摘要
采用红外光谱(FTIR)对以尿素、甲醛和磷酸一铵为原料,制备了以磷酸一铵为核心,脲醛肥为膜材料,同时含有氮、磷两种营养元素的包膜缓释肥的结构进行了研究。通过其在土壤中的养分释放特性表明,在土壤中,氮元素的缓释期为100 d,磷元素的缓释期为30 d;而在水中,氮元素在100 d时只释放了70%,磷元素在10 d时则达到100%。说明作为膜材料的缓释肥通过聚合物降解的化学过程,使氮元素获得了明显的缓释效果;作为核心的磷酸一铵,受包膜的物理保护,其分子中的磷元素也获得了一定的缓释效果。
In this paper,urea,formaldehyde and ammonium dihydrogenphosphate（MAP）were used as raw materials to prepare coated slow-release fertilizer containing two nutrients of nitrogen and phosphorus,in which MAP is the core and urea-formaldehyde fertilizer is a membrane material.Infrared spectroscopy（FTIR）is used to study its structure.The results show the nutrient release characteristics in soil are that nitrogen of slow-release period is 100 days,P element-release period is 30 days,while in the water solution nitrogen release amount accounts for 70% in 100 days,and P release amount in the 10 days can reach to 100%.These results indicate that the slow-release fertilizer as a membrane material through chemical processes of polymer degradation,therefore there has a significant slow-nitrogen release effect;as the core of the MAP,by the envelope of physical protection of phosphorus in the mole,there has a certain amount of slow-phosphorus release effect.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2010年第4期1027-1031,共5页
Journal of Plant Nutrition and Fertilizers
基金
山西省科技攻关项目
20080311027-2
关键词
包膜缓释化肥
制备
红外光谱
养分释放特性
coated slow-release fertilizer
preparation
FTIR
nutrient release characteristic
