Grafted longan,which were dealt by straight cleaving graft,ventral-graft,sloping cleaving graft and cleft-graft, survived 33.5% higher in controlled plot than in irrigation plot on average.

• 用正劈接、短枝腹接、斜劈接和舌接在控水区与灌水区分别对龙眼地苗进行嫁接。结果表明,控水区嫁接苗的平均成活率比灌水区的平均嫁接成活率高33．5%25。