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    10 August 1995, Volume 14 Issue 04
    Remote Sensing Analysis on the Heat Effects of Coastal Shelterbelt System
    Wang Shuli, Jin Changjie, Guan bexin
    1995, (4):  1-5. 
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    The satellite remote sensing analysis showed that visible albedo and vegetation index of coastalshelterbelt system were between those of the sea and forest.Surface temperature of the systemwas the highest among several kinds of surfaces at 8: 30. At 14 : 00 its surface temperature andtemperature difference were between those of the sea and forest.
    Application of Microecological Engineering in Eco-Animal Husbandry
    Li Weijiong, Ni Yongzhen
    1995, (4):  6-9,14. 
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    The shortage of high protein feed resources,excessive use of antiblotic substances and pollutionmade by animal dungs are serious problems that limit the sustained development and preductionof China's eco-animal husbandry,This paper discussed the application of micro-ecologicalengineering technique to solve these problems and suggested some useful theories and approaches.
    Influence of Forest on Flood Runoff at the Southwextern Part of Xiaoxingan Mountains
    Zhang Qingfei, Zhou Xiaofeng, Wang Chuankuan
    1995, (4):  10-14. 
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    The influence of forest on flood parameters in the upstream of Hulan River at the soutbwesternpart of Xiaoxingan Mountains in Heilongjiang province were studied using 17-year series of forestand hydrological data. The results showed that forest reduced floed runoff discharge,and sloweddown flood peay's sharp rise and decline. The effect in terms of unit stock volume is greater thanthat of forest coverage. However,forest influence has its limits.Maximum flcod peak runoffdischarge are determined mainly by maximum storm precipitation,not the forest.The resultsmay serve as reference for precisely recognizing flcod reducing effect of forest and effectivelymanaging flood-prevention forest.
    Different Cutting intensities and Incidence of Forest Discases in Broad Leaved-Korean Pine Forest of Changbai Mountain
    Yuan Zhiwen, Wang Qingli, Dai Limin, Zhong Zhaokang, Zhao Min
    1995, (4):  15-18. 
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    The effects of different cutting intensities in broad leaved-Korean pine forest on species,composition and incidence of forest diseases were investigated. The results showed that the number of pathogen species was reduced,but disease incidence was intensified with increasing intensity of forest cutting,The incidence indexes of three kind of typical diseases,compared with those in natural forest,were slightly increased in the forest by 30%cutting,but increased by 3.5-5. 6 times in forests by 60%cutting.There are no distinct changes in species composition and types pathogene in different cutting intensity forests.
    Relationskips Betwesn Forest Litters and soid Macrofauna in Wuhu Municipality
    Qian Fusheng
    1995, (4):  19-24. 
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    Soil macrofauna in forest litters of five forest types were investigated from April to May of 1994. The quantity and community composition of soil macrofauna were reported and relationships between forest litters and soil macrofauna were analysed.The results showed that the quantity and species composition of soil macrofauna were closely related to the kind, thickness,amount and decomposition rate of forest litters, which were significant for strengthening the management and protection of forest resources,and advancing the better cycling of forest ecosystem.
    Functional Analysis of Newly-Built Orange Orchard Agro-Ecolomic System in Zhadian Town, Yunnan Province
    Li Yuan, Zu Yanqun
    1995, (4):  25-29,40. 
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    Based On comprehensive investigation and analysis of the structure,matter flow,energy flow and value flow in the newly-built orange orchard ecolomic system in Zhadian town,Yunnan province,the existing problems of system structure and function were revealed, and development measures for readjusting system structure and improving system function were put forward:(1)increase the cultivation of tobacco,rnaize,white bean and other crops;(2)strengthen stock-raising,especially chicken;(3)develop biogas and improve beneficial cycling of the system.
    Application of Water Hyacinth to the Removal of Heavy Metals from Electroplate Waste Water
    Li Weiping, Wang Jun, Li Wen, Wang Junchu
    1995, (4):  30-35. 
