Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.17
Thiago Wendling Gonçalves de Oliveira, A. Higa, L. D. Silva
This study aimed to optimize the genetic gain for initial growth, low rust infection, and wood quality in an open pollination progeny test of E. grandis. The progeny test was established in Anhembi-SP, in a randomized block design, with 176 progenies, single tree plots, 29 replications, and one external borderline. Three evaluations were carried out. For the variable related to growth, diameter at breast height (DBH); evaluation at 20 months of age; for the degree of rust infection (DRI) the evaluations were carried out at 9 months of age, and for wood quality the variable number of branches (NB) was evaluated at 14 months. The choice of these variables considered the estimates of heritability and genetic correlations. Eight selection methods were used to optimize genetic gains for each variable, such as indirect selection, independent levels, and combined selection indexes with equal and different weights for each variable. The breeding strategies were based on the formation of Seedling Seed Orchards (SSO) and Clonal Seed Orchards (CSO). Based on the results, the indirect selection was not recommended because genetic correlations between DBH, DRI, and NB were weak (< 0.50), and it was necessary to consider the three variables for the construction of selection indexes and independent levels. For both breeding strategies the independent selection levels were the best in optimizing simultaneous selection for growth, rust resistance, and wood quality; with gains for DBH, DRI, and NB of 5.83%, 13.88%, and 4.12%, respectively for the formation of SSOs; while gains of 7.23%, 18.76%, and 6.72% were calculated respectively for the formation of CSOs.
{"title":"Optimization of genetic gain in different variables for Eucalyptus grandis Hill ex Maiden breeding","authors":"Thiago Wendling Gonçalves de Oliveira, A. Higa, L. D. Silva","doi":"10.18671/scifor.v49n132.17","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.17","url":null,"abstract":"This study aimed to optimize the genetic gain for initial growth, low rust infection, and wood quality in an open pollination progeny test of E. grandis. The progeny test was established in Anhembi-SP, in a randomized block design, with 176 progenies, single tree plots, 29 replications, and one external borderline. Three evaluations were carried out. For the variable related to growth, diameter at breast height (DBH); evaluation at 20 months of age; for the degree of rust infection (DRI) the evaluations were carried out at 9 months of age, and for wood quality the variable number of branches (NB) was evaluated at 14 months. The choice of these variables considered the estimates of heritability and genetic correlations. Eight selection methods were used to optimize genetic gains for each variable, such as indirect selection, independent levels, and combined selection indexes with equal and different weights for each variable. The breeding strategies were based on the formation of Seedling Seed Orchards (SSO) and Clonal Seed Orchards (CSO). Based on the results, the indirect selection was not recommended because genetic correlations between DBH, DRI, and NB were weak (< 0.50), and it was necessary to consider the three variables for the construction of selection indexes and independent levels. For both breeding strategies the independent selection levels were the best in optimizing simultaneous selection for growth, rust resistance, and wood quality; with gains for DBH, DRI, and NB of 5.83%, 13.88%, and 4.12%, respectively for the formation of SSOs; while gains of 7.23%, 18.76%, and 6.72% were calculated respectively for the formation of CSOs.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77245822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.05
D. Vieira, Pedro Henrique Fernandes Silva, Renan Augusto Miranda Matias, M. B. X. Valadão, Thalles Oliveira Martins, F. Ribeiro, J. R. Pinto, A. Gatto
{"title":"Forest species in ecological restoration of Cerrado vegetation","authors":"D. Vieira, Pedro Henrique Fernandes Silva, Renan Augusto Miranda Matias, M. B. X. Valadão, Thalles Oliveira Martins, F. Ribeiro, J. R. Pinto, A. Gatto","doi":"10.18671/scifor.v49n132.05","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.05","url":null,"abstract":"","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78724814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.16
M. Moslehi, T. Pypker, Asghar Bijani, A. Ahmadi, Mohammad Hossien Sadeghzade Hallaj
We selected six months old seedlings of Rhizophora mucronata (Lam.) to evaluate the effect of different salinity on seedling growth, biomass and ion content in roots and leaves. We planted red mangrove propagules in plastic pots and irrigated them with freshwater (control), low salinity (EC: 8500 μm.cm; 25% sea water+75% freshwater), moderate salinity (EC: 29000 μm.cm; 50% sea water+50% freshwater) and high salinity (EC: 57000 μm.cm; 100% sea water) for six months. Seedling grown at moderate salinity, had higher leaf number, collar diameter, height, root length, root dry weight, total dry mass weight and leaf area relative to seedlings grown at lower or higher concentrations. Concentrations of sodium and chloride ions in both leaves and roots increased with increasing salinity. Calcium, potassium and nitrogen in both leaves and roots were highest in the moderate treatment, followed by control, low salinity and high salinity treatments. All ions were higher in leaves, except for calcium, which was higher in roots. It can be concluded that the moderate salinity levels as it balances seedling quality with reduced demand for freshwater.
