气候变化领域集成服务门户(CCPortal): Growth and retrospective analysis of competition in an overstocked stand of Araucaria angustifolia

CCPortal

DOI	10.1016/j.foreco.2020.118766
	Growth and retrospective analysis of competition in an overstocked stand of Araucaria angustifolia
	Curto R.D.A.; Mattos P.P.D.; Braz E.M.; Péllico Netto S.
发表日期	2020
ISSN	0378-1127
英文摘要	The objective of this work was to recover growth patterns in an over-stocked stand of trees, using a stand of Araucaria angustifolia as a case study to develop an understanding of tree development over the long term. This will be useful in planning silvicultural intervention and in the management of new plantation of this species. An overstocked stand of Araucaria angustifolia (Bertol.) Kuntze was evaluated in Campo Largo, Paraná, Brazil, in the National Forest of Açungui. At the time of the study, it was 65 years old and had been through a single thinning. The area was sampled using circle plots defined by a modified Prodan method, using 46 trees in three development classes (DC) were defined as sampling plot centers: DC-1 (10 ≤ dbh < 30 cm), DC-2 (30 ≤ dbh < 50 cm) and DC-3 (50 ≤ dbh < 70 cm). Fourteen disc samples were obtained from each plot center tree and increment core samples were obtained from competing trees, totalizing in 296 trees sampled. The trees presented similar increment in the first 5 years. At 10 years the DC-3 trees presented higher growth than the others, indicating when the first thinning should be performed. The two smaller classes (DC-1 and DC-2) presented growth differentiation only after 20 years, suggesting that thinning during this period could have been successful. The DC-3 trees showed an increment greater than twice of that observed in DC-1 trees for those trees in the diametric class of 10 to 20 cm. The average increment stabilized even in the largest trees (DC-3) from 40 cm in dbh. The suggested procedure, using a competition index and dendrochronological analysis, allowed for the identification of growth patterns in overstocked stands. Analysis using dendrochronology and competition index allowed better understanding of the growth rate of an unmanaged stand. In our case study, these patterns made it possible to identify the correct period for the first thinning. These results will provide a useful basis for management of future A. angustifolia plantations. © 2020 Elsevier B.V.
英文关键词	Dendrochronology; Forest management; Growth pattern; Thinning
语种	英语
scopus关键词	Ecology; Competition index; Growth differentiation; Growth patterns; Increment core; National forests; Retrospective analysis; Forestry
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155635
作者单位	Federal Rural University of Rio de Janeiro, Rod. BR 465, KM 07, Seropédica, RJ 23890-000, Brazil; Embrapa Florestas, Estrada da Ribeira Km 111, Caixa Postal 319, Colombo, PR 83411-000, Brazil; Federal University of Paraná, Av. Pref. Lothario Meissner 900, Curitiba, PR 80210-170, Brazil
推荐引用方式 GB/T 7714	Curto R.D.A.,Mattos P.P.D.,Braz E.M.,et al. Growth and retrospective analysis of competition in an overstocked stand of Araucaria angustifolia[J],2020.
APA	Curto R.D.A.,Mattos P.P.D.,Braz E.M.,&Péllico Netto S..(2020).Growth and retrospective analysis of competition in an overstocked stand of Araucaria angustifolia.Forest Ecology and Management.
MLA	Curto R.D.A.,et al."Growth and retrospective analysis of competition in an overstocked stand of Araucaria angustifolia".Forest Ecology and Management (2020).