Loading...
Welcome to Chinese Journal of Ecology! Today is Share:

Table of Content

    10 October 1995, Volume 14 Issue 05
    Computer Analysis of Animal's Calling Sound
    Jiang Shiren, Ding Ping, Shi Qingsong, Zhuge Yang
    1995, (5):  1-7. 
    Asbtract ( 1150 )   PDF (569KB) ( 319 )  
    The method and principle of computer analysis,on animal's calling sound were introduced in this paper.With computer.which was substituted for sound analytic instruments the parameters of sound characteristics could be easily obtained.and this method flexible in the process of sound signal analysis and more covenicent for quantitative analysis.
    Effect of Interplanted Spring Wheat and Corn Mulching on Soil Mlcroorganism Activity and Crop Yleld
    Li Guifang, Wang Yifu, Chen Yuan
    1995, (5):  8-14. 
    Asbtract ( 1228 )   PDF (541KB) ( 206 )  
    Under plastic film unmulching,soil microorganism activity was obviously increased and the amount of bacteria,actinomyces and fungi were increased by 1.5,0.3 and 0.8 times,respectively,in comparison with unmulched treatrnents.There were variations among groups of soil microorganisms.The intensity of respiration and nitrogen fixation was distinctly inhanced;The conversion rate of available nutrients was accelerated and contents of soil available N and P were significantly higher than control plots during seedling stage.It was observed that the development of corn was rapid and total growing period was short.Corn yield per hactare reached 11.4t,which was 18.6% higher than unmulched treatments.
    Experimental Study on the Relationship between Section Form or Shelterbelt and Its Wind Resistance
    Guan Dexin, Wang Shuli, Zhu Tingyao
    1995, (5):  15-19. 
    Asbtract ( 1089 )   PDF (351KB) ( 313 )  
    The characteristics of drag distribution in multi-row shelterbelt related to three kind of section forms were analyzed according to the results of wind tunnel experiments. This provided a basis for constructing wind-resisting shelterbelt by changing it's section form.
    Phytocoenology of Pinus sylestriformis Plantation and Its Management Technique
    Zou Chunjing, Bu Jun, Xu Wenduo
    1995, (5):  20-25. 
    Asbtract ( 1400 )   PDF (477KB) ( 235 )  
    The phytocoenology of Pinus sylvestriformis plantation was studied and the results showed that there was an obvious differentiation in diameter;there were only 63 species in the plantation,where hemicryptophyte was dorminant(39.68%);greeryptophyte was space(only 1.59%),according to the numerical analysis;Simpson diversity was 0.87,Shannon-Wiener diversity was2.96,and evenness index was 0.82. Growth pattern showed that Pinus sylvestriformis was a fast-growing species. In the structure of community,there were tree layer,shrub layer and herb layer,in which the biomass of tree layer was dorminant and took 95.62%in proportion. Based on these,a model of maximum density of Pinus sylvestriformis plantation was proposed,i. e.,logN=1.1686logD+4.5835,and some management techniques and measures such as density management,debranching technique,regeneration felling etc,were suggested.
    Community Features of Tilia-Korean Pine Forest on Northern Slope of Changbai Mountains
    Sun Zhongwei, Zhao Shidong
    1995, (5):  26-30. 
    Asbtract ( 1408 )   PDF (493KB) ( 323 )  
    Based on essential community features and field investigations,his paper discussed the physiognomy,floristic composition,quantitative characters and vertical structure of the Tilia-Korean pine forest.Profile of vertical structure was drawn by further analysing its physiognomy such as first-branch height,crown scope etc. It provided theoretical basis for further research on broadleaved korean pine forest community and biodiversity protection and scientific methods for forest management and long-term development.
    Quantitative Characteristics of Energy Fl ow and Nutrient Cycling in Househol d Ecosystems along Three Rivers in Tibet
    Wang Jian lin
    1995, (5):  31-35. 
    Asbtract ( 1208 )   PDF (416KB) ( 171 )  
    Quantitative characteristics of energy flow and nutrient cycling in household ecosystems along three rivers in Tibet were studied.The results showed that system input and output were low,but the rations of output to input of subsidiary energy,nitrogen and phosphorus were as high as3.87,1.02,and 1.07,respectively.
    Network Perspective Methods for Studying Trophic Dynamics in Ecosystem
    Zhang Xiaoai
    1995, (5):  36-42. 
    Asbtract ( 1118 )   PDF (552KB) ( 218 )  
    This paper introduced a series of concepts and methods of network trophic dynamics in ecosystem ecology.Transfer efficiencies and utilization efficiencies were developed from first principle of thermodynamics and shown to be extensions and generalizations of progressive efficiency to trophic networks.The concept of trophic partitioning of compartment into different trophic levels was implemented through the “ unfolding”of trophic networks according to the past history of energy(matter)within the system,Several indices characterizing trophic structure of the system were also summarized.
