Table of Content

10 February 1996, Volume 15 Issue 01

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Variant Regulations of the Biomass and Its Allocation of Chinese Fir Plantation

Qin Jianhua, Jiang Zhilin

1996, (1):  1-7. 

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The major facts influencing on the biomass and its allocation of Chinese fir plantation are discussed in this paper. Based on site classification, the growth curres of the biomass of the plantation are presented. The average biomass ratios of different organs of the trees in central and marginal distribution regions and the living mulch and forest litter over the tree biomass are summed up.

Study of Natural Conditions and Ecological Physiology Characteristics for Growth of N. flagelliforme in Qinhai Province

Diao Zhimin

1996, (1):  8-13. 

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The natural conditions and ecological physiology characteristics of Fahtscai (Nostoc flagelliforme Bron et Flah.) growing in 14 counties and one city of Qinghai province were reported in this paper. The research showed that N. flagelliforme grows in dry desert steppes with arid or semiarid continental climate. The soil on which N. flagelliforrne could grow well is the calcic sierolem and light chestunt soil developed from loess mother material during the quaternary period. The soil has strong alkaline reaction, with plenty of calcic deposit. In morphiology and physiology, N. flagelliforme showed strong xerophilous ecological adaptability, including drought-resistance, barren-endurance, addiction to sunshine, calcium and alkal as well as adaptation of temperature variation. The growth of N. flagelliforme exhibited an obvious water rhythm phenomenon.

A Study of the Halophiious Vegetation on the Islands of Zhejiang Province (Ⅰ) Basic Characteristics of the Vegetation

Chen Zhenghai, Tang Zhengliang, Zhang Xiaohua, Ye Guohui

1996, (1):  14-19. 

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The halophilous vegetation is composed of halophytes and some plants with saline tolerance and belongs to the intrazonal vegetation. It is very poor in flora and complex in geographical elements. There are about 203 species of wild vascular plants belonging to 43 families and 134 genera. Among them 133 genera of seed plant can be divided into 13 areal-types. The cosmopolitan genera and species are dominant. It is relatively rich in littoral flora and halophytes. The physiognomy of the halophilous vegetation is sparse and low, the seasonal variety of aspect is obvious, and the layer structure is simple. The distribution and succession are closely related to the ecological factors and show obvious regulation. The succession is caused by the changes of the moisture, salt and humus content of soil and is exodynamic.

Study of the Ecological Dominance of Insect Communities in Apple Plantations

Li Jianrong, Shi Waneheng, Liu Xu

1996, (1):  20-23. 

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The ecological dominance of insect communities in apple plantations were measured in the paper. The application of ecological dominance in insect communities structure and succession; relation and difference of ecological dominance, species deversity and community evenness were studied.

Potential and Countermeasure of Agricultural Production in Haicheng City,Liaoning Province

Zhang Weidong, Liang Zhijie, Liang Wenju

1996, (1):  24-27. 

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The production potential of different types of agro-ecosystems in Haicheng city was analyzed. Results suggested that the lower crop yield in eastern hilly region was associated with the loss of soluble nutrition and water. The lower Nand P₂O₅ transfer flux limited full play of production potential in plain areas. The countermeasure to promote agricultural production potential was proposed on the basis of corresponding transformation of structure efficiency.

Comprehensive Evaluation of Ecological Adaptation of Soybean Cultivars

Chen Jiemin, Zhao Jiuzhou

1996, (1):  28-31. 

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The ecological adaptation of soybean was discussed by means of the relational analysis of the grey system theory aeeording to soybean yield and its charaeteristics. The results showed that the relational coefficient and grade of grey system theory was the most practical parameter. Using a proportion value of ecological and produetion characters to production as a base for characteristics selecting on soybean breading is a good and practical method.

The Uninteresting Growth of Crops and Economical Principle of Living Beings

Zhao Faqing, Zhu Bifeng, Ma Haiyan

1996, (1):  32-34. 

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Sheng's concept of crop growth tediousness, namely uninteresting growth may be defined as various expanded developmental situations of living systems at different levels (individual, population or community), resulting in the departure from the biosystems steady-states by which men can benefit most. This definition has coordinated the essential concepts of "growth tediousness" with economical principle of living beings. Three aspects in relation to the study of growth tediousness and two points which must be considered before using the concept of "growth tediousness" to guide agricultural activities are discussed.

Research Advance of Urbanization and Its Effect on Urban Eco-Environment

Shi Zuomin, chen Tao

1996, (1):  35-41. 

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On the basis of introduction of urbanization and its mechanism and developmental trend, the paper summarized the main research advance at home and aborad in effect of urbanization on urban eco-environment from the point of view of research of urban land use and urban ecosystem. The developmental trend in the future is prospected.

