The effect of nutrient release from coated sulfur zinc fertilizer of diammonium phosphate, granular monoammonium phosphate, KCl is compared by the method of water immersion test. The results show: after soaking 4 h, the nutrient release effect of outsourcing fertilizer and the blank fertilizer is basically the same;At the beginning of the release of the nutrient phase (soaking time <1 h), compared to the blank fertilizer, the greater the proportion of the parcel S+Zn fertilizer, the slower the release of nutrients;Granular potash fertilizer package S+Zn, compared with the blank fertilizer has little difference. It is showed that the nutrient release of potassium fertilizer is not much affected by the S+Zn particles. In the field test, the effect of Forbon ammonium phosphate fertilizer coating sulfur zinc and microessentials are better than the black monoammonium. It showed that zinc could increase crop yield.%利用水浸法试验对磷酸二铵、颗粒磷酸一铵、氯化钾3种外包硫锌营养元素肥料养分释放情况进行对比.结果表明,浸泡4h后,外包肥料与空白肥料养分释放量基本一致;在养分最开始释放阶段(浸泡时间<1h),包裹S+Zn比例越大的肥料与空白肥料相比,养分释放越慢;颗粒钾肥包裹S+Zn,与空白肥料相比,差异较稳定,说明钾肥颗粒包裹S+Zn后对养分释放没有太大影响.在大田试验中,富邦硫锌包膜磷铵肥料与美可辛均比不加硫锌的磷酸一铵效果好,说明硫锌能提高作物产量.
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