Modelling growth responses of juvenile radiata pine (Pinus radiata D. Don) clones subjected to different weed competition levels in Canterbury, New Zealand
2000
Bekuta, Balozi Kirongo | Dr. Mason, Euan G. (Supervisor) | Prof. Sands, Roger (Head, School of Forestry)
Growth responses of juvenile radiata pine (Pinus radiata) clones to variable weeding microenvironments during the first 3 years after out-planting were evaluated during this study. The study was established in a dry site on the Canterbury plains of the South Island of New Zealand. One of the significant findings from this study was the strong evidence against the constant Relative Growth Rate (RGR) model, which has been used by many researchers of tree growth analysis. The results further demonstrated that trees growing with weeds were predisposed to perform poorly due to reduced canopy production as well as having higher proportions of older, less efficient foliage. The results of this study lay the framework to explicitly quantify clonal responses to resource deficits arising from management inputs using variables directly involved in canopy production (i.e. leaf area).
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