关键词: 成年龙眼园, 平衡施肥, 土壤肥力, 叶片营养, 产量

Abstract: 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.

Key words: Mature longan orchard, Balanced fertilization, Soil fertility, Leaf Nutrition, Fruit yield