Development of release-controlled phosphate containing seedbed by use of biomaterial and visible light-responsive titanium oxide photocatalyst

利用生物材料和可见光响应二氧化钛光催化剂开发控释磷酸盐苗床

• 批准号: 20510080
• 负责人: TAKADA Naoko
• 金额: $ 1.25万
• 依托单位: Azabu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20510080/
• 关键词: 省資源; バイオ素材; 可視光型酸化チタン; 環境負荷低減技術; 緩効性リン肥料; カラゲナン; トレハロース; ゲル; 育苗床

A seedbeds containing release-controlled phosphate was made by using two kinds of biopolymer(gel materials), namely, karageenan or alginic acid ammonium. Into the seedbeds, calcium hydrogen phosphate as release-controlled phosphate was added with trehalose as a growth factor. Japanese mustard spinach had been grown up as an examination plant for 40 days in an incubator to the following examinations : to increase the growth rate by good mixed ratios of biopolymer gel materials, to decrease the number of fungi by the coating of visible light-responsive titanium oxide photocatalyst, and to examine the difference of growth rate by the difference of position where seed was buried. The plant growth rates were measured by the yields and phosphorus utilization rates. As the result in the examination, the higher yield was obtained by this seedbed than fused phosphate fertilizer commercially selling. These phosphorus utilization rates were around 20%. When the supply of phosphorus is tight worldwide, these examinations were very significant, because the seedbeds by use of biopolymers have enabled to save phosphorus and therefore to reduce the environmental load.

采用卡拉胶和海藻酸铵两种生物聚合物（凝胶材料）制作磷酸盐控释苗床。向苗床中添加作为控释磷酸盐的磷酸氢钙和作为生长因子的海藻糖。日本芥菜菠菜作为试验植物在培养箱中培养了40天，以进行以下试验：通过生物聚合物凝胶材料的良好混合比例来提高生长率，通过可见光响应型氧化钛光催化剂的涂层来减少真菌的数量，并通过种子埋藏位置的不同来检查生长率的差异。植物生长速率通过产量和磷利用率来衡量。试验结果表明，该苗床比市售的熔融磷肥获得了更高的产量。这些磷利用率约为20%。在全球磷供应紧张的情况下，这些检查非常有意义，因为使用生物聚合物的苗床可以节省磷，从而减轻环境负荷。