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Table of Content

Volume 7 Issue 4
10 November 1991
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A REVIEW ON THE LEGISLATION OF NATURAL RESOURCE CONSERVATION
WANG Li-Qiang, CAO Die-Yun
1991, 7(4):  1-6,35. 
Abstract ( 473 )   PDF (572KB) ( 1295 )  
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The legislative systems on the utilization and conservation of land, forest, pasture, fishery, wildanimal, water, mineral and other natural resources have been systematically reviewed. The basic characteristics of these resources and problems being confronted in China have been separately discussed. In order to solve these problems, a scries of laws and administrative regulations in natural resources conservation have been promulatcd by the central government and some local governments since the foundation of People’s Republic of China. All the related laws and administrative regulations have been deeply and systematically reviewed, with special emphasis on the main articles. 
THE SIGNIFICANCE AND WAYS OF CONSERVING WILD RELATIVES OF CROPS
WANG Xian-Pu, WANG Jian-Ju
1991, 7(4):  7-11. 
Abstract ( 467 )   PDF (410KB) ( 1381 )  
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The conservation of crop genetic resources and their wild relatives is one of the most important issues for human today. This paper mainly deals with following four aspects :1. the formation and development of crops in relation to their wild relatives; 2. the conservation of wild relatives of crops in situ ; 3. the conservation of wild relatives of crops ex situ ; 4. The prospects for conservation of wild relatives of crops.
A STUDY ON THE NATIONAL PROTECTIVE PLANTS IN JIANGSU, ZHE JIANG AND ANHUI PROVINCES
ZONG Shi-Xian, YANG Zhi-Bin, TAO Jin-Chuan, HUANG Zhi-Yuan, HE Shan-An, XUE Da-Yuan, JIANG Ming-Kang, LI Zheng-Fang
1991, 7(4):  12-17. 
Abstract ( 512 )   PDF (408KB) ( 1557 )  
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In the paper, the study on the survival, quantity, ecogeographical distribution, threatened cause, conservation value and conservation measure of the national protecting plantsin Jiangsu, Zhejiang and Anhui provinces was conducted. Theresults obtained provide with an important scientifical basis for the conservation of precious, rare and endangeredplants in the area.
CHARACTERISTICS OF THE RURAL ECO-ENVIRONMENT IN RED SOIL HILLY AREAS AND ITS IMPROVEMENT: TAKING QIANYANZHOU OF TAIHE COUNTY IN JIANGXI PROVINCE AS AN EXAMPLE
LI Lan-Hai
1991, 7(4):  18-22. 
Abstract ( 583 )   PDF (359KB) ( 1319 )  
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Qiangyanzhou, located in Taihe county of Jiangxi province, is a typical red soil hilly area. As a result of long-term extensive management and over-reclamation, serious soil erosion has been induced, and the rural eco-environment has been severely destroyed, With a series of effective measures which include planting trees, developing agriculture at prior position, selecting key products of horticulture and livestock, damming up water and comprehensively development and management of hill, the eco-environment has being gradually improved, the agricultural production is increasingly raised, and the significantly ecological and economical efficiencies have been obtained.
STUDY ON THE ECOAGRICULTURE SYSTEM DEVELOPMENT OF CAOLAOJI SEED FARM IN GUZHEN COUNTY OF ANHUI PROVINCE
DONG Rong, HU Yong-Nian, SUN Xian-Fang
1991, 7(4):  23-26. 
Abstract ( 557 )   PDF (290KB) ( 1244 )  
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According to investigation and analysis on the planting-raising-processing ecosystem of Caolaoji Seed Farm, the development of ecoagricultural system should be made by adjusting ccologic niche, expanding food chain, perfecting ecoagriculture model. The SD model is used as major model. The relevant economic prophesing model and aim programme model are combined into the model. The natural, social and economic resources of the farm are programmed, optimum system structure is sought and plans of ecoagriculture system development is set up. The plan has been practised for two years, the productivity in the system is increased, the ecologic economic benifit is significantly raised. 
EFFECT OF THE RIDGE CULTURE ON THE SOIL ECOSYSTEM IN THE PADDY FIELD
LIU Yun, XU Song-Lin, HE Guang-Zong, HU Xue-Yuan
1991, 7(4):  27-31,49. 
Abstract ( 548 )   PDF (380KB) ( 1041 )  
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Ridge culture experiment in paddy fields have been done in Yichang district for four years.The experimental results were systematically analysed.and effects of ridge culture in paddy field on soil ecosystem were assessed. It is concluded that ridge culture not only protect the valuable moist soil rcsources,but also improve the soil environments. Main technique points for continuous ridge culture were put forward.
