Loading...

Table of Content

    10 August 2004, Volume 25 Issue 04
    论文
    Collecting and Efficiently Utilizing of Undercurrent Water inSmall-scale Watershed in North China
    HAO Wei-ping, MEI Xu-rong,YAN Chang-rong(Institute of Agricultural Environment and Sustainable Development, CAAS,Beijing 100081)
    2004, 25(04):  . 
    Asbtract ( 8089 )  
    Related Articles | Metrics
    The cistern structure feature of collecting undercurrent water was described. Based on the analysis of water resource feature in the BaiMaHe watershed and feasibility of utilization of undercurrent water collected, Water saving irrigation technologies as main utilization methods were presented and application result and model were discussed, so as to provide reference for comprehensive developing and utilizing water resource in similar watershed in the dryland farm area in North China.
    Effects of Different Irrigation Treatments on Root Growth andWater Use Efficiency of Upland Rice
    ZHAO Jun-fang~1, YANG Xiao-guang~1, CHEN Bin~2, WANG Hua-qi~2,WANG Zhi-min~2, B.A.M Bouman~3(1. College of Resource and Environment, China Agricultural University, Beijing, 100094; 2. College of Agronomyand Biotechnology, China Agricultural University; 3. International Rice Research Institute)
    2004, 25(04):  . 
    Asbtract ( 8476 )  
    Related Articles | Metrics
    The field experiments were conducted to examine the effects of different irrigation treatments on the root growth and the water use efficiency of upland rice. The results showed that the most root dry weights of upland rice were distributed within 0~30cm soil layer. The less the irrigation obtained and the stronger the water stress had, the more roots distributed under 30cm soil layer. The decrease degree of yield and grain per ear by treatment of limited irrigationⅡwere the smallest compared with the full irrigation treatment. The treatment of limited irrigationⅡwas with highest water use efficiency and recommended as one of the reasonable irrigation alternative for upland rice in Beijing region.
    Analysis of Ecological Climate Adaptability and PlantingDivision of Oilseed Rape in Gansu Province
    ZHANG Hui-ling~(1,2), DENG Zhen-yong~1, YIN Xian-zhi~1,GOU Hai-ying~3, WEI Yu-guo~2, YANG Xiao-ling~2(1.Lanzhou Institute of Arid Meteorology, Chinese Meteorological Administration, Lanzhou730020, China; 2.Meteorological Bureau of Wuwei; 3.Meteorological Bureau of Qingyang)
    2004, 25(04):  . 
    Asbtract ( 9377 )  
    Related Articles | Metrics
    The physiological characters and required ecological climate conditions of oilseed rapes, including spring oilseed rape (Brassica napus L.), spring and winter oilseed rape (Brassica campestris L.), in Gansu Province were statistically analyzed. The indices for the suitable planting division of oilseed rape were determined. The oilseed rape planting in Gansu Province was divided into five zones. According to the characters of the ecological climatic resources and the growth of oilseed rape in the different planting zones, the measures to enhance the utilizing efficiency of the ecological climatic resources for oilseed rape production in Gansu Province were put forward.
    Climate Adaptation and Planting Division of TropicalFruits in Guangxi Province
    LIU Liu~1, GAN Yi-zhong~2(1. Guigang Meteorological Bureau, Guigang 537100, China; 2. Guangxi Meteorological Bureau)
    2004, 25(04):  . 
    Asbtract ( 7768 )  
    Related Articles | Metrics
    The ecological climate indexes for the planting of the tropical fruits such as Litchi (Litchi chinensis L.), Longan (Euphoria longan L.), Mango (Mangifera indica L.) and Banana (Musa nana L.), and its planting division were analyzed. The corresponding planting measures were put forward to improve the production of these fruits in the Guangxi Province.
    Influence of Climate Conditions on Growth of Konjak (Amorphophalluskonjak) and Regional Assignment of Its Planting in MountainAreas of Guizhou Province
    TONG Bi-qing, WU Jun-ming(Guizhou Meteorological Center, Guiyang 550002, China)
    2004, 25(04):  . 
    Asbtract ( 8827 )  
    Related Articles | Metrics
    According to the characters of growth and development of konjak (Amorphophallus konjak) and its requirements for the meteorological conditions, the climate resources for konjak cultivation in Guizhou Province were evaluated. The regional climate assignment for the konjak planting was worked out by using the theory and method of fuzzy mathematics. The suggestions to develop and utilize the climate resources and applicable agro-meteorological techniques to obtain high yield, good quality and high efficiency in the konjak production were put forward.
