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EFFECTS OF CANOPY OPENNESS ON SEEDLING SURVIVAL AND GROWTH AFTER SELECTIVE LOGGING IN A MONODOMINANT LOWLAND SWAMP FOREST IN COSTA RICA 哥斯达黎加单一优势低地沼泽林选择性采伐后林冠开放度对幼苗存活和生长的影响
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2022-01-26 DOI: 10.26525/jtfs2022.34.1.34
OJ Valverde-Barrantes, J. Hogan, OJ Rocha
The mechanism proposed to explain tree monodominance in tropical forests is that the dominant species forms a dense canopy and produces shade-tolerant seedlings, which together favor selfreplacement. Under this hypothesis, seedlings of monodominant species should have limited ability to respond to drastic increases in understory light, like those resulting from logging. Therefore, monodominant species should lose their seedling dominance after logging-induced canopy opening. To test this hypothesis, the current study measured seedling survival and growth of the monodominant species, Prioria copaifera, and its main competitor, Pentaclethra macroloba, in two forest stands that differ in logging history and in an unlogged stand in southeastern Costa Rica. Although, growth rates and survival of previously established seedlings were similar for both species across the three stands, seedling survival and growth decreased as light increased, with the effect being more pronounced for Prioria than for Pentaclethra. The study also investigated the ability of Prioria to respond to changing light environments by transplanting seedlings into logging-induced canopy gaps. Contrary to prediction, Prioria seedlings survived and grew better in gap centers than in gap edges or under a closed canopy. This result contrasts with established seedlings that cannot acclimate to changes in light conditions. Therefore, we conclude that continued Prioria dominance in selectively logged forests depends more on seedling production after canopy disturbance than on the established seedling present before disturbances.
解释热带森林中树木单一优势的机制是,优势物种形成密集的树冠并产生耐荫的幼苗,这两者共同有利于自我替代。根据这一假设,单优势物种的幼苗对林下光照急剧增加的反应能力应该有限,比如伐木引起的光照。因此,在伐木诱导的树冠开放后,单优势种应该失去其幼苗优势。为了验证这一假设,目前的研究测量了单优势物种Prioria copifera及其主要竞争对手Pentaclethra macoloba在两个伐木历史不同的林分和哥斯达黎加东南部一个未伐木的林分中的幼苗存活和生长。尽管这三个林分中两个物种先前建立的幼苗的生长率和存活率相似,但幼苗的存活率和生长率随着光照的增加而下降,Prioria的影响比Pentaclethra更明显。该研究还调查了Prioria通过将幼苗移植到伐木引起的树冠间隙中来应对光环境变化的能力。与预测相反,Prioria幼苗在间隙中心比在间隙边缘或封闭的树冠下存活并生长得更好。这一结果与不能适应光照条件变化的成熟幼苗形成对比。因此,我们得出结论,在选择性砍伐的森林中,Prioria的持续优势更多地取决于树冠扰动后的幼苗产量,而不是扰动前的已建立幼苗。
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引用次数: 0
FORMULATION OF ALTERNATIVE MEDIA FOR FUNGAL GROWTH AND ITS APPLICATION AS AGARWOOD-INDUCING AGENT IN AQUILARIA TREES 真菌生长替代培养基的配方及其在沉香诱导剂中的应用
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2022-01-26 DOI: 10.26525/jtfs2022.34.1.127
Z. Rozihawati, WA Wan-Muhammad-Azrul, Noor-Baity, M. Sheriza, A. Hazandy, A. Mohd-Farid, S. Zaiton
This study investigated the growth performance of Fusarium proliferatum isolated from agarwood, on different types of plated media prepared with liquid broth extracts of locally available agricultural products. The potential of F. proliferatum in selected media to induce agarwood formation in Aquilaria trees was also assessed. A total of 27 media formulations were evaluated as alternative media to potato dextrose agar (PDA) for F. proliferatum. The effects of culture media on the diameter growth of fungal mycelium were significant (F = 6.70, df = 26, p < 0.01). The best growth was recorded on 50% soybean followed by PDA and 70% kidney bean with mean mycelium diameters of 7.00 ± 0.00, 6.63 ± 0.83 and 6.50 ± 0.06 cm respectively. In the field trial, F. proliferatum in all three media successfully induced agarwood formation on A. malaccensis and A. crassna with significant discoloration zones compared with the uninoculated control trees (p ≤ 0.05) after five months. Fifty percent soybean in combination with F. proliferatum induced the largest discoloration zone, indicating potential as a cheaper and more accessible alternative to PDA. These results suggest that the combination of a chemical inducer in the form of a liquid media formulation and a biological inducer, in this case, an endophytic fungus could successfully induce agarwood formation in Aquilaria trees.
