κ-Carrageenan–Sodium Alginate Beads and Superabsorbent Coated Nitrogen Fertilizer with Slow-Release, Water-Retention, and Anticompaction Properties
κ-Carrageenan–Sodium Alginate Beads and Superabsorbent Coated Nitrogen Fertilizer with Slow-Release, Water-Retention, and Anticompaction Properties
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DOI：
10.1021/ie2020526
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发表时间：
2012-01
影响因子：
4.2
通讯作者：
Yanfang Wang;Mingzhu Liu;Boli Ni;Lihua Xie
中科院分区：
文献类型：
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作者：
Yanfang Wang;Mingzhu Liu;Boli Ni;Lihua Xie
为提高肥料利用率，减少环境污染，研制了一种多功能缓释氮肥。以κ-卡拉胶-海藻酸钠（κC-SA）和交联κC-g-聚丙烯酸/硅藻土高吸水性树脂为内、外包衣材料，采用连续包衣法将其包覆在颗粒芯尿素上。元素分析结果表明，产物含氮22.6%。研究了SRNF在土壤中的水分蒸发和氮素释放行为。此外，与未涂覆的尿素相比，涂覆的尿素具有更高的平均压碎强度。土壤中掺入SRNF可有效防止土壤压实。研究表明，该产品制备工艺简单，具有良好的缓释和保水性能，在现代农业和园艺中具有广阔的应用前景。
A multifunctional slow-release nitrogen fertilizer (SRNF) has been developed to improve fertilizer use efficiency and reduce environmental pollution. κ-Carrageenan–sodium alginate (κC–SA) and cross-linked κC-g-poly(acrylic acid)/Celite superabsorbent were used as inner and outer coating materials, which were coated consecutively on the granule core urea in a pan granulator. Elemental analysis result showed that the product contained 22.6% nitrogen. The water evaporation as well as the nitrogen release behavior of SRNF in soil was explored. In addition, the coated urea had a higher average crushing strength in comparison with uncoated urea. Furthermore, the incorporation of SRNF in soil could effectively prevent the compaction of soil. These studies showed that the product prepared by a simple route with good slow-release and water-retention properties may be expected to have wide potential applications in modern agriculture and horticulture.