沙田柚衰老树的改造广西容县容城镇泽华果场有１９６５年定植的沙田柚６２株，１９８７年前平均株产仅１４．８ｋｇ，树势衰弱，枝梢纤细，叶片稀疏、薄而黄，花量大，畸形花多，占６０％以上，病虫害严重。我们从１９８７年冬开始对树冠和根系更新改造，改造后第３年即投... Shatian pomelo aging tree transformation Guangxi Rongxian Rongcheng Town, Zehua fruit field in 1965, planted 62 pomelo Shatian, 1987, the average plant yield of only 14.8kg, tree weakness, thin branches, sparse leaves, thin and yellow , Large amount of flowers, flowers deformity, accounting for more than 60%, pests and diseases serious. We are from the winter of 1987 on the crown and root system renovation, the transformation of the first three years that is ...