柑桔“小老树”的改造技术改造“小老树”的目标，主要是复壮树势；促进早果高产，因此要采取一切促进营养生长的措施，才能达到目的，①首先要复壮根系，促进根系加深生长和须根的生长，主要措施是增厚土层，改良土壤，采用培土、爆破或在树冠两侧轮流挖长１米、深８０－... Citrus “small old tree” transformation “Small old tree” The goal is to rejuvenate the tree vigor; promote early fruit and high yield, so to take all measures to promote vegetative growth in order to achieve the goal, first of all, rejuvenation root system, Promote root growth and growth of the fibrous roots, the main measure is to thicken the soil, improve the soil, using earth-mined, blasting or digging in the canopy on both sides of the turn 1 m long, deep 80 -...