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Radial growth and non-structural carbohydrate partitioning response to resin tapping of slash pine(Pinus elliottii ***)

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Journal of Forestry Research 2022年第2期33卷 423-433页

作者： Baoguo Du Qifu Luan Zhanglin Ni Honggang Sun jingmin jiang College of Life Science and Biotechnology Ecological and Security Key Laboratory of Sichuan ProvinceMianyang Normal UniversityMianyang 621000People’s Republic of China Chair of Tree Physiology Institute of Forest SciencesAlbert Ludwigs-Universitat FreiburgGeorges-Köhler-Allee 5379110 FreiburgGermany Institute of Subtropical Forestry Research of the Chinese Academy of Forestry Fuyang 311400People’s Republic of China

Slash pine(Pinus elliottii ***)is a resin-producing species grown worldwide for significant economic benefits for wood *** tapping cre-ates a carbon sink at the expense of carbon allocation for growth and consequently,wood production may be ***-structural carbohydrates comprising starch and sugars stored in plant organs,may serve as intermediate pools between assimilation and ***,the effect of resin tapping between tree growth and non-structural carbo-hydrates is not well *** study investigated(1)the effects of resin tapping on radial growth,(2)the effects of resin tapping on non-structural carbohydrate pools in different compartments,and(3)the feasibility of resin pro-duction without disruption of tree *** one-year-old slash pines were subjected to resin tapping over two suc-cessive ***-structural carbohydrate concentrations in needles,branches,stem phloem,and roots of tapped and untapped trees in summer and winter were determined after the second year of resin *** results showed that tapping had no significant effects on annual *** was the dominant non-structural carbohydrate frac-tion,regardless of tissues and season,and constituted up to 99%of the total non-structural carbohydrates in the phloem and *** and fructose were the dominant sugars;sucrose was *** with the controls,tapped trees showed 26%lower non-structural carbohydrate concen-tration in the phloem above the tapping wound in summer,which was attributable to the decreased abundance of starch,glucose,fructose,and *** winter,the altered non-structural carbohydrate profiles in the phloem above the tap-ping wounding were minimised as a result of recovery of the sugar *** contrast to free sugars,which accu-mulated substantially in needles and branches during winter,starch was enriched in the phloem,roots,and current-year *** results provide evidence fo

关键词： Slash pine Localised effects Non-structural carbohydrate Resin tapping Radial growth

10年生香椿生长与形质性状的种源变异及选择

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浙江农林大学学报 2024年第3期41卷 597-605页

作者：沈汉郑成忠邱勇斌汪清华华克达缪强范艳如姜景民韦一刘军开化县林场浙江开化324300 浙江省开化县林业局浙江开化324300 浙江省杭州市富阳区农业农村局浙江杭州311400 中国林业科学研究院亚热带林业研究所浙江杭州311400

【目的】通过分析10年生香椿Toona sinensis生长与形质性状的种源变异,揭示不同性状在地理种源上的变异规律,并进行种源区划及优良种源选择。【方法】以浙江开化县林场的10年生香椿种源林为试材,测定其树高、胸径、枝下高、冠幅、材积... 详细信息

【目的】通过分析10年生香椿Toona sinensis生长与形质性状的种源变异,揭示不同性状在地理种源上的变异规律,并进行种源区划及优良种源选择。【方法】以浙江开化县林场的10年生香椿种源林为试材,测定其树高、胸径、枝下高、冠幅、材积、树干圆满度和树冠圆满度,获取各种源生态环境因子,进行方差、主成分、相关性和聚类等分析,计算广义遗传力、综合选择指数和遗传增益,阐明生长和形质性状地理变异模式及与产地生态因子关系。【结果】树高、胸径、树干圆满度和材积存在极显著(P<0.01)种源差异,种源胸径、树高、冠幅、枝下高和材积呈典型的纬向变异模式。种源胸径与冠幅、枝下高和材积之间均呈极显著(P<0.01)正相关。胸径与产地年平均气温、最冷月平均日最低气温和最干燥季节日平均气温等显著(P<0.05)正相关。根据种源聚类结果,可将香椿划分为南部和北部2个种源区,并筛选出3个优良种源,分别为元谋、恩施和太和。【结论】10年生香椿种源间差异显著,并且树高、胸径、材积等性状存在从南向北逐渐减小的变异规律,对其进行选择时胸径是主要的遗传改良性状,可为材用型香椿良种选择提供可靠依据。

