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对九龄生腰果树进行施肥(氮磷钾肥)方法的试验:(1)距树3米范围内撒施;(2)施入距树3米的一条25厘米宽、15厘米深的环形沟内;(3)施入距树3米和1.5米的二条环形沟内;(4)与土壤混合拌施于距树1.5—3米的环形带内。施后每隔7天采叶样分析氮、磷、钾含量,一直到第49天。数据已列成一览表。第(3)种施肥方法叶片养份累积量最大,但成本也最高,建议只用于沙土。第(2)种一条沟的方法建议用于斜坡地。第(4)种方法用于平地。
The experiment of fertilizing (N, P, K) fertilizers (N, P and K) for the nine-year-old cashew tree: (1) spreading within 3 meters of the tree; (2) applying a 25 cm wide and 15 cm deep annular ditch (3) into the two annular groove 3 meters and 1.5 meters away from the tree; (4) mix with the soil in the annular zone 1.5-3 meters away from the tree. Leaf samples were taken every 7 days after application to analyze nitrogen, phosphorus and potassium levels until the 49th day. The data is tabulated. The first (3) fertilization method leaves the largest accumulation of nutrients, but the cost is also the highest, it is recommended only for sand. The method of (2) a ditch is recommended for slopes. The fourth method is for flat ground.