土壤板结,会使果树根系严重缺氧,不利于根的伸展和正常呼吸,使果树生长结果不良。在树下建造“营养通气沟”,则是破除土壤板结层,消除土壤板结因素的新措施。建造“营养通气沟”的具体做法是:在树冠下挖4—5条辐射状沟,内距树干0.5米,外至树冠边沿,沟深,宽各30—40厘米,使沟内窄外宽,内浅外深,将作物秸杆(最好用玉米秸)捆成直径为25 Soil compaction, the fruit tree roots will be a serious hypoxia, is not conducive to the extension of the roots and the normal breathing, the poor growth of fruit trees. The construction of “nutrition ventilation groove” under the tree is a new measure to eliminate the soil compaction layer and eliminate the soil compaction factor. The construction of “nutrition ventilation groove” specific practice is: Dig 4-5 under the canopy radial ditch, 0.5 meters away from the trunk, outside to the edge of the crown, ditch deep, wide 30-40 cm, so that the narrow groove width , Shallow depth inside, the crop straw (preferably corn stalks) bundled into a diameter of 25