Journal of Tropical Forest Science最新文献

RAFFLESIA AS A HAPAXANTHIC PLANT AND IMPLICATIONS FOR RAFFLESIA CONSERVATION AND MANAGEMENT 莱佛士属单缘植物及其保护与管理的意义

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.489

Ng FSP

引用次数: 0

EFFECT OF SITE AND GROWTH ATTRIBUTES ON LOG END-SPLITTING OF EUCALYPTUS PELLITA GROWN IN NORTHERN BORNEO AND ITS REMEDIAL MEASURES 场地和生长属性对婆罗洲北部褐皮桉原木末端劈裂的影响及补救措施

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.440

M Espey, P Md-Tahir, SH Lee, AS Muhammad-Roseley, R Meder

{"title":"EFFECT OF SITE AND GROWTH ATTRIBUTES ON LOG END-SPLITTING OF EUCALYPTUS PELLITA GROWN IN NORTHERN BORNEO AND ITS REMEDIAL MEASURES","authors":"M Espey, P Md-Tahir, SH Lee, AS Muhammad-Roseley, R Meder","doi":"10.26525/jtfs2023.35.4.440","DOIUrl":"https://doi.org/10.26525/jtfs2023.35.4.440","url":null,"abstract":"Eucalyptus pellita is currently the predominant tree species deployed for tree plantation establishment in many parts of Borneo, particularly in the state of Sabah, Malaysia. This study evaluates the occurrence of end-splitting in four-year old plantation grown E. pellita in Sabah as affected by site and growth attributes. An existing progeny tree breeding trial, involving seeds originated from Papua New Guinea, China, Vietnam, Australia and Sabah with 101 individual families, was used to carry out the split assessment. The trial trees were planted on two contrasting sites which differed significantly in soil type, soil texture, soil physical conditions, effective rooting depth and drainage capacity. Logs from the second thinning were cut into 2.2 m long sections. The end splits were evaluated by using a designated split scoring system. Plastic s-hooks, a wax emulsion end sealer and a bitumen end sealer were used as remediation measure and were compared against a control of no remedial application. The study showed that significant variation exists in log end-splitting, comparing the two sites, in combination with significant variation in tree growth. The variation in log end-splitting is attributed to the variation in tree growth as a response to the different growing conditions. Application of plastic s-hooks reduced split occurrence and severity significantly (49.62%), while the wax and bitumen end sealers had no effect on reduction of growth strain related splits. The findings suggested that end-splitting is caused by complex genetic-environment/site-growth interactions. It is vital to better understand factors involved in log end-splitting to optimise E. pellita plantation management.","PeriodicalId":17389,"journal":{"name":"Journal of Tropical Forest Science","volume":"105 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320594","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

A STANDARD FOR ASSESSMENT OF INDIAN MANGROVES RESPONSE TO SEA-LEVEL RISE USING RSET-MH TECHNIQUE 利用重置- mh技术评估印度红树林对海平面上升反应的标准

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.429

S Singh, S Rangarajan, D Thattai, S Vaithilingam

{"title":"A STANDARD FOR ASSESSMENT OF INDIAN MANGROVES RESPONSE TO SEA-LEVEL RISE USING RSET-MH TECHNIQUE","authors":"S Singh, S Rangarajan, D Thattai, S Vaithilingam","doi":"10.26525/jtfs2023.35.4.429","DOIUrl":"https://doi.org/10.26525/jtfs2023.35.4.429","url":null,"abstract":"Coastal systems, globally, including wetlands, marshlands and mangrove forests, face a severe threat due to climate change and rising sea levels. The Intergovernmental Panel on Climate Change Sixth Assessment Report (IPCC AR-6) has highlighted high-stress levels in South Asian coastal systems, particularly in the Indian Ocean. Mangrove systems are particularly vulnerable and rely on peat accumulation or landward migration to survive. The rod surface elevation table marker horizon (RSET-MH) technique finds widespread usage among researchers to comprehend the response of coastal wetlands to sea-level fluctuations. However, there is a need for national-level research on mangrove response to sea-level rise and for establishing RSET stations in mangrove forests across India. Establishing comprehensive and coordinated monitoring networks for coastal wetlands is proposed to address this gap. The present study outlined the methodology adopted in setting up the first RSET-MH station in Pichavaram mangrove forest, Tamil Nadu. The estimated cost of setting up a single RSET station ranges from INR 9,000 to INR 15,000. A coordinated monitoring system for RSET stations is crucial to ensure the survival of coastal systems in the face of climate change. The study outlined a coordinated monitoring system for RSET stations across India that will help authorities develop and implement coastal climate change adaptation strategies, critical to ensure the long-term survival of mangrove systems. It would also enable researchers to comprehend how coastal wetlands have responded to sea-level fluctuations in the past and present, and identify appropriate adaptation measures to prepare for future changes.","PeriodicalId":17389,"journal":{"name":"Journal of Tropical Forest Science","volume":"94 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320611","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

