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密植苹果郁闭园的树体管理马希满张建军杜纪壮石海强马继红（河北省农林科学院石家庄果树所０５００６１）密植苹果园，由于重栽轻管，或是密栽稀管，均易出现不同程度的郁闭现象，影响产量和质量的提高。对这些郁闭园，必须采取相应的树体管理措施。１轻度郁闭园的管理—...
Close planting apple canyon tree management Ma Ximan Zhang Jianjun Du Jizhuang Shi Haiqiang Ma Jihong (Hebei Academy of Agriculture and Forestry Shijiazhuang fruit trees 050061) densely planted apple orchard, due to replant light tube, or close planting thin tube, are prone to varying degrees of depression Closed phenomenon, affecting the yield and quality improvement. For these canyons, the corresponding tree management measures must be taken. 1 mild canyon management -...