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DOI	10.1016/j.foreco.2020.118170
	Quantifying losses in productivity by the rust in eucalypt plantations in Brazil
	Passos dos Santos A.; Lanças Gomes R.; Furtado E.L.; de Souza Passos J.R.
发表日期	2020
ISSN	0378-1127
卷号	468
英文摘要	The eucalyptus plantations in Brazil have been great importance in economy with 1.3% of the Gross Domestic Product, so their productivity has recently been extensively researched by the forestry. This productivity is affected by abiotic and biotic factors. Among the biotic factors we can highlight the rust, which attacks and generates large long-term losses in large scale. The aim of this paper is to measure the effect of the rust disease in eucalyptus stand by the statistical-models approach. Firstly, a new index named Rust Severity Index – RSI has been proposed. The index is a weighted average of the severity scale by the inverse of age in days. The generalized linear model has been used to model the effect of region/farm and severity of disease in maximum sample volume (m3) of the plantations. We also fit a generalized linear regression model to maximum sample volume (m3) of the plantations by the rust severity index. Finally, Gompertz nonlinear regressions models were fitted to the volume growth according to region/farm and rust severity. Then, it has been possible to measure the losses in volume (m3) due the rust severity by the percentage difference between the rust severity categories at 51st and 72nd months. © 2020 Elsevier B.V.
关键词	Forestry Regression analysis Scales (weighing instruments)Biotic factors Eucalypt plantations Eucalyptus plantations Generalized linear model Gross domestic products Linear regression models Non-linear regression Weighted averages Productivity abiotic factor biotic factor disease severity evergreen tree regression analysis rust disease Brazil Eucalyptus
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132790
推荐引用方式 GB/T 7714	Passos dos Santos A.,Lanças Gomes R.,Furtado E.L.,et al. Quantifying losses in productivity by the rust in eucalypt plantations in Brazil[J]. Forest Ecology and Management,2020,468.
APA	Passos dos Santos A.,Lanças Gomes R.,Furtado E.L.,&de Souza Passos J.R..(2020).Quantifying losses in productivity by the rust in eucalypt plantations in Brazil.,468.
MLA	Passos dos Santos A.,et al."Quantifying losses in productivity by the rust in eucalypt plantations in Brazil".468(2020).