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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4 h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<1 h),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。
The nutrient release status of three kinds of sulfur and zinc nutrition elements fertilizers were compared by water immersion test on diammonium phosphate, granular monoammonium phosphate and potassium chloride. The results showed that after 4 h of soaking, the nutrients released from the blank fertilizer were almost the same as those of the blank fertilizer. Compared with the blank fertilizer, the fertilizer with the larger proportion of S + Zn in the initial stage of nutrient release (soaking time <1 h) Compared with blank fertilizer, the difference was more stable, indicating that the potassium fertilizer wrapped S + Zn had little effect on nutrient release. In the field trials, Fupon sulfur zinc coated ammonium phosphate fertilizer and the United States can be better than the zinc and zinc sulfate-free ammonium phosphate effect, indicating that sulfur and zinc can increase crop yields.