在亚热带湿润气候条件下，许多山地黄壤村园由于建园标准低，管理粗放，加之柑植株生长直立，分枝角度小，枝叶细弱，花量大，直根系发达，须根吸收养分范围小，经常导致树冠扩展缓慢，挂果迟、产量低，果实品质低劣，容易形成大小年，树体过早衰老，经济效益低微。为此，我们 In the subtropical humid climate conditions, many mountain yellow soil village due to the construction of low standards, extensive management, combined with the growth of citrus plants erect, branches angle is small, weak foliage, flowers large, straight roots developed, fibrous absorption of fibrous roots small, often Resulting in slow expansion of canopy, delayed fruiting, low yield, poor quality of fruit, easy formation of year, premature senescence of tree and low economic benefit. For this, we