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Table of Content
10 August 1984, Volume 3 Issue 04
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THE EVALUATION OF ECOLOMIC BENEFITS OF ALDER-CYPRESS MIXED FOREST IN THE LINSHAN COMMUNE OF YANTING COUNTY
He Naiwei, Tang xiaofei
1984, (4): 1-4.
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Based on the survey data, the ecolomic benefits of alder-cypress mixed forest constructed by the Linshan Commune of Yanting county in Sichuan Province were comprehensively evaluated. It was estimated that 525,737 yuan income per year of water-, nutrient- and energy resources and wood products would be supplied by the forest.
LEAD CONTENT IN LEAVES OF WOODY PLANTS AS AN INDEX OF AIR LEAD-POLLUTION STATUS
Zhang Chunxing, Zhang Youbiao, Huang Huiyi
1984, (4): 5-9,23.
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The purpose of this experiment is to indicate the air Lead-pollution status in Shenyang according to the quantitative variations of lead content in leaves of poplar, dryland willow and locust, which are the main tree species most adaptable in this city.Based on the lead content in leaves of above-mentioned woody plants, four regions of Shenyang are classified, namely: seriously polluted, polluted, light polluted and relatively clean regions.
AN ANALYSIS OF PRODUCTIVITY AND ENERGY BUDGET IN WINTER WHEAT FIELD
Dong Zhenguo
1984, (4): 10-14.
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It is shown from the measurement of growth rate and leaf area of wheat and the observation of microclimate in wheat field that there is a close relationship between growth rate and leaf area. In highly productive field, the leave area of wheat is maximum during the period from flowering-to milking stage, After elongating stage, the tolal amount of heat consumption from evaporation in field is larger than that of net radiation
NUTRIENT CHARACTERISTICS OF TROPIC SOILS IN HAINAN ISLAND OF CHINA
Wang Jinghua, Wei Lin, Jing Ke
1984, (4): 15-18.
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In soils under tropical forests, the content of organic matter is about 3—14%, and that of N, P, K, Ca and Mg is related to the soil types and the conditions of weathering and leaching. The nutrient elements are come from precipitation to soils.
A PRELIMINARY REPORT ON THE GEOGRAPHIC DISTRIBUTION OF NATURAL FOREST FOKIENIA HODGINSII (DUNN.) HANRY ET THOMAS IN CHINA
Wang Yongan, Liu Yizhen, Liu Shunchu, Yang Tie
1984, (4): 19-23.
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The central distribution area of
Fokienia hodginsii
(Dunn.)Henry et Thomas in our country is the mountainous district in the south of the Five Ridges. This area has 800-1500m above sealevel and locates in 24?30'-26?30'N and 111?0'-118?0'E. The main mixed tree species are
Tsuga longibracteata
Cheng,
Castanopsis caudata
Franch.,
Bucklandia populnea
R. Br. and
Fagus longipetiolata
Seem.
TO BUILD AN ECOLOGICAL AGRICULTURE IS THE BASIS OF MAKING RICH IN MOUNTAINOUS REGION——A SURVEY OF DRY LAND AGRICULTURE AT XIAOBAOBEITAI VILLAGE
Meng Qingxin, Si Binglian
1984, (4): 24-25.
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This paper introduces a typical experience of making rich through realizing dry land agriculture and getting high and stable yield. The way is to make an allout effort in afforestation and bring about the organic combination of agriculture, forestry, animal husbantry and side occupation gradually, developing them in an all-round way.
HOW TO REALIZE A BENEFICIAL ECOLOGICAL CYCLE——A PRELIMINARY STUDY ON THE CURRENT SITUATION, HISTORICAL LESSONS OF FORMATION AND DEVELOPMENTAL WAYS OF ARID REGIONS IN CENTRAL GANSU
Yang Anmin
1984, (4): 36-40.
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This paper describes the history, current situation, problems and lessons of arid regions in Central Gansu, and puts forward the way out and the direction of their development.
ON THE DEVELOPMENTAL DIRECTION OF TUNG TREE PRODUCTION IN THE AUTONOMOUS PREFECTURE OF WESTERN HUNAN FROM THE VIEWPOINT OF ECOLOGICAL BALANCE
Peng Shilong
1984, (4): 41-45.
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This paper discusses the history and current situation of tung tree production in western Hunan and the relationship between this production and ecological balance, and puts for ward a proposal of extensively managing and raising unit yield of tung tree production to achieve the basic unity of ecological and economic aims.
ANIMALS AND THEIR ROLES IN FOREST ECOSYSTEM
Chu Xi
1984, (4): 46-49.
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A host of animals of all sizes forms an indispensable part of the forest ecosystem. As biotic factors they markedly influence forest patterns and processes. Animals are strongly affected both by the physical environment and by the plant communities with which they associate. The activities of human, deer, cattle, sheep and other large animals result in substantial changes in the forest site. Confining the destructiveness of the activities of human and other animals is giving importance to forest ecosystem.
THE INFLUENCE OF LAND MANAGENIENT ON ENVIRONMENTAL BALANCE AND ITS IMPROVING WAYS——WITH YANGTSE RIVER-HAN RIVER PLAIN AS AN EXAMPLE
Guan Qingtao, Lei Weici
1984, (4): 50-52,58.
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This paper gives a brief introduction to the problems of ecological balance on Yangtse River-Han River Plain and puts forward the improving ways and measures.
FOREIGN COUNTRIES' PHYSIOLOGICAL AND ECOLOGICAL STUDIES ON THE CUMULATION OF ESSENTIAL OIL IN MENTHA
Ji Fengqing
1984, (4): 53-56.
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This paper gives a review about foreign countries' studies on the seasonal and geographical variations of essential oil in
Mentha
, the influence of temperature, humidity, irradiation and cultural conditions, and some physiological and ecological problems concerning the yield and quality of
Mentha
.
GIVING PLAY TO THE ECONOMIC BENEFIST OF RETURNING STRAW BACK TO THE FIELDS WITH THE PRINCIPLES OF ECOSYSTEM
Yu Yanbo, Liu Diliang
1984, (4): 57-58.
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This paper deals with the principles of ecosystem, four patterns of returning straw back to the fields are reviewed.