A green slow-release fertilizer composition based on urea-modified hydroxyapatite nanoparticles encapsulated wood

作者：Kottegoda Nilwala^*; Munaweera Imalka; Madusanka Nadeesh; Karunaratne Veranja

来源：Current Science, 2011, 101(1): 73-78.

• Fertilizer
• macronutrients
• slow-release
• nanoparticles
• wood stem

In this paper we describe a strategy for sustained release of nitrogen into the soil. Specifically, urea-modified hydroxyapatite nanoparticles were encapsulated under pressure into cavities of the soft wood of Gliricidia sepium. Nitrogen release of the nanofertilizer composition was studied using soil from three elevations in Sri Lanka (pH 4.2, 5.2 and 7) and compared with that of a commercial fertilizer. The nanofertilizer showed an initial burst and a subsequent slow-release even on day 60 compared to the commercial fertilizer, which released heavily early followed by the release of low and non-uniform quantities until around day 30.

• 出版日期2011-7-10