in the lowest (p < 0.05), 5.1 m3 ha–1 year–1. In the other treatments, the average increase in volume was similar (6.4 m3 ha–1 year–1). When understory was removed nutrient output was rather large, especially the N output since Ulex minor was in 2002 the dominant species (65%). CD treatment was the most effective in reducing understory biomass (–76%), followed by CR (–65%), CDF (–57%) and CRF (–46%) treatments. In Control, vegetation biomass increased 48%. These results indicate that removal of understory without fertilizer addition is not a suitable practice. Chipping of vegetation besides avoiding nutrient output, decreased the amount of fuel, hence decreases fire risk, and if used with fertilizers leads to a significant increase in pine growth.Downloads
References
Albaugh T.J., Allen H.L., Zutter B.R., Quicke H.E., 2003. Vegetation control and fertilization in midrotation Pinus taeda stands in the southeastern United States. Ann For Sci 60, 619-624. http://dx.doi.org/10.1051/forest:2003054
Alves E.S., 1998. Avaliação da qualidade das estações florestais a partir de propriedades físicas do solo. Povoamentos de pinheiro bravo no vale do Tâmega. Master thesis. UTAD, Vila Real, Portugal. [In Portuguese].
Borders B.E., Will R.E., Markewitz D., Clark A., Hendrick R., Teskey O., Zhang Y., 2004. Effect of complete competition control and annual fertilization on stem growth and canopy relations for a chronosequence of loblolly pine plantations in the lower coastal plain of Georgia. Forest Ecology and Managemen 192, 21-37. http://dx.doi.org/10.1016/j.foreco.2004.01.003
Burgess D., Baldock S., Wetzell S., Brand D.G., 1995. Scarification, fertilization and herbicide treatment effects on planted confers and soil fertility. Plant and Soil 168-169, 513-522. http://dx.doi.org/10.1007/BF00029364
Cain M.D., 1991. The influence of woody and herbaceous competition on early growth of naturally regenerated loblolly and shortleaf pines. Southern J App Forestry 15(4), 179-185.
Carneiro M., Fabião A., Martins M.C., Fabião A., Silva M.A., Hilário H., Lousã M., Madeira M., 2007. Effects of harrowing and fertilization on understory vegetation and timber production on a Eucalyptus globulus Labill. plantation in central Portugal Forest Ecology and Management. doi: 10.1016/j.foreco.2007.09.028. http://dx.doi.org/10.1016/j.foreco.2007.09.028
DGRF, 2007. Resultados do inventário florestal nacional 2005/06. Lisboa, Portugal.
Fernandes P.A.M., Loureiro C.A., Botelho H.S., 2004. Fire behaviour and severity in a maritime pine stand under differing fuel conditions. Ann For Sci 61, 537-544. http://dx.doi.org/10.1051/forest:2004048
Kent M., Coker P., 1992. Vegetation description and analysis. A practical approach. Belhaven press, London.
Marques C.A.P., 1987. Qualidade das estações florestais. Povoamentos do pinheiro bravo no vale do Tâmega. Doctoral thesis. UTAD, Vila Real, Portugal. [In Portuguese].
Martin T.A., Jokela E.J., 2004. Stand development and production dynamics of loblolly pine under a range of cultural treatments in north-central Florida, USA. Forest Ecology and Management 192, 39-58. http://dx.doi.org/10.1016/j.foreco.2004.01.004
Matsushima M., Chang S.X., 2007. Effects of understory removal, N fertilization, and litter layer removal on N cycling in a 13-year old white spruce plantation infested with Canada bluejoint grass. Plant and Soil 292, 243-258. http://dx.doi.org/10.1007/s11104-007-9220-x
Miller J.H., Zutter B.R., Zedaker S.M., Edwards M.B., Newhold A., 1995. Early plant succession in loblolly pine plantations as affected by vegetation management. Southern J App Forestry 19(3), 109-126.
Oliveira A.L.F., 1959. A fertilização em silvicultura. In: Curso livre de silvicultura. ISA. DGFA, Lisboa, Portugal.
Pritchett W.L., Fisher R.F., 1987. Properties and management of forest soils, 2nd ed. New York, John Wiley & Sons. PMCid:298899
Powers F.P., Reynolds P.E., 1999. Ten-year responses of ponderosa pine plantation to repeated vegetation and nutrient control along an environmental gradient. Can J For Res 29, 1027-1038. http://dx.doi.org/10.1139/x99-104
Rose R., Ketchum J.S., 2002. Interaction of vegetation control and fertilization on conifer species across the Pacific Northwest. Can J For Res 32, 136-152. http://dx.doi.org/10.1139/x01-180
Savill P., Evans J., Auclair D., Falck F., 1997. Plantation Silviculture in Europe. Oxford University Press, Oxford.
Tisdale S., Nelson W., Beaton J., Havlin J.L., 1998. Soil fertility and fertilizers: an introduction to nutrient managemen, 6ª ed. New Jersey, Prentice Hall.
Xavier R., 2008. Efeito do controlo do sob coberto e da fertilização no crescimento de pinheiro bravo. Master thesis. UTAD, Vila Real, Portugal. [In Portuguese].
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