Baiyushan hilly area of northern Shaanxi was a large base of almond-apricot that is dominated by Prunus armeniaca×P.sibirica,but P.armeniaca.×P.sibirica trees in this region only blossom without fruit,having no output value.Investigation and observation have been taken for many years and the causes of the problem have been unveiled.It has been found out that P.armeniaca×P.sibirica florescence and setting fruit phase encountered strong and frequent frost,which could easily hurt the flower and young fruit.At ...
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