Table of Content

10 October 1998, Volume 19 Issue 05

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An Agrometeological Analysis on the High-Yield Culture of Panax pseudo ginseng var. notoginseng

Wu Qiurong (Tianjin Meteorological Bureau, Tianjin 300074) Li HongmeiYin Linsen(Yunnan Meteorological Institute)(Wenshan Meteorological Station)

1998, 19(05):  . 

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By several years of experimental studies of high yield culture of Panax pseudo ginseng var. notoginseng (a traditional Chinese medicine), the relationship between the growth characteristic value of “Panax pseudo ginseng var. notoginseng” and meteorological conditions is analysed. The absolute degree of correlation between the mean yield of several years and meteorological elements is analysed and verified by using the Grey System methods, and the agrometeorologically technical measure to cultivate “Panax pseudo ginseng var. notoginseng” for high yield is put forward.

Application of NOAA/AVHRR data to dynamic Monitoring of Drought in Shaanxi Province

Zhang Shuyu Zhao Jieming Yuan Yashe Li Xingmin (The remote Sensing Information Center for Agriculture of Shaanxi Province, Xi'an 710015)

1998, 19(05):  . 

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With the help of saterlite NOAA/AVHRR data and soil moisture data observed and using the methord of greeness index of plant and bright temprature, dynamic monitoring of drought in Baoji, Guanzhong, Weibei areas and so on was carried out. It was shown that the results is very like the real situation.

Preleliminary Studies on Chilling Injury of Summer sowing Maize in Beijing and the Countermeasures

Guo Wenli Zhao XinpingZheng Dawei Batuer Bake(Beijing Climatical Center,Beijing 100081)(China Agricultural University)

1998, 19(05):  . 

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On the basis of analysing more than ten years of chilling injury and thirty six years of climatic features, the thermal conditions in summer sowing maize growing period and the temporal and spatial distribution patterns of the chilling injury of summer maize is studied and the climatic background for reducing chilling injury is analyzed. The optimum cropping system and rational distribution of summer sowing maize varieties and effective countermeasures are proposed.

Study on the Characteristic of Interannual Change of Grain Yield in Gansu Province

Yin DongYang Jiabao(Lanzhou Institute of Arid Meteorology, Lanzhou 730020)(Meteorological Bureau of Gansu Province)

1998, 19(05):  . 

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Besed on the data of grain yield in Gansu Province, the characteristics of the trend of yield, interannual change and the periodic pattern of climatic yield were studied by using entropy analysis, differentiation of abundant year and lean year, variance analysis, power spectrum after getting a series of climatic yield and affirming the fitting normal distribution. It was also discussed the problem of compositional adjustment of summer and autumn grain crops in this paper.

Research on Optimal Irrigation System of Sugarbeet in Ningxia Irrigation District

Li Fengxia Zhou HuiqinXu Yangchun(Ningxia Meteorological Institute, Yinchuan 750002)(Ningxia Meteorological Observatory)

1998, 19(05):  . 

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Based on Blank crop model, this paper has adopted the method of dynamic program to determine the optimal irrigation system of sugarbeet in Pingluo irrigation district of Ningxia. The system can save water and raise yield. According to the experiment results in Pingluo, during the whole growing period, except the seedling stage and full maturing stage, sugarbeet needs irrigation for the other five stages and the amount of water needed is 50m 3/(666.7m 2) at each stage, the total amount of irrigation water is 250m 3/(666.7m 2), the actual root yield is 3567.2kg/(666.7m 2).

Present Research on the Effect of Meteoroecological Factors on Rice Quality

Cheng FangminZhu Biyan(Zhejiang Agricultural University, Hangzhou 310029)(South China Normal University, Guangzhou 510631)

1998, 19(05):  . 

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The present research situation on the relationship between meteoroecological factors and rice quality was summerized in 4 parts including milling quality, appearance quality, cooking quality, nutrition quality and some problems existing in those researches were discussed as well.

Dynamic Analysis on the Effect of Meteorological Conditions on the Spring Wheat Growth in Nomuhong Area of Qinghai Province

Ma Lin Hu Ling (Qinghai Meteorological Institute, Xi Ning 810001)

1998, 19(05):  . 

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The meteorological conditions in the growth period of the spring wheat in Nomuhong area of Qinghai Province are analyzed by comparing with the observed materials of the spring wheat growth and the corresponding meteorological data in the area during 14 years (1980￣1993). The effect of the favourable and unfavourable meteorological elements on the growth and development of spring wheat during the growing period is comprehensively analyzed. Then the optimum disposition model of meteorological elements are advanced for the high and stable yield of the crop in this area by synthesizing conclusion.

The Effect of Future Climatic Variation on Potential Productivity of Spring Soybean in Nanjing

Zheng Youfei Zong Xuemei Chen Wanlong Lian Jiasheng (Nanjing Institute of Meteorology, Nanjing 210044)

1998, 19(05):  . 

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The potential productivity of spring soybean in Nanjing is calculated and the changes of soybean potential productivity under the climatic conditions in the future is analyzed. In addition to temperature, precipitation, and CO 2 concentration, the effect of enhanced ultraviolet reached on earth’s surface in the future on the growth and yield of soybean is stressed here. The results revealed that under the climatic conditions in the future, the potential productivity of spring soybean in Nanjing aera of Jiangsu Province will present decreasing trend.

Forecasting the Occurrence Degree of Aphis Gossypii Glover at Cotton Seedling Stage Using the Fuzzy Optimized Technique

Ding Shifei (Department of Basic Courses, Shandong Agricultural University, Taian 271018)Gao ShilongChen Jian(Linyi Agricultural Burean)(Yitang Agricultural Technology Station in Linyi)

1998, 19(05):  . 

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Based on the historic data of the occurrence degree of Aphis gossypii Glover in cotton seedling stage observed in Qufu, Shandong Province and the meteorological data during the years of 1982￣1994, a model of fuzzy optimized prediction for forecasting the occurrence degree of Aphis gossypii glover at cotton seedling stage was established. The coincidence rate of forecast with historic data reached 100% in test. The forecasted results carried out in 1995 completely coincided with the actual occurrence.