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《Journal of Anhui Agricultural Sciences》 2007-03
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Analysis of the Correlation between Alfalfa Yield and Climatic Factor

REN Hong-yuan et al(Agricultural Research Center in Arid and Semiarid Area,Northwest S & T University of Agriculture and Forestry,Yangling,Shaanxi 712100)  
The correlation of yield of thirteen five-year growing alfalfa varieties and the climatic factor including accumulated temperature of above 5 ℃,sunshine hour and precipitation were studied with the method of correlation analysis and path analysis.The results showed that there was significant positive correlation between yield and climatic factor and the direct effect of three climatic factors on its yield was as follows: accumulated temperature of above 5 ℃sunshine hourprecipitation;and sunshine hour and precipitation had large positive indirect effect on the yield through accumulated temperature of above 5℃;accumulated temperature of above 5 ℃ and sunshine hour had negative indirect effect through precipitation;and accumulated temperature of above 5 ℃ was a decisive factor in yield structure.
【Fund】: 西北农林科技大学植物育种专项项目(05YZ019);; 陕西省自然科学基金项目(2006C105)
【CateGory Index】: S541.9
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