不同固化剂组配对固化成型肥料浸水稳定性的影响

Effects of Different Groups of Curing Agent on Soaking Stability of Fertilizer Made by Curing Method

为研究固化剂不同组配对固化成型肥料浸水稳定性的影响,本试验设置不施加固化剂(CK1)、施加优选固化剂组配(CK2)及施加不同固化剂组配的4个处理(分别为T1、T2、T3和T4),测定其抗压强度并对其浸水稳定性进行分析。结果表明:各处理肥料颗粒的抗压强度大小顺序为CK1>CK2>T4>T3>T1>T2,加入固化剂降低了肥料的硬度,与CK2相比,不同固化剂组配的肥料硬度均有所降低;肥料的浸水质量损失率、氮磷钾浸水释放规律及水溶液的EC值均表现为CK1>T2>T1>T3>T4>CK2,表明优选的固化剂组配能显著降低肥料的浸水养分释放速率;各肥料处理浸泡溶液的pH值也有所变化,添加硅酸盐水泥的肥料浸水后溶液pH值明显高于未添加硅酸盐水泥的肥料。试验验证了优选固化剂组配的优异性能,可为此类肥料的研发提供理论依据。

In order to study the effect of different groups of curing agent on soaking stability of fertilizer made by curing method, 4 treatments(T1, T2, T3 and T4), CK1(no curing agent), and CK2(optimized curing agent group) were set in this experiment. The compressive sthrength and soaking stability of prepared fertilizer were analyzed. The results showed that the compressive strength of fertilizer particles was sequenced as CK1>CK2>T4>T3>T1>T2. The hardness of fertilizer was reduced by the addition of curing agent. Compared with CK2, the fertilizer hardness of the curing agent treatments all decreased. The mass loss rate during soaking was sequenced as CK1>T2>T1>T3>T4>CK2, and also the releasing rule of nitrogen, phosphorus and potassium and the EC value of water solution, which indicated that the optimized curing agent group could significantly reduce the release rate of fertilizer nutrients during soaking. The pH value of the fertilizer soaking solution also changed, and that of the soaking solution of the fertilizer with portland cement was significantly higher compared with the fertilizers without portland cement. The experiment verified the excellent performance of the optimized curing agent, which could provide a theoretical basis for the research and development of this kind of fertilizer.