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《Anhui Agricultural Science Bulletin》 2008-20
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Using Multiple Regression Double Screeningwe to Analysis the Responses of Climate Factors to the Rice Yield in Linyi

Lv Xuemei Zhang Lei Liu Shengjuan(Meteorology Bureau of Linyi City,Shandong Province,Linyi 276004)  
Based on the data of climate and rice observation in Linyi City of Shandong Province basic national agro-meteorological station from 1994~2007,using multiple regression double screening,we analysised the influence of Meteorological factors in different growth period to the major production of the rice.The result indicated that the precipitation in the Spike differentiation period was the main element affecting the Rice Yield in Linyi City,during this period the Rice Yield decreased 13.5Kg per ha as the precipitation increasing 1mm.The principal factor influencing the Air Unfulfilled rate was the average temperature in the spike growing period,the Air Unfulfilled Rate of rice descended approximately 3.93 per cent as the temperature ascending 1℃.The granule of the rice Ear and the rate of earing was affected in common by the sunshine hours in the Tillering stage,along with the sunshine extending one hour in Tillering stage,the granule of the rice Ear reduced probably 0.24 granule and the rate of earing 0.07 per cent.The other major meteorological element impacting the granule of the rice Ear was the average temperature in the spike growing stage.Thousand-grain weight(TSG)was effected mainly by the average temperature and precipitation in the Spike differentiation period,during which low temperature and much raining would not be hepful to the increasing of TSG.
【CateGory Index】: S511
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