• 제목/요약/키워드: China forestry

검색결과 145건 처리시간 0.028초

Six New Faunistic Data of the Tribe Eucosmini from Northeast China (Lepidoptera, Tortricidae)

  • Byun, Bong-Kyu;Yan, Shanchun;Li, Chengde
    • 한국응용곤충학회지
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    • 제45권2호
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    • pp.107-112
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    • 2006
  • 중국 동북지역에서 채집된 잎말이나방과의 꽃애기잎말이나방족을 대상으로 분류동정 한 결과, Semnostola megnifisa (Kuznetsov)가 중국에서는 처음으로 보고 된다. 이 외에 중국 동북지역에서 처음으로 분포가 확인되는 4종(Ancylis badiana (Denis et Schifferm$\"{u}$ller), Blastethia turionella (Linnaeus), Eucosma aemulana (Schl$\"{a}$ger), Sillybiphora devia Kuznetsov) 및 흑룡강성미기록종인 Rhopalovalva grapholitana (Caradja)에 대하여 간략한 외부형태적 특징과 분포, 기주식물정보를 정리하였으며, 성충 및 암수생식기의 특징을 도해하였다.

Modeling Knot Properties for Mongolian Pine in Northeast China

  • Jia, Weiwei;Li, Fengri;Jiang, Lichun
    • 한국산림과학회지
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    • 제97권5호
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    • pp.485-491
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    • 2008
  • This study was performed in 14 unthinned Mongolian pine (Pinus sylvestris L. var. mongolica Litvin) plantations in northeast China. Data were collected on 70 sample trees of different canopy position with diameter at breast height (DBH) ranging from 6.9 cm to 34.5 cm. Diameter and length of knots per whorl below the living crown were studied by different vertical levels divided by relative knot height (RHK) in this paper. Models taking DBH and height to the crown base (HCB) as independent variables were developed to predict knot diameter (KD) in a sample whorl. According to the vertical distribution tendency and range of sound knot length (KLsound), KLsound was modeled as multiple linear function of DBH, KD and relative knot height (RHK). The loose knot length (KLloose) was described as a function of DBH, KD and height above the ground for knots (HK) in a mixed log-linear model. Results from this study can provide abundant knot information so as to describe the knot size and vertical distribution tendency of Mongolian pine plantation.

Impacts of Close-to-nature Management Technology on the Korean Pine Soil Chemical Properties in Northeast China

  • Wu, Yao;Qin, Kailun;Zhang, Jinfu;Li, Fengri
    • Journal of Forest and Environmental Science
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    • 제29권4호
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    • pp.300-306
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    • 2013
  • Based on the guiding ideology of "Close-to-nature forestry", the soil chemical properties of Korean pine (Pinus koraiensis) plantation forest which was early done by canopy gap control were analyzed of Liangshui nature reserve in northeastern China. The results indicated that the nurture of forestry crevice diaphanous tended to improve the soil nutrient contents and significant differences of soil nutrients existed among different levels of soil for the same forest type of Korean pine. At 0< $H{\leq}20$ cm layer, the content of available nitrogen, available phosphorus, available potassium, total nitrogen and total phosphorus in artificial pure Korean pine forest are 640.28 $mg{\cdot}kg^{-1}$, 7.54 $mg{\cdot}kg^{-1}$, 275.91 $mg{\cdot}kg^{-1}$, 1.114% and 0.075%, they all higher than the other kinds of forests and for average 1.1 times, 1.4 times, 1.3 times, 1.6 times and 1.2 times. From the layer of $0<H{\leq}20$ cm to 20 cm < $H{\leq}40$ cm, soil nutrient indicators showed various degrees of decreasing in which organic matter had the greatest decline, decreasing by 170.64% while PH had the lowest decline, decreasing by 4.66%.

Taxonomic Review on the Genus Sciota (Lepidoptera, Pyralidae, Phycitinae) in Northeast China

  • Qi, Mu-Jie;Park, Bo-Sun;Han, Hui-Lin;Bae, Yang-Seop
    • Animal Systematics, Evolution and Diversity
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    • 제30권2호
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    • pp.59-64
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    • 2014
  • Three species of the genus Sciota Hulst, 1888 are recognized from Northeast China: Sciota cynicella (Christoph, 1881), Sciota fumella (Eversmann, 1844), and Sciota adelphella (Fischer von R$\ddot{o} $slerstamm, 1836), of which Sciota cynicella (Christoph, 1881) is reported for the first time from China. This species can be distinguished from congeners by the gray color of basal area, the straight antemedial line and the distinct postmedial line on the forewing; by the stout aedeagus in male genitalia. In this study, a key to Northeastern Chinese species of genus Sciota is presented, and the illustrations of adults and genitalia are also provided.

Analysis on the Causes and Countermeasures of Sino-US Trade Friction

  • Tan, Dan;Shuai, Xiaoyu
    • 아태비즈니스연구
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    • 제7권2호
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    • pp.49-59
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    • 2016
  • The study attempts to investigate the causes of Sino-U.S. trade friction in recent years and provides countermeasures accordingly. The import and export volume of two countries, the product structure of China's export, the 337th Act lawsuits related to China, the industries involved in trade friction, and the G-L Index of Sino-U.S. Products are analyzed in detail. The causes of Sino-US trade frictions are discussed from the aspect of mercantilism and trade protectionism, interest groups and governments' trade policies, Chinese product structure, intellectual property protection in China, and performance of Chinese enterprises in litigation. Based on these, countermeasures are put forward. China needs to implement industrial upgrading, increasing the added value of products, and improving intellectual property protection. A trade friction warning system also needs to be constructed. The Chinese government needs to carry out strategic dialogue and international negotiation.

