1974～1978年的试验结果表明,复合肥对成令茶园和幼令茶园都有明显的增产效果,在等氮量的情况下,要比硫酸铵增产9.6～23%,以731号复合肥(N:P:K 为1:1:1.5)为最好,其次是732号复肥(2:1:1)和733号复肥(4:2;1)。也就是说,肥效随磷钾元素的含量的增加而提高。从复合肥型态来看,铵态型的734号复肥又比硝态型的733号复肥 The test results from 1974 to 1978 showed that the compound fertilizer had a significant yield increase effect on the tea plantations and the young tea plantations. Under the condition of equal nitrogen content, the yield was increased by 9.6-23% N: P: K is 1: 1: 1.5), followed by 732 compound fertilizer (2: 1: 1) and 733 compound fertilizer (4: 2; 1). In other words, fertilizer with potassium and phosphorus content increased. From the point of view of compound fertilizer, the ammonium compound 734 is more complex than the nitrate compound 733