Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling

Abstract. Wasli ME, Ambun DB, Kalu M, Sidi M, Nahrawi H, Elias H. 2020. Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling. Biodiversitas 21: 1880-1889. This study was conducted to evaluate the growth performance of...

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Autores principales:	Mohd Effendi Wasli, Douglas Bungan Ambun, Meekiong Kalu, Mogeret Sidi, Hafsah Nahrawi, Hashimah Elias
Formato:	article
Lenguaje:	EN
Publicado:	MBI & UNS Solo 2020
Materias:	dryobalanops beccarii, growth performance, reforestation, selective girdling Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/c84a36ab6b264a18bd6f4e108f5e668a
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spelling	oai:doaj.org-article:c84a36ab6b264a18bd6f4e108f5e668a2021-11-22T00:35:33ZAssessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling1412-033X2085-472210.13057/biodiv/d210514https://doaj.org/article/c84a36ab6b264a18bd6f4e108f5e668a2020-04-01T00:00:00Zhttps://smujo.id/biodiv/article/view/5236https://doaj.org/toc/1412-033Xhttps://doaj.org/toc/2085-4722Abstract. Wasli ME, Ambun DB, Kalu M, Sidi M, Nahrawi H, Elias H. 2020. Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling. Biodiversitas 21: 1880-1889. This study was conducted to evaluate the growth performance of planted Dryobalanops beccarii Dyer at reforestation sites after silvicultural practices in Gunung Apeng National Park (GANP), Sarawak. The assessed area was planted with D. beccarii in 2005 and undergo silvicultural treatment by understory clearing which implemented annually. Due to the suppressed growth rate of the planted trees, an additional silvicultural treatment, the selective girdling on selected pioneer species, was implemented once, in 2012. In this study, study plots with two treatments were established: T1: understory clearing only (control plot), and T2: additional selective girdling of existing pioneer species in addition to the understory clearing practice applied in T1. The growth performance of the planted D. beccarii in terms of DBH, height, survival and mean annual increments in diameter (MaiD) and height (MaiH) were assessed and monitored at the initial stage when the selective girdling treatment was applied and 4, 24, 36, 48, 60 and 72 months after girdling. Our findings showed that the survival rates of planted trees at 72 months under treatments T1 and T2 were 82.9% and 79.2%, respectively. The average tree DBH in T2 was significantly higher than that in T1, and the average tree DBH values for T1 and T2 were 7.5 cm and 9.4 cm, respectively. The average tree heights for T1 and T2 were 8.3 m and 9.2 m, respectively. In terms of the mean annual increments in height (MaiH) and diameter (MaiD), those in T2 were significantly higher than those in T1. Our findings indicated that T2 started to show better growth performance than T1 after a period of 36 months. In conclusion, the additional silvicultural treatment by selective girdling at the reforestation site had a long-term, progressive effect on the growth performance of the planted trees.Mohd Effendi WasliDouglas Bungan AmbunMeekiong KaluMogeret SidiHafsah NahrawiHashimah EliasMBI & UNS Soloarticledryobalanops beccarii, growth performance, reforestation, selective girdlingBiology (General)QH301-705.5ENBiodiversitas, Vol 21, Iss 5 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	dryobalanops beccarii, growth performance, reforestation, selective girdling Biology (General) QH301-705.5
spellingShingle	dryobalanops beccarii, growth performance, reforestation, selective girdling Biology (General) QH301-705.5 Mohd Effendi Wasli Douglas Bungan Ambun Meekiong Kalu Mogeret Sidi Hafsah Nahrawi Hashimah Elias Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling
description	Abstract. Wasli ME, Ambun DB, Kalu M, Sidi M, Nahrawi H, Elias H. 2020. Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling. Biodiversitas 21: 1880-1889. This study was conducted to evaluate the growth performance of planted Dryobalanops beccarii Dyer at reforestation sites after silvicultural practices in Gunung Apeng National Park (GANP), Sarawak. The assessed area was planted with D. beccarii in 2005 and undergo silvicultural treatment by understory clearing which implemented annually. Due to the suppressed growth rate of the planted trees, an additional silvicultural treatment, the selective girdling on selected pioneer species, was implemented once, in 2012. In this study, study plots with two treatments were established: T1: understory clearing only (control plot), and T2: additional selective girdling of existing pioneer species in addition to the understory clearing practice applied in T1. The growth performance of the planted D. beccarii in terms of DBH, height, survival and mean annual increments in diameter (MaiD) and height (MaiH) were assessed and monitored at the initial stage when the selective girdling treatment was applied and 4, 24, 36, 48, 60 and 72 months after girdling. Our findings showed that the survival rates of planted trees at 72 months under treatments T1 and T2 were 82.9% and 79.2%, respectively. The average tree DBH in T2 was significantly higher than that in T1, and the average tree DBH values for T1 and T2 were 7.5 cm and 9.4 cm, respectively. The average tree heights for T1 and T2 were 8.3 m and 9.2 m, respectively. In terms of the mean annual increments in height (MaiH) and diameter (MaiD), those in T2 were significantly higher than those in T1. Our findings indicated that T2 started to show better growth performance than T1 after a period of 36 months. In conclusion, the additional silvicultural treatment by selective girdling at the reforestation site had a long-term, progressive effect on the growth performance of the planted trees.
format	article
author	Mohd Effendi Wasli Douglas Bungan Ambun Meekiong Kalu Mogeret Sidi Hafsah Nahrawi Hashimah Elias
author_facet	Mohd Effendi Wasli Douglas Bungan Ambun Meekiong Kalu Mogeret Sidi Hafsah Nahrawi Hashimah Elias
author_sort	Mohd Effendi Wasli
title	Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling
title_short	Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling
title_full	Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling
title_fullStr	Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling
title_full_unstemmed	Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling
title_sort	assessment on the growth performance of planted dryobalanops beccarii at reforestation sites after implementation of selective girdling
publisher	MBI & UNS Solo
publishDate	2020
url	https://doaj.org/article/c84a36ab6b264a18bd6f4e108f5e668a
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Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling

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