{"title":"Effect of salinity on the vegetative characteristics, biomass and chemical content of red mangrove seedlings in the south of Iran","authors":"M. Moslehi, T. Pypker, Asghar Bijani, A. Ahmadi, Mohammad Hossien Sadeghzade Hallaj","doi":"10.18671/scifor.v49n132.16","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.16","url":null,"abstract":"We selected six months old seedlings of Rhizophora mucronata (Lam.) to evaluate the effect of different salinity on seedling growth, biomass and ion content in roots and leaves. We planted red mangrove propagules in plastic pots and irrigated them with freshwater (control), low salinity (EC: 8500 μm.cm; 25% sea water+75% freshwater), moderate salinity (EC: 29000 μm.cm; 50% sea water+50% freshwater) and high salinity (EC: 57000 μm.cm; 100% sea water) for six months. Seedling grown at moderate salinity, had higher leaf number, collar diameter, height, root length, root dry weight, total dry mass weight and leaf area relative to seedlings grown at lower or higher concentrations. Concentrations of sodium and chloride ions in both leaves and roots increased with increasing salinity. Calcium, potassium and nitrogen in both leaves and roots were highest in the moderate treatment, followed by control, low salinity and high salinity treatments. All ions were higher in leaves, except for calcium, which was higher in roots. It can be concluded that the moderate salinity levels as it balances seedling quality with reduced demand for freshwater.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88799711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.19
T. Pimentel, Peter Wimmer, Helder Resende de Carvalho, Luciano Roitman, C. Menezzi
{"title":"Resistência ao cisalhamento da linha de cola em madeiras tropicais amazônicas","authors":"T. Pimentel, Peter Wimmer, Helder Resende de Carvalho, Luciano Roitman, C. Menezzi","doi":"10.18671/scifor.v49n132.19","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.19","url":null,"abstract":"","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77814534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.13
A. C. Santos, J. L. Freitas, Francisco de Oliveira Cruz Junior
This study aimed to identify the occurrence of natural populations of açaí palms in the low-land forest at Araguari River; to map the native açaí palm areas; to assess the structure of the açaí areas; to quantify the clumps of açaí palm trees and to estimate the fruit production. The study was conducted in the Araguari River Valley, state of Amapá, eastern Amazon, Brazil, covering the municipalities of Ferreira Gomes and Cutias, over a 68 km extension. For the sampling of the açaí palm area, we established 89 (10 m x 20 m) sampling plots, totaling a sample area of 1.78 ha. To measure the height and diameter of the palm trees, only palms with circumference at breast height (CBH) ≥ 20 cm were considered. The quantification of açaí fruits production was obtained through information provided by the owners who commercialize the fruit in the region. It was found that the açaí palm tree is present in the entire plantphysiognomy of the studied area. The high density and the high number of palms per clump shows that the açaí area is native and not managed. The average height of 16 m of the açaí palm indicates a need to reduce the dominant height of the palm trees in these places. The low estimate of açaí palm tree fruit production led us to conclude that the native açaí palm area of the Araguari River valley are of low production, although the areas are densely populated with açaí palm trees.