关键词：香椿遗传变异纬度变异温度种源区

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南方低山丘陵区彩叶无患子优良种源及家系选择

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福建林业科技 2024年第1期51卷 62-68页

作者：方宏峰李永祥朱琪黄世清张永志姜景民邵文豪安吉县龙山林场浙江湖州313300 中国林业科学研究院亚热带林业研究所浙江杭州311400 中国林业科学研究院亚热带林业科研实验中心江西新余336600

为筛选适宜江南低山丘陵地区进行生态景观林营建及林分改造的彩叶无患子优良种源和家系,于2017年,在江西分宜县山下林场,以无患子5个种源45个家系7年生的试验林为研究对象,分析和评价不同种源和家系的生长表现和秋叶呈色效果。结果表明... 详细信息

为筛选适宜江南低山丘陵地区进行生态景观林营建及林分改造的彩叶无患子优良种源和家系,于2017年,在江西分宜县山下林场,以无患子5个种源45个家系7年生的试验林为研究对象,分析和评价不同种源和家系的生长表现和秋叶呈色效果。结果表明,无患子不同家系间树高及胸径性状差异极显著(P<0.01),枝下高性状差异显著(P<0.05);不同种源间树高、胸径、枝下高及冠幅性状均差异极显著(P<0.01),叶色性状差异显著(P<0.05)。无患子各性状广义遗传力变化范围为0.68~0.94,其中浙江遂昌种源遗传增益最大,均值为19.62%。UPGAM聚类分析表明,浙江遂昌种源的7个家系单独聚为同一个分枝,各性状表现优良。Pearson相关性分析表明,无患子树高、胸径和枝下高性状间均具有极显著相关性(P<0.001),冠幅与树高和胸径间具有极显著相关性(P<0.001);叶色性状仅与冠幅具有极显著相关性(P<0.01),与其它3个生长性状无显著相关性。无患子树高、胸径及枝下高性状在不同家系和种源间存在丰富的变异,叶色和冠幅性状变异来源主要为种源,综合选择出浙江遂昌种源的7个家系为无患子彩叶优良种源家系。

关键词：无患子生长性状叶色性状遗传变异种源家系

Spectrometric Prediction of Nitrogen Content in Different Tissues of Slash Pine Trees

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Plant Phenomics 2022年第1期4卷 420-429页

作者： Yanjie Li Honggang Sun Federico Tomasetto jingmin jiang Qifu Luan Research Institute of Subtropical Forestry Chinese Academy of ForestryHangzhouZhejiang 311400China AgResearch Ltd. Christchurch 8140New Zealand

The internal cycling of nitrogen(N)storage and consumption in trees is an important physiological mechanism associated with tree ***,we examined the capability of near-infrared spectroscopy(NIR)to quantify the N concentration across tissue types(needle,trunk,branch,and root)without time and *** NIR spectral data of different tissues from slash pine trees were collected,and the N concentration in each tissue was determined using standard analytical method in laboratory.

关键词： pine cycling consuming

Ecological succession of a natural community of Castanopsis sclerophylla on Laoshan Island, China

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Journal of Forestry Research 2016年第5期27卷 1171-1176页

作者： Huafeng Yue Wenhao Shao jingmin jiang Xiangkuan Li Simei Sun Non-timber Forestry Research and Development Center Chinese Academy of Forestry and China PaulowniaResearch and Development Center No. 3 Weiwu RoadZhengzhou City 450003 People's Republic of China Research Institute of Subtropical Forestry Chinese Academy of Forestry No. 73 Daqiao Road Fuyang City 31140People's Republic of China Dazu County Forestry Bureau No. 58 West Nanhuan RoadChongqing City 402360 People's Republic of China