研究了沉香分离的增粘镰刀菌(Fusarium proliferatum)在不同类型的镀膜培养基上的生长性能。在选定的培养基中,对增叶镰刀菌诱导沉香形成的潜力进行了评价。对27种培养基作为马铃薯葡萄糖琼脂(PDA)的替代培养基进行了评价。培养基对真菌菌丝直径生长的影响显著(F = 6.70, df = 26, p < 0.01)。其中,50%的大豆生长最好,其次是PDA和70%的芸豆,平均菌丝直径分别为7.00±0.00、6.63±0.83和6.50±0.06 cm。在田间试验中,与未接种对照相比,5个月后,3种培养基均能成功诱导马拉卡木和草木香的形成,且木木香变色带显著(p≤0.05)。50%的大豆与增芽梭菌的组合诱导了最大的变色区,表明了作为PDA的更便宜和更容易获得的替代品的潜力。这些结果表明,液体介质形式的化学诱导剂和生物诱导剂的组合,在这种情况下,内生真菌可以成功地诱导沉香树形成沉香。
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引用次数: 1
LATERAL GROWTH AFFECTS XYLEM MATURATION PROPERTIES OF 8-YEAR-OLD BIG-LEAF MAHOGANY (SWIETENIA MACROPHYLLA) 侧方生长对8年生大叶桃花心木木质部成熟特性的影响
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2022-01-26 DOI: 10.26525/jtfs2022.34.1.1
DM Gilbero, WP Abasolo, M. Matsuo, H. Yamamoto
The area of juvenile wood zone of an 8-year-old planted big-leaf mahogany (Swietenia macrophylla) was uniform regardless of diameter. Hence, it was assumed that xylem maturation is dependent on diameter. Radial distribution patterns with reference from the pith exhibited short fibre and vessel lengths, narrow vessel width and low xylem density, and exhibited gradual increase outward and became more or less stable near the bark. However, the radial distribution patterns of fibre width and modulus of elasticity were scattered regardless of tree diameter sizes. Fibre length, vessel length, vessel width and xylem density of the juvenile wood zones showed significant differences compared with the transition and mature wood zones. However, no significant difference was observed between transition wood zone and mature wood zone except for fibre length. A negative correlation was observed in fibre length, vessel length, vessel width and xylem density in terms of their relationship with diameter at breast height and the radial distribution of fibre (i.e. b-value), and the diameter boundaries of the three wood zones. At diameters 18.08, 17.36, 16.23 and 17.87 cm respectively, fibre length, vessel length, vessel width and xylem density can be used to identify xylem maturation boundary.
