Table of Content

10 August 1985, Volume 4 Issue 04

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Study on the Ecological Divisions of Tangerine Plantation in Zhejiang Province

Huang Shoubo

1985, (4):  1-4. 

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Zhejiang is one of the major tangerine-planting provinces of China. Based on the mean annual absolute minimum temperature, four ecological regions for the plantation of tangerine (Citrus reticulate)are divided: 1.most suitable,2.suitable,3.ill suitable,and 4.not suitable.According to the frequency of absolute minimum temperature and the orographic,soil and water conditions,eleven sub-regions are further divided.

Study on the Chlorophyl Contents of Artificial Cunninghamia lanceolata Forest

Zhao Jilu, Chen Chuying

1985, (4):  5-8. 

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In this paper, the daily and monthly variations of chlorophyl contents of Cunninghamia lanceolata are determined, and the relationship between these contents in one hand and N-contents in leaves, leave weights, variaties of Cunninghamia lanceolata and latitudes in another hand is studied.

A Preliminary Investigation On the Populations of Microbes in Honghu Lake

Xie Qiming, Jiang Wenxiang, Wan Jiahui

1985, (4):  9-12. 

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The numbers, seasonal changes and physiological groups of heterotrophic and oligotrophic bacteria in waters and sediments of Honghu lake are investigated. Results show that the numbers of heterotrophic bacteria are 30000 organisms穖l^-1 in waters and 660000 organisms穖l^-1 in sediments, and decrease in order of:spring>autumn>summer>winter. In waters and sediments, aerobes are predominant; and in sediments, the numbers of oligotrophic bacteria are greatly larger than those of normal trophic bacteria. From the view point of microbiology, Honghu lake belongs to the oxygenated eutrophic lake.

Ordination and Classification of Forest Communities at Baishilazi Natural Reserves in Liaoning

Li Shaozhong

1985, (4):  13-15,20. 

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Using reciprocal averaging(RA) method,the forest communities of Baishilazi natural reserves are divided into 3 vertical zones and 6 chief types.The distribution of forest communities is mainly controled by altitude.It's considered that according to the different forest types, various forest managements should be adopted.

Studies on the Anti-Pollution Capacity of Flowers

Hu Kaimin, Liu Qingzhen, Li Yongfang, Wang Yeju

1985, (4):  16-20. 

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Simulation studies show that 1. different kinds of flowers possess different anti-pollution capacities to the same polluting gas, and the kinds of flowers possess different capacities to different polluting gases; 2 . the colours of same kinds of flowers have a close relationship with their anti-pollution capacities, i.e., flowers with deeper colour are more endurable than those with light one; 3. little influence of toxic gases is found to the flower and leaf-buds.

Si-Ca Relationship in Plants and Soils

Zang Huilin

1985, (4):  21-24,20. 

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This paper deals with the Si-Ca relationship in plants and soils. According to the ratio of SiO₂/CaO (W/W) in the ash of plants, the plants can be divided into two types: calcicole and siliceous.

Eco-geographic Distribution of Rodents in Liaoning Province

Li Weixian

1985, (4):  25-29. 

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Geographically and ecologically, 10 zoological assemblies may be divided for the distribution of rodents: 4 in eastern hilly region——coniferous and broadleaf mixed forest, broadleave mixed forest, buches with meadow and agricultural grassland; 2 in middle plain region——agricultural grassland and sand dunes with bushes; and 4 in western hilly, region——sparse forest with bushes, arid steppe, flood plain with meadow and agricultural grassland.

Stand Structure of Phyllostachys pubescens and Ecological Effect in Huitong County of Hunan Province

Zeng Derong

1985, (4):  30-32. 

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Determinations of various types of individual and stand structures of Phyllostachys pubescens and their biomasses show that tne succession from mixed forest to pure forest is an inverse one. It induces a simple stand structure, decreasing soil fertility, decreasing biomass and quality of plants and increasing plant diseases and insect pests. Properly reserving some other tree species in Phyllostachys pubescens forest will be profitable to the ecological balance. The best accompanied tree species are deciduous arbores such as Liquedabar formosana and than,masson pine. The best stand structure is bamboo: broadleaf tree: coniferous tree=7:2:1.

