Pérez-Cruzado, César

[["dc.bibliographiccitation.firstpage","19"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","24"],["dc.bibliographiccitation.volume","331"],["dc.contributor.author","Eimil-Fraga, Cristina"],["dc.contributor.author","Rodriguez-Soalleiro, Roque"],["dc.contributor.author","Sanchez-Rodriguez, Federico"],["dc.contributor.author","Perez-Cruzado, Cesar"],["dc.contributor.author","Alvarez-Rodriguez, Esperanza"],["dc.date.accessioned","2018-11-07T09:33:14Z"],["dc.date.available","2018-11-07T09:33:14Z"],["dc.date.issued","2014"],["dc.description.abstract","Relationships between soil properties, foliar nutrients and growth were studied in 128 plots of Pinus pinaster established in soil over different types of bedrock in Galicia (NW Spain). Plots were classified into the following groups of bedrocks according to geological maps and samples: granitic rocks, quaternary sediments, quartzite and sandstone, slates and phyllites, biotitic schists, micaschists, gneiss and migmatites. Bedrock type significantly influenced exchangeable Ca, total N, soil depth, foliar N, P, Ca, K and Mg and site index. Bedrock was also related to elevation, temperature and slope, as a result of the distribution and geomorphology. Soils developed from biotitic schists, gneiss, migmatites and granitic rocks were the most favourable for tree growth. The poorest growth and most severe nutrient deficiencies were observed in soils developed from quaternary sediments, mica schists, phyllites and slates, quartzite and sandstone. Two regression models were developed to predict site index: a complete model explained 52% of the total variation in site index, and a model for granitic rocks explained 53% of the variation. Both indicated the importance of soil depth, elevation and foliar K and Ca as predictive variables. (C) 2014 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.foreco.2014.07.024"],["dc.identifier.isi","000343844200003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31922"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1872-7042"],["dc.relation.issn","0378-1127"],["dc.title","Significance of bedrock as a site factor determining nutritional status and growth of maritime pine"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","309"],["dc.bibliographiccitation.journal","Biomass and Bioenergy"],["dc.bibliographiccitation.lastpage","320"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Oliveira, Nerea"],["dc.contributor.author","Sixto, Hortensia"],["dc.contributor.author","Canellas, Isabel"],["dc.contributor.author","Rodriguez-Soalleiro, Roque"],["dc.contributor.author","Perez-Cruzado, Cesar"],["dc.date.accessioned","2018-11-07T10:03:33Z"],["dc.date.available","2018-11-07T10:03:33Z"],["dc.date.issued","2015"],["dc.description.abstract","A Reference Diagram (RD) was constructed for first rotations of the Euroamerican poplar 'I-214' grown as short rotation coppice (SRC). Data from 144 plots, established in eleven sites in Mediterranean environments, were used to develop the model. The density at establishment of the plantations ranged between 6666 and 33,333 stools ha(-1), covering the usual densities ranges used in short rotation forestry (SRF). The RD was based on a density-independent mortality model that relates the density of living stools to the average height of dominant shoot and the initial plantation density, and it includes a system of two simultaneously fitted equations relating a) quadratic mean basal diameter of dominant shoots to the average height of dominant shoot and the final density, and b) total above-ground woody dry biomass to quadratic mean basal diameter and final density. The isolines in the RD represented mortality, quadratic mean basal diameter of dominant shoots and total above-ground woody dry biomass at the end of a first rotation of three years. The final yield in terms of biomass ranged from 1 to 85 Mg dm ha(-1). The RD enables rapid and straightforward comparison of different situations, both at planting and at harvesting, and is a useful tool, based on a wide range of empirical data, for management and decision making regarding short rotation poplar crops. (C) 2014 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.biombioe.2014.09.019"],["dc.identifier.isi","000349724100032"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38493"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","1873-2909"],["dc.relation.issn","0961-9534"],["dc.title","Productivity model and reference diagram for short rotation biomass crops of poplar grown in Mediterranean environments"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","194"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","206"],["dc.bibliographiccitation.volume","391"],["dc.contributor.author","Oliveira, Nerea"],["dc.contributor.author","Rodriguez-Soalleiro, Roque"],["dc.contributor.author","Jose Hernandez, Maria"],["dc.contributor.author","Canellas, Isabel"],["dc.contributor.author","Sixto, Hortensia"],["dc.contributor.author","Perez-Cruzado, Cesar"],["dc.date.accessioned","2018-11-07T10:24:43Z"],["dc.date.available","2018-11-07T10:24:43Z"],["dc.date.issued","2017"],["dc.description.abstract","Short