本研究旨在查明在阿拉瓜里河低地森林中açaí棕榈自然种群的发生情况;绘制原生açaí棕榈区;评估açaí区域的结构;量化açaí棕榈树的丛数并估计其果实产量。这项研究是在巴西亚马逊东部阿马ap州的阿拉瓜里河谷进行的，覆盖了费雷拉戈梅斯和库提亚斯市，延伸68公里。对于açaí棕榈区域的采样，我们建立了89个(10 m x 20 m)采样地块，总采样面积为1.78 ha。测量棕榈树的高度和直径时，只考虑胸围≥20 cm的棕榈树。通过在该地区将水果商业化的所有者提供的信息，获得了açaí水果产量的量化。研究发现，açaí棕榈树在研究区域的整个植物地貌中都存在。高密度和每丛棕榈树的高数量表明açaí地区是原生的，没有管理。açaí棕榈树的平均高度为16米，这表明需要降低这些地方棕榈树的优势高度。对açaí棕榈树果实产量的低估计使我们得出结论，阿拉瓜里河流域的原生açaí棕榈区产量很低，尽管该地区密集种植着açaí棕榈树。
{"title":"Mapping of natural populations of Euterpe oleracea Mart., structure and estimates of fruit production at Araguari River, Eastern Amazon","authors":"A. C. Santos, J. L. Freitas, Francisco de Oliveira Cruz Junior","doi":"10.18671/scifor.v49n132.13","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.13","url":null,"abstract":"This study aimed to identify the occurrence of natural populations of açaí palms in the low-land forest at Araguari River; to map the native açaí palm areas; to assess the structure of the açaí areas; to quantify the clumps of açaí palm trees and to estimate the fruit production. The study was conducted in the Araguari River Valley, state of Amapá, eastern Amazon, Brazil, covering the municipalities of Ferreira Gomes and Cutias, over a 68 km extension. For the sampling of the açaí palm area, we established 89 (10 m x 20 m) sampling plots, totaling a sample area of 1.78 ha. To measure the height and diameter of the palm trees, only palms with circumference at breast height (CBH) ≥ 20 cm were considered. The quantification of açaí fruits production was obtained through information provided by the owners who commercialize the fruit in the region. It was found that the açaí palm tree is present in the entire plantphysiognomy of the studied area. The high density and the high number of palms per clump shows that the açaí area is native and not managed. The average height of 16 m of the açaí palm indicates a need to reduce the dominant height of the palm trees in these places. The low estimate of açaí palm tree fruit production led us to conclude that the native açaí palm area of the Araguari River valley are of low production, although the areas are densely populated with açaí palm trees.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78205627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.07
Ingridh Medeiros Simões, J. Lopes, E. R. Schmildt, Adésio Ferreira, Julcinara Oliveira Baptista, C. P. D. Araujo, Thuanny Lins Monteiro Rosa, Genilda Canuto Amaral, R. S. Alexandre
Urban afforestation is done with trees with adequate size for streets, squares and avenues, as well as those with showy canopies. Trees of the genus Handroanthus and belonging to the family Bignoniaceae are widely used due to their canopies flowering in different colors used for landscape purposes. The use of techniques such as grafting, which assist in early flowering and the possibility of canopies producing flowers of different colors can be of importance. This study aimed to analyze the grafting compatibility in bifurcated seedlings of the genus Handroanthus for the production of multi-colored flowering canopies. The experiment was constituted by 10 treatments, with different scion/rootstock combinations. The studied species were Handroanthus heptaphyllus (Hh), Handroanthus impetiginosus (Hi), Handroanthus chrysotrichus (Hc), and Handronthus roseo-albus (Hr-a), using Hi as the only rootstock species (via seeds), and the remaining species, including Hi from adult plants as scions. Single-stem wedge grafting on a bifurcated seedling was adopted for the following combinations: 1. Hc/Hi; 2. Hr-a/Hi; 3. Hh/Hi; 4. Hi/Hi, whereas double-stem wedge grafting was adopted for: 5. Hi/Hi and Hc/Hi; 6. Hi/Hi and Hr-a/Hi; 7. Hi/Hi and Hh/Hi; 8. Hc/Hi and Hr-a/Hi; 9. Hc/Hi and Hh/Hi; and 10. Hr-a/Hi and Hh/Hi), with three replications of five seedlings. The take percentage and vigor were evaluated 50 days after grafting. The highest establishment rates for the single-stem wedge grafting were obtained by the same species grafts Hi/Hi (80%) and by the Hr-a/Hi (86.6%) combination; whereas for the double-stem grafting the following percentages of combinations were obtained: Hc/Hi (93.3%) and Hr-a/Hi (93.3%); Hc/Hi (73.3%) and Hh/Hi (86.6%); and Hr-a/Hi (86.6%) and Hh/Hi (86.6%).
