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Effect of Altitude on Zanthoxylum planispinum var.dintanensi Yield and Quality in Huajiang Valley of Guizhou Province

HE Rui-kun et al(School of Geographical and Biological Science,Guizhou Normal University,Guiyang,Guizhou 550001)  
In this article the corresponding relationships between the Zanthoxylum planispinum var.dintanensi yield and quality and the altitude height in Huajiang valley of Guizhou province was analyzed according to the data from the experiment at Huajiang valley in 2006.The result showed that the relationships between Zanthoxylum planispinum var.dintanensi yield and quality and altitude height could be described with liner regression equation y=bx+a,and the yield was descended evidently with rising of altitude height.The region that altitude height was below 850 m was the most suitable area for Zanthoxylum planispinum var.dintanensi planting.
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