Rotation Coppice (SRC) plantations are important to biomass supply in the biomass market. The biomass stocks estimations should be based on robust models that allow the most accurate estimations. We have evaluated the changes in allometry for the estimation of biomass production at individual stool level in a short rotation, high density poplar plantation under a coppice system during two rotations of three years. The plantation was established in central-northern Spain, with a density of 17,316 stools ha(-1). The influence of different factors in the allometry has been evaluated to improve the methodology for more robust biomass prediction. In an SRC system, the influence of age was more pronounced in the first year after each coppicing than in subsequent years of the cycle. Our findings suggest that this feature of nature must be accommodated in the modelling procedure either through the model formulation (decreasing the parameter variability with the inclusion of age as a dummy predictor variable) or by selecting the sample according to the stage of development of the above-ground biomass (which will depend on the goals of the predictions). The minimum sample size proposed to construct a model capable of predicting biomass regardless of age in SRC was 50 trees. Furthermore, the uncertainty was quantified in two models for total above-ground dry woody biomass, the first based only on the basal diameter and the other on the basal diameter along with the number of shoots per stool; the inclusion of the latter was advisable to increase the accuracy and reduce the mean deviation in biomass predictions at different ages. (C) 2017 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.foreco.2017.02.020"],["dc.identifier.isi","000399511500020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42709"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1872-7042"],["dc.relation.issn","0378-1127"],["dc.title","Improving biomass estimation in a Populus short rotation coppice plantation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","525"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","BioEnergy Research"],["dc.bibliographiccitation.lastpage","535"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Oliveira, Nerea"],["dc.contributor.author","Rodriguez-Soalleiro, Roque"],["dc.contributor.author","Perez-Cruzado, Cesar"],["dc.contributor.author","Canellas, Isabel"],["dc.contributor.author","Sixto, Hortensia"],["dc.date.accessioned","2018-11-07T10:23:28Z"],["dc.date.available","2018-11-07T10:23:28Z"],["dc.date.issued","2017"],["dc.description.abstract","Woody biomass is one of our main resources available to enhance the bio-economy, but its production varies considerably depending on the species, the environment and crop management. The variability associated with these crops complicates the estimation of biomass through prediction models. The specificity of environment or genotype level limits the application of many of the models, which are often developed for use at local geographical levels. Although generalizations involve some loss of accuracy, the inclusion of a wide range of data for a wide range of environments and genotypes can improve model applicability. A total of 11,265 data from short-rotation, high-density poplar plantations (from 22 sites in Spain, covering 29 genotypes belonging to 7 different taxonomic groups) were used to develop biomass prediction models under Mediterranean conditions and to test whether similarities in individual tree biomass allometry occur within the taxonomic group level. A general model and both taxonomic group- and genotype-level models were fitted using weighted nonlinear regression. The simplified model, in which only the basal diameter is included, presented the best model performance, explaining 87% of the variability. The allometric similarities among different genotypes were evaluated in order to explore the relationship between the most frequently used poplar genotypes in the Mediterranean area, and although certain groups were identified, it was not possible to relate these similarities among different genotypes to their taxonomic group affinity. This was also confirmed by comparing the performance of the general models with the taxonomic group-level models when predicting at the genotype level. Although estimates made using the general models are relatively precise, the use of genotype-level models is recommended for more accurate predictions."],["dc.identifier.doi","10.1007/s12155-017-9818-7"],["dc.identifier.isi","000400861200020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42459"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Springer"],["dc.relation.issn","1939-1242"],["dc.relation.issn","1939-1234"],["dc.title","On the Genetic Affinity of Individual Tree Biomass Allometry in Poplar Short Rotation Coppice"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]