8年生人工大叶红木幼木带面积均匀,与直径无关。因此,假设木质部的成熟与直径有关。以髓为参考的径向分布表现为纤维和导管长度短,导管宽度窄,木质部密度低,向外逐渐增加,在树皮附近趋于稳定。然而,无论树径大小,纤维宽度和弹性模量的径向分布都是分散的。幼木带的纤维长度、导管长度、导管宽度和木质部密度与过渡木带和成熟木带相比差异显著。除了纤维长度外,过渡木区与成熟木区之间无显著差异。纤维长度、导管长度、导管宽度和木质部密度与胸高直径、纤维径向分布(即b值)和三个木区直径边界的关系呈负相关。在直径分别为18.08、17.36、16.23和17.87 cm处,利用纤维长度、导管长度、导管宽度和木质部密度可以识别木质部成熟边界。
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引用次数: 0
EFFECTS OF TREE SPACING AND FORKING ON THE MODIFICATION OF WOOD DENSITY IN A TRIAL PLANTATION OF TACHIGALI VULGARIS FOR ENERGY IN AMAZONIA 间伐和叉伐对亚马逊地区普通大枣能量林木材密度变化的影响
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2022-01-26 DOI: 10.26525/jtfs2022.34.1.11
UO Barros-Junior, Was Rosário, Mdr Lima, M. Silva, Eps Patrício, D. Gonçalves, L. Bufalino, TP Protásio
The study investigated the intra-stem and inter-stem variations of wood basic density in Tachigali vulgaris, influenced by different planting spacing and the occurrence of forking in a trial carried out in Pará State, Brazil. The experiment was performed in a randomised block design, arranged in a split-plot scheme, where plot effect was constituted by planting spacing (4.5, 6.0, 7.5, 9.0, 10.5 and 12.0 m2) and forking, as the effect of subplot (forked or not forked). The wood basic density increased from narrower to wider planting spacings. The wood basic densities in planting spacings of 9 m² (0.517 g cm-3) and 12 m² (0.529 g cm-3) were 16.9 and 19.4% higher compared to the lowest planting spacing of 4.5 m2 (< 0.500 g cm-3). Forking reduced wood density by almost 7% and promoted a wider variation within the stem. Forked stems decreased basic density towards the base-top direction. The findings suggested that, 87-months-old wood of T. vulgaris is suitable for energy purposes, and recommended for the establishment of homogeneous plantations in Brazilian Amazonia.
在巴西帕尔州进行了一项试验,研究了不同种植间距和分岔发生对塔奇加利(Tachigali vulgaris)木材基本密度的茎内和茎间变化。试验采用随机区组设计,采用分畦方案,小区效应由种植间距(4.5、6.0、7.5、9.0、10.5和12.0 m2)和分畦(分畦或不分畦)构成。木材基本密度由较窄的种植间距向较宽的种植间距增加。9 m²(0.517 g cm-3)和12 m²(0.529 g cm-3)的木材基本密度比最低的4.5 m²(< 0.500 g cm-3)分别高出16.9%和19.4%。分岔使木材密度降低了近7%,并促进了茎内更大的变异。分叉茎沿基部至顶部方向降低了基本密度。研究结果表明,87个月龄的柽柳木材适合用于能源用途,建议在巴西亚马逊地区建立同质人工林。
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引用次数: 4
STAND STRUCTURE AND PRODUCTIVITY OF THE FIREFLY RIVERINE MANGROVE HABITAT AT THREE RIVERS IN PENINSULAR MALAYSIA 马来西亚半岛三条河流萤火虫河岸红树林栖息地的林分结构和生产力
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2022-01-26 DOI: 10.26525/jtfs2022.34.1.114
SR Nur-Fatehah, I. Nur-Shafikah, K. Shamsul, WA Wan-Juliana, Norela Sulaiman, MH Shahril, AD Nurul-Darsani
Studies on floristic composition, forest structure and tree diversity are important to determine the pattern of stand structure, current status and floristic variation of firefly riverine mangrove habitats in Peninsular Malaysia. Thus, this study was conducted in three rivers, namely Sungai Chukai, Terengganu, Sungai Rembau-Linggi, Negeri Sembilan and Sungai Sepetang, Taiping, Perak. A total of 647,362 and 514 tree stands measuring 1 cm diameter and above were enumerated in 0.5 ha plots at the three sites, respectively. A total of 40 species were recorded in Sungai Chukai, 17 species in Sungai Rembau-Linggi and 14 species in Sungai Sepetang. The 0.5, 0.35 and 0.40 ha of each study site, respectively, were capable of capturing all the species in the mangrove forest. Rhizophoraceae family was found to have the highest density and basal area in all the study sites. The highest species density for Sungai Chukai, Sungai Rembau-Linggi and Sungai Sepetang was R. apiculata with a density of 262 ind ha-1, 120 ind ha-1 and 516 ind ha-1, respectively. The major contributor of total basal area at Sungai Chukai, Sungai Rembau-Linggi and Sungai Sepetang were X. granatum (5.5583 m2 ha-1) and R. apiculata with 10.6833 m2 ha-1 and 11.7491 m2 ha-1, respectively. Diversity and species richness were higher at Sungai Chukai (H’= 2.82, R’= 6.03) compared to Sungai Rembau-Linggi (H’=2.09, R’= 2.72) and Sungai Sepetang (H’=1.43, R’= 2.08). The highest total biomass of mangrove forest was at Sungai Rembau-Linggi with 321.21 t ha-1 followed by Sungai Sepetang (247.41 t ha-1) and Sungai Chukai (210.36 t ha-1). These results indicated that the current status of community structure and vegetation varied among the rivers. The study can act as a guideline in the management plan of firefly habitats, which also affect firefly distribution along the three rivers in Peninsular Malaysia.
