摘要
示范试验结果表明，成年龙眼的平衡施肥对提高土壤肥力、保持树体适宜营养水平以及增加果实产量有明显作用，从而证实平衡施肥方案的可行性。作者推荐，闽南丘陵地成年龙眼园的年施肥方案（667m2，产果1吨）：N20～25kg（有机肥的N约占年施N量的40％）；N：P2O5：K2O：CaO：MgO=1．0：0．5～0．6：1．0～1．1：0．8：0．4。
The demonstrative experiment was carried out in south Fujian during 1992～1996 in order to find out the feasibility of the balanced fertilization at full bearing period of longan trees. The results indicated that the balance fertilization of mature longan orchards markedly increased the soil fertility, maintained the suitable status of the plant nutrition and increased the fruit yield. The maintenance of a yield level of 1000 Kg longan fruits per 667 m2 growing on the red soil hilly lands of south Fujian could refer to the following fertilization program, namely, N, 20～25 Kg (N of organic fertilizer making up 40 percent of the total N fertilizer); N: P2O5: K2O: CaO: MgO=1. 0: 0. 5～0. 6:1. 0～1. 1: 0. 8: 0. 4.
关键词
龙眼
成年龙眼园
平衡施肥
土壤肥力
产量
Mature longan orchard
Balanced fertilization
Soil fertility
Leaf Nutrition
Fruit yield
