新型控释胶粘肥料创制中的理论和技术研究

The research on controlled release fertilizer was carried out to increase.fertilizer use efficiency and to reduce fertilization induced environmental pressure..There are three ways for controlled release of nutrients from fertilizers: coated method,.carrier method and controlled release device. Natural (Chitosan, pectin and glutin et.al.) and man-made (polypropyleneacyl, polyethylenol, wax, organic and inorganic.crosslinker) functional materials were used to make controlled release fertilizers.through physical or chemical blending.The controlled mechanism of carrier fertilizers.lie in the retarding function from molecule framework, and the time of controlled.release can be more than one week in water. The controlled release time of coated.fertilizer can be more than one week too. The controlled release device is another.novel way for controlling nutrients release, which controlled time can be more than.one month. The nutrients release from the carrier fertilizer and controlled release.device are linearly, and the release curve is like ‘S” for the coated fertilizer. A model.was established for the release of nutrients from the coated fertilizer. And the release.rate was affected by membrane thickness, the granule size and the temperature, and.3.this model is useful for the further research of coated fertilizers.

利用亲水性高分子聚合物为载体，创制新型控释胶粘肥料，研究养分离子性质、土壤环境条件和土壤微生物等因素对胶粘肥料热力学性质与动力学控释行为的影响。明确胶粘肥料的应用前景及在提高肥料利用率上的重要性和综合效益。创建具有国际先进水平、符合我国国情的新型控释肥料的理论和应用技术体系。推动化肥工业与农业科技进步，促进农业持续发展。.