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由于在我国果园大发展时期大都以乔化苗木密植建园,随着树龄的增长,出现了不同程度的郁闭现象,光照不良,导致果品产量和品质下降。
Due to the large orchards in the great development period of our country with Qiaohua nursery dense planting garden, with the growth of the age, there are different degrees of canopy phenomenon, poor lighting, resulting in decreased fruit yield and quality.