MORPHOLOGICAL VARIATION AND GEOGRAPHICAL DISTRIBUTION OF A NEWLY RECORDED RAFFLESIA ZOLLINGERIANA (RAFFLESIACEAE) 一种新记录水仙花(rafflesaceae)的形态变异及地理分布

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.465

A Susatya, D Lestari, R Mahyuni, YWC Kusuma, SH Dalimunthe, N Nurchayati, F Ardiyansyah, H As’ari

引用次数: 1

ALLOMETRIC MODEL COMPARISON AND COMPONENTS BIOMASS EVALUATION OF ALNUS NEPALENSIS, RHODODENDRON ARBOREUM AND TECTONA GRANDIS 尼泊尔桤木、杜鹃和大构造的异速生长模型比较及组分生物量评价

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.377

U Sharma, S Gupta, PK Gupta

引用次数: 0

SHORT-TERM SEDIMENT ACCRETION DYNAMICS OF PICHAVARAM MANGROVE FOREST, TAMIL NADU, INDIA 印度泰米尔纳德邦pichavaram红树林的短期泥沙增积动力学

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.455

S Singh, S Rangarajan, D Thattai

{"title":"SHORT-TERM SEDIMENT ACCRETION DYNAMICS OF PICHAVARAM MANGROVE FOREST, TAMIL NADU, INDIA","authors":"S Singh, S Rangarajan, D Thattai","doi":"10.26525/jtfs2023.35.4.455","DOIUrl":"https://doi.org/10.26525/jtfs2023.35.4.455","url":null,"abstract":"The influence of mangrove systems in advancing the process of sedimentation is very well studied over the years. However, understanding the actual mechanism of accretion at a specific point within a mangrove forest is difficult, due to the stochasticity of sediment distribution and deposition. Factors that influence the rate of sediment accretion within the mangrove forest such as plant litter accumulation and bioturbation were investigated in Pichavaram mangrove forest, India. The annual rate of vertical accretion was recorded as 1.5 ± 0.9 cm year -1 for the site at elevation 0.4 m, and 0.9 ± 0.04 and 0.9 ± 0.05 cm year -1 for the other two sites which are at -0.8 and -1.2 m respectively. Results show that the sites were accreting sediments but at varying rates, inter-site variability was low but the factors influencing the processes were different. Plant litter contributed significantly to the accretion, and organic matter estimates also supported this observation. A higher rate of organic matter accumulation was observed in one of the sites, which is not regularly inundated by tides. On the contrary, in sites which were regularly washed by tides, accretion was seen in both allochthonous and autochthonous inputs and the annual rate of vertical accretion was almost the same.","PeriodicalId":17389,"journal":{"name":"Journal of Tropical Forest Science","volume":"103 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320596","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

PONGAMIA SEED: A POSSIBLE SOURCE OF GREEN ENERGY FOR POWER GENERATION 沙蚕籽:一种可能用于发电的绿色能源