An Investigation on the Agro-ecological Structure of Baoan farm in Guangdong Province

Liu Hua

1985, (4):  33-34,51. 

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The Baoan farm in Guangdong province has an integral ecological structure with agriculture, forestry, animal husbandry, sideline and fishery. This structure exhibits a higher transformation rate of material and energy and provides a possibility of fully using natural resources. The present paper analyses the characteristics of this structure and proposes a preliminary program for its improvement.

A Discussion on the Ecological Factors in Hanzhong Tea-Planting Area

Xiao Yon gsui, Hao Xuelian, Fang Xueliang

1985, (4):  35-38. 

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This paper is an attemps to show how the climate, soil and other local ecological factors effect the growth of tea plants and the quality of tea in Hanzhong tea-planting area. Based on the above mentioned factors, which steps ought to be taken to improve the ecological balance for the amelioration of tea gardens in this area are suggested by the authors.

Some Environmental and Ecological Problems in Tourism at Present

Wang Jiaxi

1985, (4):  39-41. 

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Tourism has been developed very rapidly in China and some environmental and ecological problems are induced. The main ones are thought to be: 1. the amounts of sightseers greatly exceed the capacity of some attractive scenic spots; 2. environmental pollutions (air-, water- and noise- pollutions) are induced; 3. inappropriate man-made activities such as reclaiming lands from lakes, quarrying from mountains, establishing inharmonious buildings and destroying vegetations are increased. The capacity of scenic spots and the countermeasures for solving above mentioned problems are discussed by the author.

A Preliminary Study on the Establishment of Suitable Agricultural Ecosystem on the Huanghe-Huaihe-Haihe Plain

Wang Bingren

1985, (4):  42-45. 

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From the viewpoint of ecology and principles of water balance, this article discusses the necessity of establishing suitable agricultural ecosystem on the Huanghe-huaihe-Haihe plain. Based on the investigations of the characteristics of water resources and the water nceds of plants,some proposals for establishing this ecosystem are put forward.

Energy Resource in Countrysides and Ecological Environment

Sun Jiulin

1985, (4):  46-48. 

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The lack of energy resource in countrysides induces environmental deterioration of agricultural ecosystem, and this deterioration is getting serious in our country. Based on the present status of energy shortage in our countrysides and the ecological disturbance induced by it, the necessity of improving ecological balance in countrysides and studying the relationship between lack of energy resource and deterioration of ecosystem is discussed by the author.

Comparison and Evaluation of Coniferous and Broadieaf Trees in Yunnan

Ling Zhongda

1985, (4):  49-51. 

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Although the broadleaf trees in Yunnan have a smaller distribution area and a less wood storage capacity, their vegetation types and kinds are larger than coniferous. And, in comparison with coniferous, broadleaf trees have many merits. Nevertheless, broadleaf trees have been planted less and less over a long period of time.There exists a danger of being perished for them. Therefore, it's necessary to adopt measures to protect and develope broadleaf trees.

The Effect of Lights with Various Wavelengths on the Organic Genesis of Begonia rex-cultorum Bailey in vitro

Ni Dexiang, Zhang Pifang, Zhang Ruping, Dong chongmei, Wang Kaiji

1985, (4):  52-53,8. 

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This paper deals with the effect of light with various wavelengths on the callus growth and bud formation of Begonia rex-cultorum Bailey in vitro. Results show that:l. bud formation and callus growth are inhibited by red and yellow lights; 2. blue light is indispensable for callus growth and bud formation, and the effect of white light and dark is similar; 3. fewer and lighter buds are formed under green light than under blue one.

A Survey on the Common Seabuckthorn(Hippophae rhamnoides) in the Loess Plateau Region

Ma Zhiben, Liu Huanjin, Cheng Yue

1985, (4):  54-55,12. 

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Hippophae rhamnoides is widely distributed in the loess plateau. Its leaves and fruits are used for food by 45 species of birds and 5 species of mammals. In autumn, its ripe fruits can keep on the branches for months. And in winter, under food-lacking circumstances, the fruits can supply food for birds and mammals, especially for a rare bird Crossoptilon mantchuricum. Therefore, Hippophae rhamnoides plays an important role for the ecological balance in the Loess Plateau Region.