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A model of the juvenile growth and survival of Pinus radiata D. Don; Adding the effects of initial seedling diameter and plant handling

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Abstract

Initial ground line diameter (GLD) of Pinus radiata D.Don and the care of treesduring transport to the field growing siteaffect subsequent tree growth and survival. Anexisting model of juvenile growth had notincluded these effects, and so a new model wascreated that represented their effects ongrowth, survival and uniformity. The new modelwas built with cohorts defined by each initialGLD class and with quality of tree stockhandling as an extra independent variable,using data from 17 experiments. Weibulldistributions representing the size classesdeveloping within each cohort enabled the modelto represent interchanges in dominance, andadded to the range of questions that could beanswered using the model. Reducing quality ofhandling and reducing initial GLD decreasedgrowth, survival, and crop uniformity. Changesin small GLDs were more important than changesin large ones. The final model represented theeffects of initial ground line diameter, treestock handling (careful, timely plantingcompared to rough, poorly scheduled planting),site quality, and site preparation on growth ofradiata pine in the central North Island of NewZealand in a way that allows managers toevaluate the impacts of seedling grading.

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Mason, E. A model of the juvenile growth and survival of Pinus radiata D. Don; Adding the effects of initial seedling diameter and plant handling. New Forests 22, 133–158 (2001). https://doi.org/10.1023/A:1012393130118

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  • DOI: https://doi.org/10.1023/A:1012393130118

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