{"title":"Grafting between species of the genus Handroanthus for the production of multi-colored flower canopies","authors":"Ingridh Medeiros Simões, J. Lopes, E. R. Schmildt, Adésio Ferreira, Julcinara Oliveira Baptista, C. P. D. Araujo, Thuanny Lins Monteiro Rosa, Genilda Canuto Amaral, R. S. Alexandre","doi":"10.18671/scifor.v49n132.07","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.07","url":null,"abstract":"Urban afforestation is done with trees with adequate size for streets, squares and avenues, as well as those with showy canopies. Trees of the genus Handroanthus and belonging to the family Bignoniaceae are widely used due to their canopies flowering in different colors used for landscape purposes. The use of techniques such as grafting, which assist in early flowering and the possibility of canopies producing flowers of different colors can be of importance. This study aimed to analyze the grafting compatibility in bifurcated seedlings of the genus Handroanthus for the production of multi-colored flowering canopies. The experiment was constituted by 10 treatments, with different scion/rootstock combinations. The studied species were Handroanthus heptaphyllus (Hh), Handroanthus impetiginosus (Hi), Handroanthus chrysotrichus (Hc), and Handronthus roseo-albus (Hr-a), using Hi as the only rootstock species (via seeds), and the remaining species, including Hi from adult plants as scions. Single-stem wedge grafting on a bifurcated seedling was adopted for the following combinations: 1. Hc/Hi; 2. Hr-a/Hi; 3. Hh/Hi; 4. Hi/Hi, whereas double-stem wedge grafting was adopted for: 5. Hi/Hi and Hc/Hi; 6. Hi/Hi and Hr-a/Hi; 7. Hi/Hi and Hh/Hi; 8. Hc/Hi and Hr-a/Hi; 9. Hc/Hi and Hh/Hi; and 10. Hr-a/Hi and Hh/Hi), with three replications of five seedlings. The take percentage and vigor were evaluated 50 days after grafting. The highest establishment rates for the single-stem wedge grafting were obtained by the same species grafts Hi/Hi (80%) and by the Hr-a/Hi (86.6%) combination; whereas for the double-stem grafting the following percentages of combinations were obtained: Hc/Hi (93.3%) and Hr-a/Hi (93.3%); Hc/Hi (73.3%) and Hh/Hi (86.6%); and Hr-a/Hi (86.6%) and Hh/Hi (86.6%).","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88992315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.12
Jean Fernando Silva Gil, M. G. D. Silva, Danilo Simões
{"title":"Restauração de uma mata ciliar: análise da produtividade efetiva das operações sob condições de incertezas","authors":"Jean Fernando Silva Gil, M. G. D. Silva, Danilo Simões","doi":"10.18671/scifor.v49n132.12","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.12","url":null,"abstract":"","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80185510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.01
Gustavo Faggiani Tomio, Alexsandro Bayestorff da Cunha, M. A. Brand, Ulisses de Arruda Córdova
{"title":"Rendimento e qualidade da madeira de Eucalyptus benthamii Maiden et Cambage de rotação longa no processo de desdobro","authors":"Gustavo Faggiani Tomio, Alexsandro Bayestorff da Cunha, M. A. Brand, Ulisses de Arruda Córdova","doi":"10.18671/scifor.v49n132.01","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.01","url":null,"abstract":"","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90209505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.18671/scifor.v49n132.08
Jonas Elias Castro da Rocha, Marlon Roque Nogueira Junior, Ivaldo da Silva Tavares Júnior, Jianne Rafaela Mazzini de Souza, Lucas Sérgio de Sousa Lopes, Márcio Lopes da Silva
This study explores algorithms and functions of activation of artificial neural networks (ANNs) to predict the total height of Eucalyptus spp. The objective was to recommend the best RNA configurations for this variable. The data came from 2,888 trees. The trained ANNs presented DBH, clone, age, age class and diametric class as input variables. The total height was the output variable. Five algorithms and six activation functions were combined in the hidden and output layers, totaling 18,125 trained ANNs. ANNs were evaluated using linear correlation ( ŷy r ), square root of the average error (RMSE%), bias and histograms of ŷy r and RMSE%. The trained ANNs obtained RMSE% ranging from 0.07% to 396.3% and ŷy r of -0.7130 to 0.9998. The ANNs was performed using the Neuro 4.0.6 software. With the exception of ANN with the Manhattan Update Rule algorithm, the best ANN selected in the validation showed a Configuração de redes neurais artificiais para relação hipsométrica de árvores de Eucalyptus spp. Scientia Forestalis, 49(132), e3706, 2021 2/11 correlation above 0.97, and RMSE% and bias close to zero. The Backpropagation, Resilient Propagation, Scaled Conjugate Gradient and Quick Propagation algorithms presented satisfactory results in height modeling. The logistic and log activation functions are efficient for the hidden and output layers, respectively. In validation, the 12-10-1 network architecture with a Resilient Propagation algorithm showed the highest precision, with RMSE of 0.067 m. On the other hand, the architecture 12-14-1 with the Manhattan Update Rule algorithm resulted in the lowest precision, with RMSE of 3.13 m. The 12-10-1 network architecture, with Resilient Propagation algorithm and logistical activation function, can be used in the training for the prediction of the total height of Eucalyptus spp.
