The field experiment was conducted to study the effects of controlled release fertilizer on soil nutrient content and growth of Malus hupenensis. The results showed that the releasing rate of controlled release fertilizer increased firstly and then decreased after reached the peak. The controlled release fertilizer could meet the nutrient requirement of Malus hupenensis in growth period and promoted its growth. Having the same fertilization rate with T2 treatment, the T3 treatment increased the plant height, stem diameter, dry weight and the contents of N, P and K in branch 17.69％, 10.89％, 31.98％, 54.29％, 22.5％ and 61.43％ respectively, as well as T4 and T5 treatments with less fertilization rate compared to T2 treatment. In conclusion, the T5 treatment with 320 kg/hm2 N, 120 kg/hm2 P2O5 and 400 kg/hm2 K2O was the best under the experiment conditions.%通过田间试验研究了控释肥对土壤和平邑甜茶养分含量及生长的影响.结果表明,控释肥养分的释放速率分为增加、高峰、降低3个阶段;控释肥养分的持续、稳定供应满足了平邑甜茶在整个生长期内的养分需求,促进了其生长.T2和T3处理的施肥量相同,控释肥T3处理的株高、茎粗、于重、枝条氮磷钾含量分别比T2提高了17.69%、10.89%、31.98%、54.29%、22.5%和61.43%;即使减少肥料的施用量,控释肥T4、T5,处理的株高、茎粗、干重和枝条氮磷钾含量仍不低于T2处理.综合评价,本试验条件下,减氮控释肥(T5)N-P2O5-K2O用量320-120-400 kg/hm2为最佳施肥量.
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