研究马来半岛萤火虫河红树林的区系组成、森林结构和树木多样性对确定林分结构格局、现状和区系变化具有重要意义。因此,本研究在三条河流进行,即双溪Chukai, Terengganu,双溪Rembau-Linggi, Negeri Sembilan和双溪Sepetang,太平,霹雳州。在这三个地点的0.5公顷土地上,分别有647,362个和514个直径为1厘米及以上的树木。在双溪楚凯共记录到40种,在双溪林堡岭矶共记录到17种,在双溪九塘共记录到14种。每个研究点的面积分别为0.5、0.35和0.40 ha,可以捕获红树林中所有的物种。根霉科植物在所有研究点的密度和基面积均最高。双溪楚凯、双溪林陵鸡和双溪塞贝塘的密度最高的种是尖翅小蠊,分别为262、120和516个ha-1。双溪楚凯、双溪林陵矶和双溪塞佩塘对总基面积贡献最大的分别是石子松(5.5583 m2 ha-1)和尖叶松(10.6833 m2 ha-1)和11.7491 m2 ha-1。双溪初凯的物种多样性和丰富度(H′= 2.82,R′= 6.03)高于双溪Rembau-Linggi (H′=2.09,R′= 2.72)和双溪Sepetang (H′=1.43,R′= 2.08)。红树林总生物量最高的是双溪林堡-岭矶,为321.21 t ha-1,其次是双溪七塘(247.41 t ha-1)和双溪楚凯(210.36 t ha-1)。这些结果表明,河流群落结构和植被的现状各不相同。该研究可为萤火虫栖息地的管理规划提供指导,从而影响马来西亚半岛三河流域萤火虫的分布。
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引用次数: 0
PRESERVATIVE TREATMENT OF BAMBOO CULM FOR PRODUCING GREEN COLOUR AND ENHANCING FUNGAL DURABILITY 竹秆的防腐处理以产生绿色并提高真菌的耐久性
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2022-01-26 DOI: 10.26525/jtfs2022.34.1.83
JJ Oh, J. Ra, Ghahyun J. Kim
This research was performed to investigate the feasibility of using copper-based wood preservative treatment for producing green colour on the bamboo surface and enhancing the fungal decay resistance of treated bamboo. Preliminary outdoor weathering tests were carried out to evaluate the green colour fastness of treated bamboo culms. In addition, fixation and leaching tests were also conducted to evaluate the safety of preservative-treated bamboo. A two-step treatment process was recommended to enhance bamboo green colour production, fungal decay resistance, production rate of treated bamboo and prevent sludge formation in treatment solution. In the treatment process, the bamboo was pressure-treated until refusal point with 4% chromated copper arsenate-3 to achieve required preservative retention and dipped into 4% chromated copper arsenate-3 for 2 days to produce green colour on the bamboo surface. The chromated copper arsenate-treated bamboo samples had outstanding colour fastness and mildew resistance after 24 months of outdoor weathering. The fixation and leaching tests demonstrated that the total amount of preservative components leached from the chromated copper arsenate-treated bamboo samples was high to raise safety issues and caused environmental problem during the use of treated bamboo in the field.