Castanopsis sclerophylla was surveyed for its root turion capacity on Laoshan Island in Zhejiang Pro- vince and dispersion patterns of seedlings, genetic diversity and genetic variation coefficient was studied using a SSR （simple sequence repeat） molecular marker technique to explore the genetic diversity of C. sclerophylla （Lindl.） Schott as a community and evaluate the community＇s development. The results showed that C. sclerophylla had strong root turion capacity, of which type Re2 was the most frequent, accounting for 32.4 and 82.4 % of the seedlings under the stock plant were from within-community mating; the 6 pairs of SSR primers chosen yielded high resolution with 97.6 % polymorphic sites; the within-community genetic diversity was over 88.9 % with stock plants （0.49）〉 seedling plants （0.45）. Apparently, C. scerophyllan on Laoshan Island, propagating mainly by root tufions, has developed high genetic diversity within a short period, keeping the community in a stage of stable growth and moving toward a climax community. The tillers, however, aggravate closing of the community so that it receives less pollen from outside. Within-community mating is thus reaching seriously high levels, which can lead to lower within-community genetic variation, a decline in DNA genetic diversity, and is bad for its development. Therefore, human interference should be taken to expand genetic exchange among communities.

关键词： Castanopsis scerophylla . Ecologicalsuccession Genetic diversity Natural communitiesSSR molecular marker

Enabling Breeding Selection for Biomass in Slash Pine Using UAV-Based Imaging

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Plant Phenomics 2022年第1期4卷 310-323页

作者： Zhaoying Song Federico Tomasetto Xiaoyun Niu Wei Qi Yan jingmin jiang Yanjie Li Research Institute of Subtropical Forestry Chinese Academy of ForestryNo.73Daqiao RoadFuyangHangzhou311400 Zhejiang ProvinceChina College of Landscape and Travel Agricultural University of HebeiBaodingChina AgResearch Ltd. Christchurch 8140New Zealand Auckland University of Technology Auckland 1010New Zealand

Traditional methods used to monitor the aboveground biomass(AGB)and belowground biomass(BGB)of slash pine(Pinus elliottii)rely on on-ground measurements,which are time-and cost-consuming and suited only for small spatial *** this paper,we successfully applied unmanned aerial vehicle(UAV)integrated with structure from motion(UAV-SfM)data to estimate the tree height,crown area(CA),AGB,and BGB of slash pine for in slash pine breeding plantations sites.

关键词： pine breeding Biomass

An improved initial rotor position estimation method using high-frequency pulsating voltage injection for PMSM

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Defence Technology（防务技术） 2024年第3期33卷 19-29页

作者： Yang jiang Ming Cheng School of Electrical Engineering Southeast UniversityNanjing 210096China

High frequency pulsating voltage injection method is a good candidate for detecting the initial rotor position of permanent magnet synchronous ***,traditional methods require a large number of filters,which leads to the deterioration of system stability and dynamic *** order to solve these problems,a new signal demodulation method is proposed in this *** proposed new method can directly obtain the amplitude of high-frequency current,thus eliminating the use of filters,improving system stability and dynamic performance and saving the work of adjusting filter *** addition,a new magnetic polarity detection method is proposed,which is robust to current measurement ***,experiments verify the effectiveness of the method.

关键词： Initial position detection Signal demodulation algorithm Magnetic polarity detection Filter elimination

湿地松材脂兼用林最优轮伐期的经济分析--以江西省景德镇市枫树山林场为例

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林业科学 2022年第4期58卷 62-73页

作者：刘林张旭余素君孙洪刚姜景民王宇华中国计量大学经济与管理学院杭州310018 中国林业科学研究院亚热带林业研究所杭州311400 景德镇市枫树山林场景德镇333000

【目的】我国湿地松材脂兼用林的轮伐期是在用材林数量成熟龄的基础上适当延长得到的。虽然该轮伐期可以取得一定的经济效益,但能否获得最优的经济效益尚缺乏科学依据。本研究通过分析湿地松经营中木材和松脂对经济绩效的贡献,确定采脂... 详细信息

