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Table of Content
10 February 1985, Volume 4 Issue 01
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Study on the Content of N
2
O and Its Dynamics in Soils
Zhang Fuzhu, Gao Zhengmin, Han Shuhua, Li Peijun
1985, (1): 1-5.
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186
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This paper studies the producing condition of N
2
O and its dynamics in soils with application of various varieties of nitrogen fertilizer (ammonium sulfate, urea and ammonium carbonate). The results show that the gaseous loss of various nitrogen fertilizers in the form of N
2
O is decreased in the order: urea>ammonium sulfate>ammonium carbonate. The denitrification rate in soils with different moisture content and applicated with various varieties of nitrogen fertilizer is declined with time to a similar level. Its variation range is 4.12—7.29%.
Quantitative Classification of Fagus Lucida Forest in Guizhou Province
Zhu Shouqian, Yang Yeqin
1985, (1): 6-12,24.
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1233
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155
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This paper is a preliminary study on the quantitative classification of Fagus lucida forest in Guizhou province by the method of agglomerative analysis and polar ordination. The forest is derided into 3 types. The relationship among the distribution of various types of Fagus lucida forest, the distribution pattern of dominant type and the habitat is studied by the method of gradient analysis.
The Contents of Zn, Cu, Fe and Mn in Grains and Vegetables of Sichuan Province
Wen Yanmao, Cheng Yanao, Yang Dingguo, Jin Aizhen, Ying Yigao, Gao Lan
1985, (1): 13-17.
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209
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The Contents of Zn, Cu, Fe and Mn in rice, wheat, maize, potato and lettuce of Sichuan province are examined by atomic absorption spectrophotometry before the application of trace element fertilizers. The trace element contents in various grains and vegetables are different and related to the available trace element contents in soils. The absorption patterns of these elements in the same kind of grains and vegetables from different soils are similar.
Microbial Groups in Different Soil Types of Reservoir Area in Yantse Gorges
Xia Shufen, Zhang Jiayao
1985, (1): 18-20,38.
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1326
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190
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This paper describes microbial groups in different soil types of reservoir area in Yantse gorges. The total amount of microbes is related to the soil structure and fertility, especially in black limestone soil which contains more organic matter. The ecological distribution of various microbial groups in different soil types is similar. The amount of heterotrophic bacteria is the highest, that of actinomyces and fungi is lesser, and that of nitrifying bacteria is the lowest, The amount of microbes in the upper layer of soil is more than that in bottom layer.
Study on Two Ecotypes of
Apis cerana
Fabricius in Yunnan
Zhang Zhengsong
1985, (1): 21-24.
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1159
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152
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Apis cerana
Fabricius in Yunnan province has two ecotypes: the plain one and the hill one. According to the morphological characteristics, camparing with the plain one, the hill one has longer tongue length, longer hind leg length, more wing hooks, longer forewing length, wider forewing width, larger precubital indices, larger cubital indices and darker abdomen. Besides these, these two ecotypes have different biological characteristics.
Sensibility Test for
Tradescantia paludosa
to
137
Cs
Hou Jialong, Hu Zengmiao, Li Yongqi
1985, (1): 25-27.
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1204
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144
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The sensibility of
Tradescantia paludosa
to
137
Cs is studied with micro-nuclear technique. The results show that the sensibility of pollen matricyte in tradescantia paludosa to absorbed
137
Cs has a definite range: most sensitive in the range of 65-130μμc, ultra-dosage reaction at>130μμc, and non-sensitive at<65μμc.
An Approach to the Relationship Between Vegetation Succession and Flood Calamity in Mountainous Regions of Central Asian Sub-tropic Area—— A Survey Report on the Mountainous Region of Longnan County of Jiangxi Province
Lai Yunjian
1985, (1): 28-30,42.
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158
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Based on the research of historical data about rainfall and floods and recent vegetation succession, the relationship between them is discussed. Some measures for preventing fiood calamities are also put forward.
The application of ecological engineering principles on the economic construction
Qin Shixue
1985, (1): 31-34,50.
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1189
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215
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The assumption of ecological engineering proposed by prof. Ms Shijun has induced much attention among many productive and scientific research institutions. They have been utilizing and obtain favourable efficiency of economic and ecologic efficiency. This paper illustrates the active role of applicating ecological engineering principles on the respects of economic construction, land exploitation and resource utilization in our country, the facts of its being getting mastered by more and more people, and the possibility of establishing models exhibiting chinese features.
Characteristics of Land Ecosystems and Main Aspects of Their Research
Fu Bojie
1985, (1): 35-38.
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1212
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417
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This paper discussed the characteristics of land ecosystems and introduced three main aspects of land ecosystem research. The chief characteristics of land ecosystems are: (1) Land ecosystems are complex ecosystems which have hierarchical structures. (2) Land ecosystems are dynamic systems. (3) Land ecosystems are the most active site of natural processes. (4) Land ecosystems are the basic site of human productive activity.
Feeding Cattles with Herbages and Maintenance of Ecological Balance
Tang Gongzhen
1985, (1): 39-42.
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1090
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178
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The author suggests that under the prerequisite of maintaining ecological balance, animal husbandry can be rapidly developed through fully utilizing natural resources. Heroages can fix such resources as water, heat and nitrogen. Feeding cattles with herbages can supply mankind with food and other products. The manures from cattles can in turn meet the needs of herbages.
Variation of Desert Vegetation and Desertification Process in Ulanbuho Desert
Qiu Mingxin, Liu Jiaqung
1985, (1): 43-46.
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1212
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376
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This paper describes the changes of Ulanbuho region which was a steppe. Owing to the unreasonable human activities, the vegetations were destroyed and the desert formed. The developing process of desertification induces a steady deterioration of natural environment and forms the recent desert landscape of Ulanbuho. In order to prevent the further desertification, some measures are put forward by the author.
An Approach to the Enhancement of Agricultural Ecolomic Efficiency
Zhu Jiaqi
1985, (1): 47-50.
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1169
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202
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Based on the principles of ecolomics, a comprehensive investigation and analysis on the agricultural efficiency is made from the viewpoint of macroscopic economics. The author indicates that agricultural efficiency is not only an economics one, but also an ecologic one, i.e., a unified ecolomic efficiency. The basic ways for enhancing agricultural ecolomic efficiency are discussed in this paper.
The amount of earthworm in soils under artificial Pinus koraiensis forest
Chi Guiqing
1985, (1): 51-51,64.
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311
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Based on the field investigation, the relationship between the amount of earthworm in soils and the age and type of planted forest of Pinus koraiensis is discussed. The author indicates that in order to maintain ecological balance, its necessary to expand mixed coniferous (pinus koraiensis)-broad-leaved forest rather than pure.