PHYSICAL CHARACTERISTICS OF SOIL SURFACE IN INFILTRATION-RIDGED PADDY FIELD AND THEIR SIGNIFICANCES ON FERTILITY
WEI Chao-Fu, CHE Fu-Cai, GAO Ming
1991, 7(4):  32-35. 
Abstract ( 585 )   PDF (284KB) ( 1248 )  
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The physical characteristics of soil surface and their effects on soil moisture, heat, gas and fertility in the infiltration-ridged paddy field have been studied by comparision with the watcrlogging-leveling (conventional) paddy field. The results show that in the soil surface of infiltration-ridged paddy field, soilid, water and gas phases coexist and the rates of material cycle, energy transfomation, water, heat and gas exchanges and soil nutrients metabolism and availability of soil nutrients are higher than those in the watcrlogging-leveling paddy field. It is concluded that the infiltration-ridged paddy field is of high and effective material cycle and energy transformation. 
INTENSIVE FARMING IS THE IMPORTANT WAY FOR INCREASING GRAIN YIELD IN HEILONGGANG REGION
LIU Tie-Bin
1991, 7(4):  36-39. 
Abstract ( 488 )   PDF (281KB) ( 1318 )  
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The adjustment of cropping system and its effect in Qiuzhuang village were analysed. The results showed that the tension of water resources shortage in Heilonggang region can be alleviated by properly reducing grain crops, expanding the area of cotton and orchard, carrying out the comprehensive development of grain, cotton and fruits. The economic income can be greatly raised by increasing the yield of grain and cotton. Intensive farming with high yield had good results of resources utilization.The orientation of cropping system adjustment in this region was also discussed.
APPLICATION OF CONFUSION TECHNIQUE OF THE SEX PHEROMONE IN CONTROL OF ORIENTAL FRUIT MOTH IN FORESRTY ENGINEERING
WANG Zhen-Dong
1991, 7(4):  40-43. 
Abstract ( 536 )   PDF (276KB) ( 1150 )  
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The sex pheromone confusion experiment in the control of oriental fruit moth (Grapholilha moles la Busck) had been conducted in the apricot orchard of Taihengshan Baiguoshu experiment station in Yuanshi county of Hebei province from 1987 to 1988. The experiment sites were 10mu and 20mu in 1987 and 1988 respectively. Eighty bearings per mu with 200Mμg synthetic sex pheromone were used in the field tests. In the check site, pesticide was applied once every year in May for control of oriental fruit moth, no pesticide was applied in the confusion experiments area. The results showed that the rate of prevent mating was 95.5% in 1987 and 95.2% in 1988 and the rate of prevent mating of female moth was 52.5%. The attractive capability of the synthetic area was lower (24.5%) than that (44.7%) in the check area; the rate of fruit injury was 7.1% in the confusion area and 13.9% in the check area. The expenditures on wages and on the chemicals in the confusion control was 80-90% and 20%, respectively, les.s than that in the chemical control area. 
STUDY ON THE TREATMENT OF SOLID WASTE WITH EARTHWORM
HU Xiu-Ren, FANG Tian, LI Guo-Ding
1991, 7(4):  44-49. 
Abstract ( 639 )   PDF (377KB) ( 1426 )  
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Solid wastes from Qtnghuayuan in Beijing were used to raise Eiseniafoctida.which were introduced frctn Haiyang of Shandong province. The effects of earthworm raising container, solid waste composition and its pretreatment state, and environmental conditions on the earthworms have been studied. The results show that under the experimental condition, the average day-weihgt increases of the earthworm are 0.3 of the earthworm weight itself in the inside pot raising and 0.08 in the outside productive raising, the consumed solid waste is 0.7 times of earthworm weight, the average excrete ratio is 0.4, and average hatch rate is 2 earthworm. The experiment indicate that the solid wastes, which contain less than 75% of coal breeze or less than 50% of building wastes by weight, can be used to raise earthworm.
MOVEMNET AND DISTRIBUTION OF 35S-DIMEHYPO IN MODEL TERRESTRIAL-AQUATIC ECOSYSTEM
CHEN Zu-Yi, SHI Ying, HUANG Shi-Le
1991, 7(4):  50-53. 