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Public Exhibition of Important Landscape Planning & Design Schemes in China

  • Xiaochun Sun;Xiaoming Liu
    • Journal of the Korean Institute of Landscape Architecture International Edition
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    • 제2호
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    • pp.199-205
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    • 2004
  • Though Public Participation in the field of landscape architecture in China is still in an initial process, it has brought positive effects. The public exhibition of important landscape planning and design schemes is part of current public participation in China. The aim of it is to seek the opinion of the broad masses. Based upon particular situations in China, this paper analyzes two latest significant cases, public exhibitions of Landscape Design Schemes of Beijing Olympic Green & the Central Zone and Beijing South Axis Road Green Space Planning Schemes, pointing out that media introduction, voting, and feedback are three indispensable sections of Public Participation. The approaches by making full use of public exhibitions to create a partnership in public participation are also examined.

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Induced expression of three heat shock proteins mediated by thermal stress in Heortia vitessoides (Lepidoptera: Crambidae)

  • CHENG, Jie;WANG, Chun-Yan;LYU, Zi-Hao;LIN, Tong
    • Entomological Research
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    • 제48권5호
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    • pp.416-428
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    • 2018
  • To gain an insight into the function of heat shock proteins (HSPs) in insects during thermal stress, three HSP cDNAs were identified in the transcriptome of adult Heortia vitessoides, one of the most destructive defoliating pests in Aquilaria sinensis (Loureiro) Sprenger forests. The open reading frames of HvHsp60, HvHsp70, and HvHsp90 were 1,719, 2,070, and 2,151 bp in length, respectively, and encoded proteins with molecular weights of 61.05, 75.02, and 82.23 kDa, respectively. Sequence analysis revealed that all three HSPs were highly conserved in structure. Regarding the stage-specific expression profiles, HvHsp60, HvHsp70, and HvHsp90 mRNAs were detected in all developmental stages. Regarding the tissue-specific expression profiles, the expression levels of the three HSP genes were different in various larval and adult tissues. Moreover, the expression patterns of heat-stressed larvae, pupae, and adults indicated that HvHsp60, HvHsp70, and HvHsp90 were heat-inducible. In particular, HvHsp60 transcripts increased dramatically in larvae and pupae that were heat-stressed at $40^{\circ}C$ and were upregulated in adults that were heat-stressed at $35^{\circ}C$ and $40^{\circ}C$. The expression of HvHsp70 significantly increased in all of the three different developmental stages at $35^{\circ}C$, $40^{\circ}C$, and $45^{\circ}C$. The expression of HvHsp90 obviously increased at $30^{\circ}C$, $35^{\circ}C$, and $40^{\circ}C$ in larvae and could be induced at $35^{\circ}C$ in pupae and adults. The results suggest that HSP60, HSP70, and HSP90 play a major role in protecting H. vitessoides against high-temperature stress.

Presence of Diverse Sugarcane Bacilliform Viruses Infecting Sugarcane in China Revealed by Pairwise Sequence Comparisons and Phylogenetic Analysis

  • Ahmad, Kashif;Sun, Sheng-Ren;Chen, Jun-Lu;Huang, Mei-Ting;Fu, Hua-Ying;Gao, San-Ji
    • The Plant Pathology Journal
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    • 제35권1호
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    • pp.41-50
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    • 2019
  • Sugarcane bacilliform viruses (SCBV), which belong to the genus Badnavirus, family Caulimoviridae, are an important DNA virus complex that infects sugarcane. To explore the genetic diversity of the sugarcane-infecting badnavirus complex in China, we tested 392 sugarcane leaf samples collected from Fujian, Yunnan, and Hainan provinces for the occurrence of SCBV by polymerase chain reaction (PCR) assays using published primers SCBV-F and SCBV-R that target the reverse transcriptase/ribonuclease H (RT/RNase H) regions of the viral genome. A total of 111 PCR-amplified fragments (726 bp) from 63 SCBV-positive samples were cloned and sequenced. A neighbor-joining phylogenetic tree was constructed based on the SCBV sequences from this study and 34 published sequences representing 18 different phylogroups or genotypes (SCBV-A to -R). All SCBV-tested isolates could be classified into 20 SCBV phylogenetic groups from SCBV-A to -T. Of nine SCBV phylogroups reported in this study, two novel phylogroups, SCBV-S and SCBV-T, that share 90.0-93.2% sequence identity and show 0.07-0.11 genetic distance with each other in the RT/RNase H region, are proposed. SCBV-S had 57.6-92.2% sequence identity and 0.09-0.66 genetic distance, while SCBV-T had 58.4-90.0% sequence identity and 0.11-0.63 genetic distance compared with the published SCBV phylogroups. Additionally, two other Badnavirus species, Sugarcane bacilliform MO virus (SCBMOV) and Sugarcane bacilliform IM virus (SCBIMV), which originally clustered in phylogenetic groups SCBV-E and SCBV-F, respectively, are first reported in China. Our findings will help to understand the level of genetic heterogeneity present in the complex of Badnavirus species that infect sugarcane.

Recent trend of chemical studies of fungicide in China

  • Jiang, Mingliang
    • 농약과학회지
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    • 제6권1호
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    • pp.1-8
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    • 2002
  • Recent progress of several kinds of compounds which have been synthesized or isolated from natural fungi for screening or conducting test as agricultural fungicides as well as some formulations for wood stain and decay control have been reviewed in this paper in China. Comments were pointed for Chinas further research and development of fungicides as well as pesticides.