    Quantitative Analysis and Evaluation of Regional Agro-climaticResources Based on GIS
    LIN Xiao-song(Department of River and Sea, Chongqing Jiaotong College, Chongqing 400074, China)
    2004, 25(04):  . 
    Asbtract ( 8071 )  
    Related Articles | Metrics
    The quantitative index and calculating method of the integrated quantitative analysis for the regional agro-climatic resources were studied. The database of agro-climatic resources in the grid-system base on the ArcView GIS was established to improve the precision of data. Taking Chongqing region as an example, the indices of radiation, heat, water, and the integrated index (C_r), the configurable index (C_f) and effective index (C_e) were calculated. The regional agro-climatic resources at the county level in the Chongqing region were quantitatively analyzed and evaluated.
    Research Progress on Crop Water Status Monitoring Based on Stem Diameter Variation
    ZHANG Ji-yang, DUAN Ai-wang, MENG Zhao-jiang, LIU Zu-gui(Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China)
    2004, 25(04):  . 
    Asbtract ( 8084 )  
    Related Articles | Metrics
    The research progress on crop water status monitoring based on stem diameter variation was reviewed in this paper. The research on crop water status monitoring based on stem diameter variation had experienced two stages since the 1960s. At the first stage, a qualitative approach was used to describe the relationship between stem diameter variation and crop water potential. The dynamic analysis was developed to quantify the stem diameter variation with crop water potential taking account of environmental and plant growth conditions at the second stage. The results on crop water monitoring via computer system could be used to guide the irrigation timing under the field and greenhouse conditions.
    Analysis of Dry Matter Accumulation of Winter Wheat on Loess Plateau of Long Dong
    ZHANG Mou-cao~(1,2), DENG Zhen-yong~1, ZHAO Man-lai~3, HUANG Bin~2(1.Institute of Arid Meteorology, Chinese Meteorological Administration, Lanzhou 730020 China; 2. Xifeng Agro-meteorologicalExperiment Station; 3. Department of Computer Science, Longdong College)
    2004, 25(04):  . 
    Asbtract ( 8346 )  
    Related Articles | Metrics
    The dry matter accumulation of winter wheat in the different climate year types on Loess Plateau of Longdong was analyzed with Logistic growth curve. The results showed that the accumulation of dry matter had a linear increase from jointing to milky ripe stage. The biggest accumulating rate occurred around the heading period with a one-peak curve. The amount of dry matter accumulation in the different climate year types was significantly (P=0.01) related to the precipitation, radiation hours and accumulated temperature (≥0℃), whereas accumulating rate was significantly related to the climate factors only in the climate year type with less precipitation.
    A Study on the Agricultural Potential Land Productivityin the Northwestern Shandong
    SHAO Xiao-mei~1,Liu Chun-ling~2(1. Institute of Agricultural Environment and Sustainable Development ,Chinese Academy of Agricultural Sciences,Beijing 100081;2. Department of Resources & Environment, Shijiazhuang College)
    2004, 25(04):  . 
    Asbtract ( 8383 )  
    Related Articles | Metrics
    By using spatial database of 1:50000 soil type map and attributes databases including meteorological data, soil properties data and statistical data on agriculture, effective coefficients for factors such as radiation, temperature, water, land resources and social factors were decided. Then, agricultural potential land productivities were computed by using relevant computing models of mechanism methodology and mapped based on geographic information system(GIS) in this paper. Results indicated that the mechanism methodology could reveal well the regional heterogeneousness of potential land productivity and spatial distribution of agricultural resources among different counties. Moreover, the results showed different limitations of radiation, temperature, water, land resources and social factors to agriculture production.
    Influence of Meteorological Disaster on Paddy Rice Productionin Southeast Guizhou Province
    CHI Zai-xiang, BAI Hui, Luo Shun-zhen, Shi Hong-hui(Meteorological Bureau of Southeast Guizhou, Kaili 55600, China)
    2004, 25(04):  . 
    Asbtract ( 8366 )  
    Related Articles | Metrics
    The intensity indices of meteorological disasters in the Southeast Guizhou Province were statistically calculated. The impacts of these meteorological disasters on paddy rice production were analyzed. Spring cold, spring drought, June's drought, flood and autumn wind are the main meteorological disasters which affect paddy rice production significantly. The strategies for the disaster reduction were put forward.
    A Study and Application on Prediction Method ofWeather-climate Sign
    WAN Zhi-chen, WAN Li-fang(Meteorological Bureau of Nong'an County, Nong'an 130200, China)
    2004, 25(04):  . 
    Asbtract ( 8159 )  
    Related Articles | Metrics
    The prediction method of weather-climate sign was studied and applied in the weather forecast. The method realized earlier forecast with higher accuracy and was easier to apply. It is of importance to improve the quality of weather forecast and to guide the disaster reduction in the agricultural production by applying this method.
