This study developed the slow-release fertilizers using nanozeolite (NZ) composite–chitosan (CS)/sago starch (ST)-based biopolymer. The biopolymer nanocomposite was prepared by ionotropic gelation process using sodium tripolyphosphate as a crosslinking agent. The NZ was synthesized by the co-precipitation method and annealing at 650°C and characterized by scanning electron microscope, energy-dispersive X-ray spectrometry, X-ray diffractometry, and transmission electron microscope. The average particle size of NZ is 12.80 nm. The biopolymer nanocomposite was a considerable rise in the swelling ratio when molecular weight of CS and crosslinking times increased. The NZ–CS/ST nanocomposite showed the percentage amount release of phosphorus and urea at the 14th day to be 64.00 and 41.93%, respectively. The obtained fertilizer was applied to grow Philodendron sp., resulting in better growth indicators than the control and urea. Consequently, the prepared nanocomposite maintains the water level and can further be used as slow-release fertilizers in agriculture.

本研究使用纳米沸石 (NZ) 复合物-壳聚糖 (CS)/西米淀粉 (ST) 基生物聚合物开发了缓释肥料。以三聚磷酸钠为交联剂，通过离子亲和凝胶法制备生物聚合物纳米复合材料。NZ采用共沉淀法和650°C退火合成，并通过扫描电子显微镜、能量色散X射线光谱、X射线衍射和透射电子显微镜进行表征。NZ的平均粒径为12.80nm。当 CS 的分子量和交联时间增加时，生物聚合物纳米复合材料的溶胀比显着增加。NZ-CS/ST 纳米复合材料在第 14 天的磷和尿素释放百分比分别为 64.00% 和 41.93%。获得的肥料用于生长Philodendron sp .，导致比对照和尿素更好的生长指标。因此，制备的纳米复合材料可保持水位，并可进一步用作农业中的缓释肥料。