| 何绪生,耿增超.保水缓释钙肥的特征与性能[J].干旱地区农业研究,2017,35(1):85~90 |
| 保水缓释钙肥的特征与性能 |
| Characteristics and performance of water-absorbent slow-release calcium fertilizer |
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| DOI：10.7606/j.issn.1000-7601.2017.01.13 |
| 中文关键词: 保水钙肥 化学聚合 特征 性能 |
| 英文关键词:water-absorbent calcium fertilizer chemical polymerization characteristics performance |
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| 中文摘要: |
| 采用化学聚合反应将保水剂与硝酸钙聚合为一体化物质，并以吸水倍率、pH值、土壤水分特征曲线、元素分析、红外光谱、电子显微镜及7 d溶出率法表征保水钙肥的吸水持水能力、化学性质、形貌结构及养分释放性能。结果表明：保水缓释吸水倍率约为165 g·g-1，含钙量为103 g·kg-1，pH值近中性；保水剂通过化学键结合，基质包埋负载钙盐；网络孔隙及基质是保水钙肥吸水保水的物理结构；与对照相比，保水钙肥添加量为1%时，在测试吸力段可增加土壤容积含水量平均14.0%。此外，保水钙肥显示较好的钙素养分延缓释放性能，可将钙素较长时间保持在水凝胶基质内而延长水溶性钙有效期。 |
| 英文摘要: |
| Incorporating super absorbent polymer (SAP) and calcium nitrate into one body by chemical polymerization, and then water-absorbent/-retaining capability, some chemical properties, morphology and nutrient release performance of water-absorbent calcium fertilizer (WACF) were characterized by water absorbency, soil water characteristic curve, ultimate analysis, IR, SEM and 7-day dissolution rate. The results show that the WACF has water-absorbency of approximately 165 g·g-1, 103 g·kg-1 of calcium content, nearly neutral pH. The SAP incorporated with calcium fertilizer by chemical bond and substrate occlusion. The pores of cross-linked network of WACF are space to storing water. In comparison with the check treatment, WACF can increase volumetric water content of soil by average 14.0%between tested suction when the ratio of WACF to soil is 1%wt. Also, WACF show better slow-release performance of calcium nutrient which retain calcium nutrient in hydrogel substrate much more time that increase available duration of soluble calcium. |
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