Abstract ( 498 )   PDF (293KB) ( 1029 )  
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The movement and the distribution of 35S-dimehypo in model terrestrial-aquatic ecosystemwere studied using model ecosystem experimental equipment and radioisotope tracer techniques. In model ecosystem composed of rice plant-soil-water, 35S-dimehypo applied in field water moved mainly by irritating water during the experiment for 58 days.The recovery from soil leakage was 51.39% of dose. 35S-Dimehypo was absorbed by rice roots. The resid ues were 5.94% in whole plant (0.32ppm in shoot and l.lSppm in roots) and 18.48%(about 0.01ppm)in soil .In model ecosystem including water .(collected from soil leakage ) -Azolla (Wolffia arrhiza Wimm) -fish (grass carp, Ctenophryngodon idellus)-sna.\\, high absorption of 35S-dimehypo by Wolffia arrhiza Wimm was found during the experiment for 29 days .The accumulation ratio was 17.67% and higher than those of snail meat (10.47%)and homogenized fish(4.29%). In fish, the accumulation ratio of parts differed :viscera(6.67%) > gill(I.24%) > bone(.1.07%) >meat(0.56%). Very low bioaccumulation appeared.
STUDY ON THE PURIFICATION OF ORGANIC WASTEWATER DISCHARGED BY TOWNSHIP AND VILLAGE ENTERPRISES MAINLY WITH WATER HYACINTH
LI Wei-Xin, YAN Jing-Song, CHEN Jian-Guo, YIN Yu
1991, 7(4):  54-58,43. 
Abstract ( 513 )   PDF (392KB) ( 1529 )  
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The research indicates that the purification of silking wastewater can be strenthened well bythe semi-artificial aquatic ecosystem covered with water hyacinth (Eichhornic crassipes).The purification rates are 95.7%, 92.6%, 96.6%, 86.6%, 79.8%, 90.5% and 88.7% for TSS, BOD5, CODcr, TN, NH4+-N, TP and PO43---P respectively. After this process, the wastewater can be discharged harmlessly. The water hyacinth harvested from the pond can be provided for breeding fish and the economic benefits is signficant. So the environmental, economic and social benefits are well integrated.At last,some key problems of practising and managing the ecosystem are discussed.
STUDY ON CAPABILITY OF THE ABSORPTION OF F BY DIFFERENT MULBERRY VARIETIES
XU He-Bao, WANG Jing-Jiang
1991, 7(4):  59-62. 
Abstract ( 466 )   PDF (274KB) ( 1530 )  
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A series of non-periodical and periodical continuous examinations of F content have been carried out in leaves of 8 mulberry varieties within the same mulberry orchard during spring and autumn silkworm periods from 1984 to 1987. The results show that the capability of mulberry absorption and accumulation of F varies with the mulberry varieties. Among the 8 mulberry varieties, "Husang 32* has the lowest F absorption capability, therefore, it is an excellent variety for raising silkworm. "Jianchi" and ’7311" have the highest F absorption capability, they are inferior varieties for raising silkworm, and the rests arc mediate.
INVESTIGATION AND RESEARCH ON ORGANOCHLORINE (666.DDT) INSECTICIDE POLLUTION STATE IN VEGETABLES AND SOIL NEAR HUHHAT
LIU Sha-Bin, HUANG Ya-Qin, CHAO Ke-Jin
1991, 7(4):  63-65. 
Abstract ( 551 )   PDF (201KB) ( 1270 )  
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In order to find out the pattern of organochlorine content in the edible part of vegetables, the organochlorine insecticide pollution and its degradation in soil and vegetables have been invcrstigated and studied. The results showed that the vegetables and the soil have been polluted in a small scale by the insecticide and the residual organochlorine contents of soil and vegetable are below the national food health standarts. Special attendion should be paid to the possibility of the potential insecticide pollution because of exceeding limit in isolated samples. 
GAS CHROMATOGRAPHIC METHOD FOR DETERMINATION OF TRACE AROMATIC AMINES IN WATER
WU Zhi-Lin, CHEN Jian-Ping
1991, 7(4):  66-69,17. 
Abstract ( 532 )   PDF (322KB) ( 1314 )  
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Gas chromatographic methods for determination of trace aromatic amines in water was reported in this paper. Special methods for extraction and separation of aromatic amines form water samples were described. Cation exchange resin can be used to extract and separate aromatic amines from water with recovery rate of about 85%. In the experiment, aromatic amines were dervvatized with fluorine containing compound, and determined by GC with recovery rates in the range of 83.9 to 94.1%. Becarse of higher resolution of capillery column and high sensitivity of electron capture detector to fluorine containing compound, the detection limits of the method were 20-50 ppt depending upon individual aromatic amine.