Research Advance of Batch Culture of Freshwater Rotifers

Wang Jinqiu, Pan Liande

1996, (1):  42-50,63. 

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Batch culture of more than ten species of freshwater rotifers was studied by external scientists. The researches of the effects of major ecological factors, including temperature, food, illuminative period, pH, vitamin and nutritive salt etc,on the population growth and ecology of rotifers lay a foundation for the batch culture. Alot of methods of hatch culture were studied. The highest production gained under laboratory conditions and in small container is 1-2 kg. m^-3. d^-1 for Brachionus calyciflorus and 18 kg. m^-2. d^-1 for Philodina acudicornis odiosa (notplanktonic species). The highest yield in large scale production of the former species is 0.2 kg. m^-2. d^-1. Further researches on suitable species of rotifers and its foods, ecological foundation and technology for batch culture are badly needed.

Eco-Environmental Disasters and Their Developmental Tendency in Hunan Province

Xiao Zixin

1996, (1):  51-56,60. 

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The paper dealt with the characteristics and conditions of eco-environmental disasters including soil erosion, forest degeneration,shortage of water resources, environmental pollution in Hunan Province. The systematic analysis indicated that the ecological .environment in the province had been improved in part, but deteriorated as a whole. The eco-environmental disasters will become serious from 1995 to 2000 in the province. Among four kinds of eco-environmental crises, the pollution of "three waster" is the most serious and an important cause of natural disasters. The countermeasure of preventing and reducing the eco-environmental disasters is put forward.

Correlations of Tea Quality with Altitude and Ecological Factors

Wang Chunyuan, Rong Guangming

1996, (1):  57-60. 

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The correlations of tea quality with altitude and ecological factors on Dabie mountain, Yuexi county, west Anhui were analysed in the paper. The results showed that there was parabolic correlation between tea quality and altitude. The dominant ecological factors of contributed to tea quality were lower temperature, higher relative humidity arid much cloud and vapour in high altitude.

Study of Scientific Composition of Culture Material of Pleurotus ostreatus Growing in Vinegar Waste

Zhang Yufen, Bai Zhiming, Zhao Zhonghua, Zhang Fuyuan

1996, (1):  61-63. 

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By means of relational analysis of grey system theory and variance analysis, the primary factor influencing on yield of Pleurotus ostreatus growing in vinegar waste were studied. The results indicated that seed quantity was the most primary factors while the composition of bran was secondary and the carbamide content had no markble influence. On the basis of analysis above, the suitable composition of culture material should be consist of 80% of vinegar waste and 20% of bran,with 1% of phosphate fertilizer, 2% of gypsum powder and 3% of lime powder and the seed quantity is 20%.

Hydraulic Transport of River Network-Oncomelania

Li Damei

1996, (1):  64-66. 

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Oncomelania is middle-parasitizeder of schistosome. The diffusion of Oncomelania will lead spread of schistosomiasis by rivers. Oncomelania has two types: mountainous and river network. It has major significance on controll of diffusion of schistosomiasis to study of hydraulic transport of river network-Oncomelania. The present research has found that river network-Oncomelania spreaded with current through three ways: suspended load transport; bed load transport and transport with floating drift. The results indicated that the main long spread way of river network-Oncomelania was transport with floating drift.

Extraction and HPLC Determination of LAS in Water and Soil

Ou Ziqing, Jia liangqing, He yaowu, Sun Tiehang, Shang Deshu

1996, (1):  67-71. 

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Linear alkylbenzensulfonate (LAS) in water and soil samples was extracted by solid phase extraction (SPE) and methanol/supersonic method, respectively. The extracts were then analysed directly on HPLC with a diode array detector. The average recovery of LAS in water was 94.5% with relative standard deviation (RSD) of less than 2%. The average recovery LASin soll was 73.0% with RSD of 1.14%. These results indicated that both methods with high recovery and accuracy were suitable for environmental monitoring and study of LAS. In addition, both methods are easy operated with less time consuming and less solvent consumption.

The Formation, Reclamation and Sustainable Use of Huanghe Delta

Yao Zhigang, Gu Fengtian

1996, (1):  72-74,7. 

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The process of formation of the modern Huanghe delta was generalized first. Based on the results of present research, the lessons about the irrational reclamation in the past, which led to saline soil and to worse environment were discussed. Finally, the ecology principle we should obey and necessity, feasibility and the countermesure of continuing to develop reclamation were dealt with.

Ecological Environment of Wetland

Liu Houtian

1996, (1):  75-78,71. 

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Some aspects of ecological environmental of wetland were briefly reviewed, including wetland hydrology, wetland soil and wetland ecology.