    Plant Adaptation to Environmental Pollution and Its Micro-evolution
    Duan Changqun
    1995, (5):  43-50. 
    Asbtract ( 1270 )   PDF (826KB) ( 488 )  
    The overall global-dispersed environmental pollutants,to a certain extent,have been altering natural environment.During industrial revolution,the changing rate,scale and effect ranges are much larger than any other periods among the process of organismic evolution;In the situation of this anthropogenic pollution,organisms in principal would adapt and evolve towards the newly-Renerated environment in stead of the evolutionary model in coordinated development between organisms and physical environment.Rest,arches should be focused on whether today“living beings,having experienced life evolution and passed down gene flow,have the capability to adapt the environment,and how they do it.This paper reviewed plant adaptive effects to pollutants and their differentiation int tolerance.The significance and focal points of research in this area were also discussed.
    Insect-Plant Correlation Under Environmental Stress
    Kang Le
    1995, (5):  51-57,50. 
    Asbtract ( 1271 )   PDF (774KB) ( 533 )  
    A lot of studies have demonstrated that environmental stress has strong effects on insect-plant interactions and population dynamics of insects,This paper reviewed some studies about the effects of drought,nutrient deficits,organism feeding and air pollution stresses on insect-plantinteractions and pest outbreaks.It is important to have a clear understanding how insect-plant interactions are affected by the stresses and how we can control pest outbreak in stressed environment.
    Effective Microorganisms Research and Its Application
    Li Weijiong, Ni Yongzhen
    1995, (5):  58-62,65. 
    Asbtract ( 1452 )   PDF (488KB) ( 975 )  
    The compositions and characters of“EM”(effective microorganisms)as well as the effects of“EM” on plantation industry,animal husbandry and environmental conservation were introduced.At the same time,suggestions about how to develop and apply"EM"nin our country were given.
    Research Progresses in Weed Ecology and Biology
    Xue Guang
    1995, (5):  63-65. 
    Asbtract ( 1200 )   PDF (271KB) ( 190 )  
    Based on the contents of“ Weed Ecology,Biology and Impact”—one of four exchange topics at the First InternationaI Weed Control Congress, held in February 17-21,l992,at Monash university,Melbourne,Australia,recent progresses of research on weed ecology and biology around the world were introduced in this paper.
    Benefit Analysis on Animal Husbandry Scales in Quzhou County
    Cao Zhiping
    1995, (5):  66-69,78. 
    Asbtract ( 1138 )   PDF (319KB) ( 319 )  
    Based on investigation of animal husbandry in Quzhou county,the production scales of fowl, hog and cattle were differentiated respectively. Through analysis of input,output and benefit of different scales,a primary conclusion was drawn out:at the present condition,better production scale for fowl was 8000-10000 hens,and those for hog and sheep were over 30 heads.
    The Method or Fuzzy Vector一Markov Transfer Matrix and Its Use in Ecological lml, act Assessment
    Mao Xianqiang, Yang Jurong
    1995, (5):  70-74. 
    Asbtract ( 1212 )   PDF (518KB) ( 363 )  
    This paper put forward the method of fuzzy vector-Markov transfer matrix for ecological impact assessment.In this method,fuzzy vectors were used to discribe the condition of ecosystem,while Markov transfer matrixes were used to simulate the evolution tendency of ecosystem. So,both complexity and dynamics of ecosystem were taken into account.By this method,decision-makers were able to quantitatively assess the impact of development items on ecological environment.
    Concept of Metapopulation and Its Application in Plant Population Ecology. 1. The Compreheusion and Discrimination of“Metapopulaton”
    Ye Wanhui, Guan Wenbin, Liu Zhengen
    1995, (5):  75-78. 
    Asbtract ( 1337 )   PDF (335KB) ( 185 )  
    Since Levins(1969)proposed the term of Metapopulation,in sense of multiple,separate,local population linked by some level of genetic interchange,or a population of populations,it has become very popular in contemporary population biology.But in 1979,J.White also used the word“ metapopulation”for the sum of various component parts,with reference to morphological construction of a modular organism,And this usage of White's Metapopulation has been accepted and applied by some plant demographers,So that,there are two different intensions of the term“Metapopulation”,which cause confusions in population biology.This paper discussed and analyzed these intensions and discriminations, and suggested that the term of Levins can be used forever;the definition of white's can also be used,but the word“Metapopulationl”,he used must be given up,and it would be better to use“Metameric population”instead of it.According to the comprehension of the two terms,we can easily distinguish them.