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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (30): 143-147.doi: 10.11924/j.issn.1000-6850.2012-2875

• 农学 农业基础科学 • 上一篇    下一篇

工业木质素包膜缓释尿素释放规律的研究

崔智多 张小勇 莫海涛   

  • 收稿日期:2012-08-21 修回日期:2012-09-19 出版日期:2013-10-25 发布日期:2013-10-25
  • 基金资助:
    木质素包裹型缓释肥料生产技术中式与示范;5万吨/年麦草碱法漂白化学浆制浆过程污染减排集成技术及示范

Study on Releasing Properties of Controlled-release Urea Coated by Industrial Lignin

  • Received:2012-08-21 Revised:2012-09-19 Online:2013-10-25 Published:2013-10-25

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摘要： 为了探明工业木质素包膜缓释肥料的养分释放规律，以及温度、pH和后熟期对于包膜尿素养分释放的影响，进行了一系列的试验。实验结果表明：包膜尿素养分释放曲线呈“S”型，28天养分释放率达到73.77%，养分微分溶出率为1.83%，理论释放时间为50.25天。当温度对于养分的释放影响是十分显著的。当培养温度由25℃提高到40℃时，养分的初期溶出率由8.03%提升到16.24%，微分溶出率由1.83%变为1.88%，理论养分释放期由51.25天缩短至45.55天。H+和OH-的存在均会促进养分的释放。当室温放置时间为30天内时，肥料的缓释性能是最佳的。

关键词: 内生真菌, 内生真菌

Abstract: To explore the properties of slow-release fertilizer coated by natural wood powder, experiments were conducted including the variable quantity such as temperature, pH and the storage time. Results showed that nutrient accumulation-release curves of coating slow-release fertilizer was "S" type, the nutrient accumulation-release of 28 days was 73.77%, nutrient micro-release ratios was 1.83% and theoretical release time was 50.25 days. The release of nutrients was accelerated by temperature. Releasing of N was promoted by a H+ and OH-. Slow release fertilizer was in the best performance when is placed at room temperature time within 30 days.

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