本研究旨在探讨铜基木材防腐处理在竹子表面产生绿色并提高处理后的竹子抗真菌腐朽能力的可行性。对处理后的竹秆进行了初步的户外耐候性试验,以评价其绿色牢度。此外,还进行了固定和浸出试验,以评估防腐处理竹子的安全性。建议采用两步处理工艺,以提高处理后竹子的绿色产量、抗真菌腐烂能力、生产率,并防止处理液中污泥的形成。在处理过程中,用4%铬酸砷酸铜-3对竹子进行压力处理,直到达到拒绝点,以达到所需的防腐剂保留率,并浸入4%铬酸砷酸铜-3中2天,使竹子表面呈现绿色。用铬酸砷酸铜处理的竹子样品经过24个月的户外风化处理后,具有优异的色牢度和防霉性。固定和浸出试验表明,从铬酸盐砷酸铜处理的竹子样品中浸出的防腐剂成分总量较高,这引发了安全问题,并在现场使用处理过的竹子时造成了环境问题。
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引用次数: 0
MICROPROPAGATION OF NEPENTHES HYBRID (N. VIKING × N. MIRANDA) USING A TEMPORARY IMMERSION BIOREACTOR SYSTEM, SETISTM 利用SETISTM临时浸没生物反应器系统进行猪笼草杂交种(维金猪笼草×米兰达猪笼草)的微繁殖
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2021-10-11 DOI: 10.26525/jtfs2021.33.4.494
AR Siti-Suhaila, M. Norwati
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引用次数: 2
DEVELOPMENT AND CHARACTERISATION OF EST-SSR MARKERS FOR GENETIC ANALYSIS OF CASUARINA SPECIES 木麻黄品种EST-SSR遗传分析标记的建立与鉴定
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2021-10-11 DOI: 10.26525/jtfs2021.33.4.425
Z. Li, Y. Zhang, P. Hu, C. Zhong, Yc Wei, JX Meng, Y. Wang, D. Bush
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引用次数: 0
METAGENOMIC INSIGHTS ON SOIL MICROBIOME BIODIVERSITY FROM AN ERODING COASTLINE OF TANJUNG PIAI, JOHOR STATE PARK, MALAYSIA 马来西亚柔佛州丹绒比艾海岸侵蚀土壤微生物生物多样性的宏基因组研究
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2021-10-11 DOI: 10.26525/jtfs2021.33.4.414
V. Jeyanny, A. Nur-Nabilah, B. Norlia, G. Krishnasamy, SL Lee, NR Singh, Z. Muhammad- Amiruddin
{"title":"METAGENOMIC INSIGHTS ON SOIL MICROBIOME BIODIVERSITY FROM AN ERODING COASTLINE OF TANJUNG PIAI, JOHOR STATE PARK, MALAYSIA","authors":"V. Jeyanny, A. Nur-Nabilah, B. Norlia, G. Krishnasamy, SL Lee, NR Singh, Z. Muhammad- Amiruddin","doi":"10.26525/jtfs2021.33.4.414","DOIUrl":"https://doi.org/10.26525/jtfs2021.33.4.414","url":null,"abstract":"","PeriodicalId":17389,"journal":{"name":"Journal of Tropical Forest Science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43244749","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}
引用次数: 0
ASSESSING WIND DAMAGE RISK IN COMPLEX TERRAIN USING AN AERODYNAMIC MODEL IN ACACIA HYBRID PLANTATIONS IN QUANG TRI, VIETNAM 利用空气动力学模型评估越南广治金合欢杂交人工林复杂地形风害风险
IF 0.9 4区 农林科学 Q4 FORESTRY Pub Date : 2021-10-11 DOI: 10.26525/jtfs2021.33.4.501
N. Minh, K. Koyano, H. Mizunaga
{"title":"ASSESSING WIND DAMAGE RISK IN COMPLEX TERRAIN USING AN AERODYNAMIC MODEL IN ACACIA HYBRID PLANTATIONS IN QUANG TRI, VIETNAM","authors":"N. Minh, K. Koyano, H. Mizunaga","doi":"10.26525/jtfs2021.33.4.501","DOIUrl":"https://doi.org/10.26525/jtfs2021.33.4.501","url":null,"abstract":"","PeriodicalId":17389,"journal":{"name":"Journal of Tropical Forest Science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43404518","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}
引用次数: 0
期刊
Journal of Tropical Forest Science
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