摘要
以水为浸提溶液,研究了不同温度、pH和盐离子浓度条件对4种复合改性矿物包膜尿素养分释放的影响。结果表明,温度对复合改性矿物包膜尿素的养分释放速率有显著的影响,在15,25,35℃条件下,随着温度升高,水中养分溶出率均显著加快;盐浓度也是影响养分释放的重要因素,在5%,10%,20%尿素、氯化钾溶液中,随着尿素、氯化钾浓度的增大,复合改性矿物包膜养分释放速率明显降低;pH对复合改性矿物包膜尿素的养分释放的影响因包膜材料不同有所差异。
Using water as extraction solution,the effects of different temperature,pH and salt concentration conditions on the nutrient release of four types of compound modified mineral coated urea（CMMCU） were studied.The results showed that temperature significantly affected the nutrient release of CMMCUs at 15,25,35 ℃.Nutrient dissolution rate was significantly accelerated along with the temperature increasing.Salt concentration was also an important factor affecting the nutrient release,with urea and potassium chloride concentration increased from 5% to 10%,and to 20% respectively,nutrient release rate from CMMCUs were significantly decreased.However,the influence of pH were varied due to different coating materials.
出处
《水土保持学报》
CSCD
北大核心
2011年第3期68-72,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金(30971867)
广东省科技计划项目(2008B021000043
2009A020101001)
广东省自然科学基金重点项目(10251022501000000)
关键词
复合改性矿物包膜尿素
温度
PH
盐离子浓度
养分释放
compound modified mineral coated urea
temperature
pH
salt concentration
nutrient release