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.391

T Eevera, S Venkatesh, N Vinothini, R Umarani, S Ganesh, A Raviraj

{"title":"PONGAMIA SEED: A POSSIBLE SOURCE OF GREEN ENERGY FOR POWER GENERATION","authors":"T Eevera, S Venkatesh, N Vinothini, R Umarani, S Ganesh, A Raviraj","doi":"10.26525/jtfs2023.35.4.391","DOIUrl":"https://doi.org/10.26525/jtfs2023.35.4.391","url":null,"abstract":"Pongamia ( Pongamia pinnata ) is a prospective biofuel plant with 35 to 45% seed oil. The physical and chemical characteristics of pongamia oil are quite comparable to those of diesel. Pongamia seed oil has been considered as a possible biodiesel source for the past 10 years. The high viscosity and conradson carbon residue of pongamia oil, however, preclude its usage in this capacity. Thus, methyl ester was produced from pongamia oil by optimising the different parameters of transesterification reaction viz. , reaction time (90 minutes), amount of catalysist (1.5 wt.%), amount of methanol (210 ml per liter of oil) and optimum temperature (50 ° C) needed to complete the conversion of oil into methyl ester. The produced methyl ester was employed as fuel instead of diesel in the engine test using a single-cylinder, naturally aspirated, direct injection diesel engine. Parameters such engine speed, electrical efficiency, lower and higher heating values, and fuel consumption were investigated. Speed regulation and voltage regulation in the engine experiment provided clear evident that the biodiesel from pongamia oil could be used in an existing diesel engine without any engine modifications. The physical and chemical properties of the methyl ester were also estimated. The biodiesel produced from quality pongamia seed meets the cetane number (52.90) and iodine value (99) as per the biodiesel quality specifications and can be used in varied climatic conditions","PeriodicalId":17389,"journal":{"name":"Journal of Tropical Forest Science","volume":"102 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320599","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

ESTIMATION ON VOLUME-WEIGHTED AVERAGE WOOD DENSITY OF MALAYSIAN TIMBER FOR CALCULATION OF CARBON STOCK 估算马来西亚木材的体积加权平均木材密度以计算碳储量

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.417

CB Ong, H Khairul-Izzuddin, AR Zairul

引用次数: 0

CREATING A CORE COLLECTION OF SUPERIOR ALNUS NEPALENSIS TREES BASED ON PHENOTYPE AND MOLECULAR MARKER DATA 基于表型和分子标记数据建立优质尼泊尔桤木核心集合

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.476

XL Wang, GQ Zou, ZL Cao

{"title":"CREATING A CORE COLLECTION OF SUPERIOR ALNUS NEPALENSIS TREES BASED ON PHENOTYPE AND MOLECULAR MARKER DATA","authors":"XL Wang, GQ Zou, ZL Cao","doi":"10.26525/jtfs2023.35.4.476","DOIUrl":"https://doi.org/10.26525/jtfs2023.35.4.476","url":null,"abstract":"Towards the improved preservation and management of high-quality germplasm resources for Alnus nepalensis , a total of 84 samples from 28 superior A. nepalensis trees were used as an original germplasm collection. An optimal strategy for the creation of a core collection of superior A. nepalensis trees was devised by comparing the validity of 18 germplasm subsets. Each of these germplasm subsets was configured using unweighted average clustering and improved minimum distance stepwise sampling methods that integrated six sampling proportions, three data types, and three genetic distance methods. The germplasm subsets for the original germplasm collection were evaluated by quantitative and qualitative trait independence tests according to the data types. The results revealed that the developed germplasm subsets based on phenotype data and Euclidean genetic distances at 55, 45, 35 and 25% sampling proportions; molecular marker data and Nei’s genetic distances at 55, 45, 35, 25 and 15% sampling proportions; and combined phenotype and molecular marker data and mixed genetic distances at 55, 45, 35 and 25% sampling proportions could represent the original germplasm collection. The strategy of phenotype values and Euclidean genetic distance were more appropriate than integrating the phenotype and molecular markers data and mixed genetic distance for the creation of a core collection for superior A. nepalensis trees.Considering the effectiveness, practicability, and cost of the development of a core collection for superior A. nepalensis trees, an optimal strategy included an unweighted average technique, improved minimum distance stepwise sampling method, SRAP markers data, Nei’s genetic distance, and a 15% sampling proportion.","PeriodicalId":17389,"journal":{"name":"Journal of Tropical Forest Science","volume":"113 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320789","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

THE EFFECT OF AQUILARIA MALACCENSIS SEED PRIMED WITH GIBBERELLIC ACID AND INDOLE BUTYRIC ACID 赤霉素酸和吲哚丁酸对黑木香种子的影响

4区农林科学

Journal of Tropical Forest Science Pub Date : 2023-11-01 DOI: 10.26525/jtfs2023.35.4.367

S Kharnaior, SC Thomas

引用次数: 0