    A study on Climate Adaptation and Strategies ofGreenhouse in Tianshui Region
    XU Yan-ping~1, YAO Xiao-hong~1, PU Yong-yi~2, PU Jing-yong~1, HU Li-ping~1(1.Tianshui Agro-meteorological Experiment Station, Tianshui 741020,China;2.Tianshui Meteorological Bureau)
    2004, 25(04):  . 
    Asbtract ( 8609 )  
    Related Articles | Metrics
    The experiment results showed that the average air temperature was between 13.3℃ and 16.6℃, the earth temperature of 0 - 20cm between 13.1℃ and 17.0℃ and the relative humidity between 69% and 89% during the crop growing period in the solar greenhouse in the Tianshui region,Gansu province. The worst radiation and temperature conditions appeared in January, while the average air temperature in solar greenhouse was 8.9℃ (08 - 09h) ~17.2℃ (13 - 14h) and the earth temperature of 0 - 20cm was 11.2℃ (09 - 10h) ~ 14.5℃ (17 - 18h). The average radiation density in the two weeks before and after the winter solstice was 2.33×10~5 Lux. The climate conditions in the solar greenhouse could meet the needs of growth of thermophilous vegetable crops under the conditions of clear day in winter. Based on the analysis of different types of climate conditions in the solar greenhouse and the calculated radiation and temperature productivity of crops, the disadvantage of climate factors for vegetable planting in the growing period was identified, and the improving management measures were put forward.
    Distribution Characters of Actual Evaportranspiration onCrop Fields in Western China
    MAI Miao~1, QIU Xin-fa~1, ZENG Yan~2(1.Department of Geography, Nanjing Institute of Meteorology, Nanjing 210044, China;2.Institute of Geographic Sciences and Natural Resources, Chinese Academy of Sciences)
    2004, 25(04):  . 
    Asbtract ( 8207 )  
    Related Articles | Metrics
    Based on soil moisture data for 9 years at 16 agro-meteorological stations in the five Provinces of Western China, the actual evapotranspiration on the crop fields was estimated by using soil water balance equation and examined by calculating the dry index. The temporal and spatial distributions of evapotranspiration on the crop fields were discussed. The results showed that the changes of actual evapotranspiration on the crop fields accorded with the changes of precipitation. The actual evapotranspiration on the crop fields increased gradually as the dry indices increased from southeast to northwest. The greater the increment of the actual evapotranspiration on the crop fields had, the larger the required water amount for the actual evapotranspiration on the crop fields depended on the irrigation. As conclusion, the actual evapotranspiration on the crop fields in the Western China is closely related to precipitation and irrigation.
    Micro-climate Effects and High Efficient Planting-Raising Models inGreenhouse in Huaihe River Areas in Winter and Spring
    YU Jia-cheng, WANG Sheng(Anhui Agricultural University, Hefei 230036, China)
    2004, 25(04):  . 
    Asbtract ( 8554 )  
    Related Articles | Metrics
    Based on the analysis of the impacts of flood disaster on socio-economic development and the importance of high efficient planting-raising in the greenhouse mulched with plastic in the Huaihe River Areas in winter and spring (eg. no flood season), the micro-climate effects of the greenhouse mulched with plastic were analyzed in this region. The planting, raising and mixed planting-raising models in the greenhouse mulched with plastic in winter and spring were studied to provide disaster reduction techniques for this region.
    The Study on Effects of Meso-scale Terrain on Precipitation ofTorrential Rain by Numerical Modeling
    FENG Qiang~1,YE Ru-jie~2,WANG Ang-sheng~1,TAO Shi-yan~1,XU Huan-bin~3,GAO Shou-ting~1(1.Institute of Atmospheric Physics, Chinese Academy of Sciences Beijing,100029,China;2.Geophysics Department ofBeijing University; 3. Beijing Application Institute of Meteorology)
    2004, 25(04):  . 
    Asbtract ( 8401 )  
    Related Articles | Metrics
    The numerical modeling was conducted in this paper on investigation of the effects of meso-scale terrain on precipitation of torrential rain in Yangtze River and Huaihe River valleys on July 2,1991 by means of PSU/NCAR MM4. The elevation of Dabieshan Coteau was cut down to round about 50 m above sea level intentionally in the model topography. The outcomes of the numerical experiment revealed the fact that the topographical change of model results in the variation of the range and intensity of the meso-scale heavy-rain center, but the local topographical change had just influence on the local meso-scale heavy-rain system within a certain limited area.