检索结果-南通市图书馆

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

引用

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 Engelm.***.elliottii)is a resin-producing species grown worldwide for significant economic benefits for wood production.Resin tapping cre-ates a carbon sink at the expense of carbon allocation for growth and consequently,wood production may be reduced.Non-structural carbohydrates comprising starch and sugars stored in plant organs,may serve as intermediate pools between assimilation and utilisation.However,the effect of resin tapping between tree growth and non-structural carbo-hydrates is not well understood.This 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 growth.Twenty one-year-old slash pines were subjected to resin tapping over two suc-cessive years.Non-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 harvest.The results showed that tapping had no significant effects on annual increments.Starch 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 roots.Glucose and fructose were the dominant sugars;sucrose was negligible.Compared 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 sucrose.In 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 concentrations.In contrast to free sugars,which accu-mulated substantially in needles and branches during winter,starch was enriched in the phloem,roots,and current-year needles.The results provide evidence for a localised effect of resin tapping,and highli

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 growth.Here,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 cost-consuming.The 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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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 scales.In 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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

道路交通发展的区域社会-生态效应评估——基于甘肃省的实证分析

引用

甘肃科技 2024年第3期40卷 65-70页

作者：蒋经民苏交科集团股份有限公司规划研究院江苏南京210000

实施道路交通发展的社会-生态效应评估可为区域可持续管理决策和社会经济发展提供有效指导。选取甘肃省为研究区域,尝试在省域层面将道路交通网络和区域社会-生态系统予以关联,运用空间自相关、Person相关性分析、格兰杰因果检验和景观... 详细信息

实施道路交通发展的社会-生态效应评估可为区域可持续管理决策和社会经济发展提供有效指导。选取甘肃省为研究区域,尝试在省域层面将道路交通网络和区域社会-生态系统予以关联,运用空间自相关、Person相关性分析、格兰杰因果检验和景观格局指数等方法,评估道路交通发展的区域综合效应。结果表明:(1)道路交通网络的空间格局呈“东南密,西北疏”的空间特征;(2)道路交通发展对社会系统影响主要为非农业人口数量、城镇化率、输转城乡劳动力数量和医疗床位数增加,以及男女性别比下降;(3)道路交通发展有效促进了区域经济增长和农户脱贫、减贫;(4)道路交通发展对生态系统的影响主要表现为耕地、灌木林地和人工地表的景观破碎化程度增加。

关键词：道路交通网络社会-生态效应格兰杰因果检验甘肃省

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Toxicolological Test of Saponins from <i>Sapindus mukorossi</i>Gaerth

引用

Open Journal of Forestry 2015年第7期5卷 749-753页

作者： Menghao Du Sumei Huang Jinping Zhang Jingwen Wang Lisong Hu jingmin jiang Research Institute of Subtropical Forestry CAF Fuyang China

The study has been carried out to investigate acute oral toxicity, acute dermal toxicity in SPF rats and dermal irritation in rabbits. The result shows: 1) acute oral toxicity test shows that LD50 of saponins from Sapindus mukorossi is 9260 mg/kg (95% confidence interval is 6360 - 13,500 mg/kg) and 7940 mg/kg (95% confidence interval is 4890 - 12,900 mg/kg);2) acute dermal toxicity test shows that LD50 of saponins from Sapindus mukorossi is more than 5000 mg/kg in both female and male Wistar rats;3) dermal irritation test in rabbits shows that the average score of dermal irritation per day of each rabbit is zero after 14 days of continuous dermal irritation. According to the classification standard of toxicity in “Hygienic Standard for Cosmetics” (2002 version), the sample is classified as “practical nontoxic” and “non dermal irritation”. Thus, we can conclude that the saponin extraction from S. mukorossi Gaerth is safe for cosmetics.

关键词： Saponins Acute Oral Toxicity Acute Dermal Toxicity Dermal Irritation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Isolation of Total Saponins from <i>Sapindus mukorossi</i>Gaerth

引用

Open Journal of Forestry 2014年第1期4卷 24-27页

作者： Menghao Du Sumei Huang Jinping Zhang Jingwen Wang Lisong Hu jingmin jiang Research Institute of Subtropical Forestry CAF Fuyang China

The study has been carried out to investigate the effects of single factors such as solvents extraction temperature, times, solid-liquid ration, and the time of extractions on the yields of saponins present in the pulp of Sapindus mukorossi Gaerth. On this basis, an L9 orthogonal design of experiment was adopted to determine the optimal conditions for the extraction of saponins. The factors that influence the extraction of saponins are put in the order of extraction times, extraction time, solid-liquid ration, and the best combination is that the powder of the pulp is extracted with EtOH (solid-to-solvent ratio = 1:8, w/v) for three times at 60°C for 3 hours. Under these conditions, about 1.63 g saponins will be extracted from 10 g raw material. The stability test showed that the Sapindus mukuross saponins can maintain surface activity at water temperature (25°C - 40°C), pH (6.3 - 7.7) and water hardness (50 - 250 mg.L-1). It is proved that Sapindus mukuross saponins are quality non-ionic active agent.

关键词： Saponins Sapindus mukorossi Gaerth Orthogonal Design Extraction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

10年生香椿生长与形质性状的种源变异及选择

引用

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

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Discussion on Role of Forest to Control Agricultural Non-Point Source Pollution in Taihu Lake Basin-Based on Source-Sink Analysis

引用

Journal of Water Resource and Protection 2009年第5期1卷 345-350页

作者： Jianfeng ZHANG jingmin jiang Zhijian ZHANG Qihua SHAN Guangcai CHEN Ying WANG Yonghui XU Harry WU Aljoy ABARQUEZ 不详

Taihu Lake is located at the center of Changjiang delta region, the Lake and its effluent rivers are important water sources for 40 million around inhabitants and rapidly increasing industrial factories in Shanghai, Ji-angsu and Zhejiang. The pollutants originate mainly from acidy rain, home sewage of the vast number of inhabitants, livestock manure, agricultural fertilizers & pesticides applied over fields in the drainage basin, and the industrial sewage. Due to the kinds of pollutants, the Lake water is getting highly eutrophic, with frequent blooms of blue-green algae. Compared with point-source pollutants, diffuse pollution is much com-plicated and difficult to control. Thus combating non-point pollution (NPP) is paid much great attention. Based on analysis on source-sink of NPP in Taihu Lake basin, it is concluded that the function of forests on NPP control is multiple and important by both source reduction and sink expansion. The primary objective of planting trees through constructing forested wetlands and establishing riparian forest buffers is to control soil & water erosion, decrease agrochemicals application, and improve farming conditions in the region of Taihu Lake basin. Moreover forests help to intercept acidy rain, protect streambanks, uptake nutrients, hold up pollutants and provide habitat for wildlife.

关键词： Non-Point Source Pollution Riparian Forest Buffer Zone Source-Sink Taihu Lake

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

南方低山丘陵区彩叶无患子优良种源及家系选择

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：