Eleventh International Conference on Climate Change: Impacts & Responses

Abstract

Maritime pine seeds from the Meseta Castellana provenance were germinated in laboratory and grown in different nursery conditions of light and Nitrogen availability. The seedlings were transplanted and grown with watering/ non-watering to simulating summer rainfall in the same locality of the seeds source for several years. The objectives of our study were: to identify the most important factors affecting sapling survival in field; to analyse the effect of climate factors on biomass production and partitioning; to compare different methods for biomass estimation; and to analyse the effect of climate factors on the annual basal diameter growth. We led four inventories for measuring biometric variables and counting survival in field. The final harvest was done to estimate biomass and basal diameter growth in the laboratory. A set of equations were fitted to consistent estimation of biomass, and the best models for each biomass components were fitted simultaneously according to seemingly unrelated regression (SUR) method. The Dirichlet method was applied to estimation of the proportion of each biomass components. The cox and linear regression model were applied for survival and estimation of diameter growth, respectively. Our result found the rainfall in summer associate light and without light governed of survival and diameter growth of Maritime pine, respectively. Our result revealed the SUR method was better compared to Dirichlet methods for estimation of component biomass. Our results will helpful to establishing of forest management strategies from nursery products in the field condition, and to choosing the best methodologies to estimation of biomass.