本研究探讨了人工神经网络(ANNs)的激活算法和功能，以预测桉树的总高度，目的是为该变量推荐最佳的RNA配置。数据来自2888棵树。训练后的人工神经网络将胸径、克隆、年龄、年龄类别和直径类别作为输入变量。总高度是输出变量。在隐藏层和输出层结合了5种算法和6种激活函数，总共训练了18125个人工神经网络。采用线性相关(ŷy r)、平均误差的平方根(RMSE%)、偏差和ŷy r和RMSE%的直方图对人工神经网络进行评估。经过训练的ann得到的RMSE%范围为0.07% ~ 396.3%，ŷy r为-0.7130 ~ 0.9998。神经网络采用Neuro 4.0.6软件进行。除使用曼哈顿更新规则算法的人工神经网络外，验证中选择的最佳人工神经网络的configura o de redes neurais artificiais para rela o hipsomsamtrica de árvores de Eucalyptus spp.林业科学，49(132)，e3706, 2021 2/11相关性大于0.97,RMSE%和偏差接近于零。反向传播算法、弹性传播算法、缩放共轭梯度算法和快速传播算法在高度建模中取得了满意的结果。逻辑激活函数和日志激活函数分别对隐藏层和输出层有效。在验证中，采用弹性传播算法的12-10-1网络结构精度最高，RMSE为0.067 m。另一方面，采用曼哈顿更新规则算法的12-14-1结构精度最低，RMSE为3.13 m。采用具有弹性传播算法和逻辑激活函数的12-10-1网络结构，可用于桉树总高度预测的训练。
{"title":"Configuração de redes neurais artificiais para relação hipsométrica de árvores de Eucalyptus spp.","authors":"Jonas Elias Castro da Rocha, Marlon Roque Nogueira Junior, Ivaldo da Silva Tavares Júnior, Jianne Rafaela Mazzini de Souza, Lucas Sérgio de Sousa Lopes, Márcio Lopes da Silva","doi":"10.18671/scifor.v49n132.08","DOIUrl":"https://doi.org/10.18671/scifor.v49n132.08","url":null,"abstract":"This study explores algorithms and functions of activation of artificial neural networks (ANNs) to predict the total height of Eucalyptus spp. The objective was to recommend the best RNA configurations for this variable. The data came from 2,888 trees. The trained ANNs presented DBH, clone, age, age class and diametric class as input variables. The total height was the output variable. Five algorithms and six activation functions were combined in the hidden and output layers, totaling 18,125 trained ANNs. ANNs were evaluated using linear correlation ( ŷy r ), square root of the average error (RMSE%), bias and histograms of ŷy r and RMSE%. The trained ANNs obtained RMSE% ranging from 0.07% to 396.3% and ŷy r of -0.7130 to 0.9998. The ANNs was performed using the Neuro 4.0.6 software. With the exception of ANN with the Manhattan Update Rule algorithm, the best ANN selected in the validation showed a Configuração de redes neurais artificiais para relação hipsométrica de árvores de Eucalyptus spp. Scientia Forestalis, 49(132), e3706, 2021 2/11 correlation above 0.97, and RMSE% and bias close to zero. The Backpropagation, Resilient Propagation, Scaled Conjugate Gradient and Quick Propagation algorithms presented satisfactory results in height modeling. The logistic and log activation functions are efficient for the hidden and output layers, respectively. In validation, the 12-10-1 network architecture with a Resilient Propagation algorithm showed the highest precision, with RMSE of 0.067 m. On the other hand, the architecture 12-14-1 with the Manhattan Update Rule algorithm resulted in the lowest precision, with RMSE of 3.13 m. The 12-10-1 network architecture, with Resilient Propagation algorithm and logistical activation function, can be used in the training for the prediction of the total height of Eucalyptus spp.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85053772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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