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    The ability of water hyacinth for accumulating heavy metals,such as Cu,Zn,Ni, Cr inelectroplate waste water and its effects on water environmental factors were studied through staticand dynamic experiments. The results showed that water hyacinth had significant accumulatingand purifying functions. Under dynamic experiment, average quantity(mg穔g-1,dry)ofaccumulation in a 24hr-peried was Cu:135. 09 Zn:436.58 Ni:50.29 Cr:89.14. The static studyindicated that the ability of water hyacinth for accumulating heavy metals was significantlydifferent under the same initial concentration of different heavy metals, in the sequence of Cr>Cu>Zn>Ni.pH values of Cu, Zn,Ni and Cr were 5,6, 6 and 3,respectively,at whichmaximum accumulat ion quantity was detected. The restraining functions of organic substanceswere the most significant under BOD5<60(mg穕-1). In addition, it was found that cultivationdensity of water hyacinth had no significant effects.
    Development of Ecotourism in Natural Reserves of China
    Yuan Xingzhong, Liu Hong, GaoTiangang
    1995, (4):  36-40. 
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    Based on the concept of ecotourism and present status of natural reserves in China,thesuporiorities and basic principles for developi ng ecotourism in natural reserves were put forward. According to the principles, natural reserves in China were divided into six ecotourism types.They were:(1)forest ecotourism areas;(2)grassland ecotourism areas;(3)desert ecotourismareas;(4)terrestrial wetland and frcsh water ecotourism areas;(5)ocean and coastal ecotourismareas;(6)ecotourism areas of paleontological fcssil sites.
    Classification of Agroecological Patterns in Huanghuaihai Area
    Qi Xinshan, Hu Jingan
    1995, (4):  41-47. 
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    Based on an overall discussion of classification metheds and principles of Chinese agroecologicalpatterns,and using the methed of 4-grade classification, a preliminary classification scheme andcharacteristics of agroecological patterns in Huanghuaihai area were illustrated in this paper.
    Review of Allelopathy Research of Antbrosia Genus
    Wang Dali
    1995, (4):  48-53. 
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    This papor gives a review of allelopathy studied of some imporiant weeds includ Ambrosia artemisiifolia,A. trifida,A. psilostachiya DC. and other species of Ambrosia genus, All these weeds play an imporiant role in the succession of natural vegetation. Meanwhile, an outline of their chemical components and main allelochemicals is also presented in the paper.
    Conservation and Amelioration of Artemisia ordosica Rangeland
    Wang Qingsuo, Chen Zhongxin, Shi Zhenying
    1995, (4):  54-57. 
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    This paper dealt with the conservation and amelioration of deteriorating and deserrifing rangeland from aspects of enclosing, reclamating,cliping and planting forage grasses in Artmisza rodosica rangeland.
    On Researches of Landscape Dynamic Change
    Sun Zhongwei
    1995, (4):  58-62. 
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    Landscape dynamic change is the change of spatial structure of landscape. This paper discussed the types of landscape dynamic change, stability,spatial analysis methods and simulation medels, and attempted to probe into the theoretical framework of landscape dynamic change and methedology for its research.
    Analysis of the Strain-Recovery Courses in Rice Seedlings Under Low-Normal Temperature
    Li Taigui, Shen Bo
    1995, (4):  63-66. 
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    By analysing dynamic changes of the length of green leaves under low temperature and during recovery at normal temperatures,a negative correlation between upper and lower leaves was revealed,and simple mathematic equations were established. According to these equations,lower leaves were supposed to be the receptor of cold stress,and played regulatory role in cold strain-recovery courses.
    A Black Box Model of Rainfall-Surface Flow Relationskip in Xiaoliang Experimental Station, Guangdong Province
    Zhou Guoyi, Yu Zuoyue, Peng Shaolin
    1995, (4):  67-72,62. 
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    There are two kinds of hydrological analysis,i.e.,structural imitation model which cares forinner laws of hydrological process and black box medel which discusses the relationship betweeninput and output no matter how water moves in the system. Based on the gray system theory,this paper attempted to establish black box medels of rainfaoo-surface flow relationship in threedifferent types of catchments on coastal highland of Xiaoliang Experimental Station.Thesemodels were: GM(2.1)models of one-time rainfall(mm)to surface flow(mm)and GM(2.1)models of monthly rainfall(mm)to surface flow coefficient in three catchments. Based on thetests over a long time peried, it has demonstrated high accurancy for prediction of surface flowthrough rainfall by these medels.
    Definition and Classification of Wetlands
    Liu Houtian
    1995, (4):  73-77. 
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    The definition and classification of wetlands were reviewed, and some problems of wetlands in China were discussed.