【目的】我国湿地松材脂兼用林的轮伐期是在用材林数量成熟龄的基础上适当延长得到的。虽然该轮伐期可以取得一定的经济效益,但能否获得最优的经济效益尚缺乏科学依据。本研究通过分析湿地松经营中木材和松脂对经济绩效的贡献,确定采脂和采伐的时间节点及其影响因素,为保证湿地松人工林经营效益的最大化和林产品生产的可持续性提供科学依据。【方法】基于江西省景德镇市枫树山林场湿地松人工林生产实践,构建考虑木材和松脂两类产出的Faustmann模型,计算林地期望价值(LEV)。然后:1)通过比较材脂兼用林和用材林的收入现金流,阐明木材和松脂在湿地松人工林收入中的贡献;2)在不同折现率下,对湿地松两类人工林的LEV和最优轮伐期(T*)进行比较;3)设置活立木价格、松脂价格和林分经营成本的变化范围,评估在不同折现率下,LEV和T*对这些影响因素变化的敏感性。【结果】1)经营材脂兼用林的名义现金收入较高,但如果经营时间足够长,湿地松用材林和材脂兼用林的名义现金收入将趋同。虽然松脂收入提高了林分的LEV,但是,木材收入对总的名义收入的贡献将影响LEV的变化。2)湿地松材脂兼用林的T*比用材林的T*长。若其他条件不变,折现率增加,用材林的T*缩短,但材脂兼用林的T*略微延长。3)活立木价格对湿地松用材林的LEV和T*有正向影响,但在木材价格下降时对材脂兼用林T*的影响不明显。松脂价格对材脂兼用林的LEV有正向影响,但对T*的影响不明显,只在高折现率时,价格下降,T*下降。人工成本对湿地松用材林T*有正向影响,对材脂兼用林的T*没有影响。【结论】1)湿地松材脂兼用林比用材林具有更强的创收能力。木材收入对材脂兼用林总收入的贡献是不可忽视的。湿地松人工林经营要以木材和松脂收入总额最大化为目标,采脂的同时要兼顾木材的生长。2)对湿地松人工林进行采脂确实延长了T*。但在当前的价格水平下,如果折现率超过10%,人工林经营将无利可图。因此,低折现率有利于松脂的长期生产。3)材脂兼用林的T*对松脂价格、人工成本和较低木材价格时的变化反应不敏感。从投资的角度看,湿地松人工林的盈利能力主要取决于折现率。折现率对材脂兼用林T*的影响与木材收入占林分总收入的比重有关,比重越高,折现率对T*的负向影响就越大。4)采脂起始时间的确定会影响LEV和T*,当林分接近成熟时松脂形成较多,采脂对林分生长的影响逐渐减弱,最为合适的采脂起始年龄。

关键词：湿地松材脂兼用林最优轮伐期林地期望价值

内侧半月板后根部撕裂与胫骨旋转病理机制和临床关联性的研究进展

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中国修复重建外科杂志 2024年第3期38卷 368-372页

作者：任富继吴疆黄竞敏天津市天津医院(天津大学天津医院)运动损伤与关节镜二病区天津300211

目的总结目前关于内侧半月板后根部撕裂(medial meniscus posterior root tear,MMPRT)的概念、临床表现、诊断、生物力学变化、病理机制及其与胫骨旋转关系的临床关联性研究进展。方法广泛查阅近年来国内外关于MMPRT及其与胫骨旋转关... 详细信息

目的总结目前关于内侧半月板后根部撕裂(medial meniscus posterior root tear,MMPRT)的概念、临床表现、诊断、生物力学变化、病理机制及其与胫骨旋转关系的临床关联性研究进展。方法广泛查阅近年来国内外关于MMPRT及其与胫骨旋转关系的研究文献,并进行总结分析。结果 MMPRT是膝关节内侧半月板损伤的一种特殊且常见类型,患者在低能量损伤后出现的膝关节后内侧爆裂疼痛事件对其诊断具有重要提示。MRI是首选影像学检查方式。MMPRT产生的生物力学效应类似于内侧半月板全部切除,且该损伤通常与胫骨旋转有关,MMPRT诱发了胫骨的病理性外旋,及时修复内侧半月板后根能够恢复这种病理性外旋。同时,胫骨旋转的变化与内侧半月板后根修复后的愈合状态相关。结论 MMPRT与胫骨旋转密切相关,了解二者间的生物力学、病理机制和临床关联性,对于改善MMPRT的诊断和治疗策略具有重要意义。

关键词：内侧半月板后根部撕裂胫骨旋转病理机制临床关联性

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