摘要
以包膜控释肥为试验材料,通过静水释放试验测定其养分释放速率。结果表明,控释肥的养分累积释放曲线呈“S”形或“抛物线”状;影响控释肥养分释放的控释因子主要是温度、包膜厚度及添加剂等;提高浸提温度其释放速率明显加快,增加包膜厚度其释放速率显著降低。控释肥养分释放机理为:水蒸气透入包膜内,逐渐形成饱和养分溶液,同时包膜被水蒸气膨胀,导致膜上微孔增大,使养分逐渐扩散溶出。
Taking membrane wrapping control-releasing fertilizer as testing material, through static water releasing test, its nutrient releasing rate was measured. The resuh indicates that the nutrient accumulation releasing curve of control-releasing fertilizer is ＂s＂ shaped or in ＂parabolic＂ shape; the control-releasing factors influencing control-releasing fertilizer nutrient release are mainly the temperature, membrane wrapping thickness and additive etc.; increasing the impregnation temperature could speed up obviously releasing rate, but increasing membrane warping thickness could lower obviously releasing rate. The releasing mechanism of the control-relcasing fertilizer nutrient is： water steam is impregnated into membrane wrapping, the saturated nutrient sulution is gradually formed, the membrane wrapping is simultaneously expanded by water steam, that leads micro --hole on the membrane enlarged, and makes the nutrient to diffuse out gradually.
出处
《化肥设计》
CAS
2006年第2期56-58,61,共4页
Chemical Fertilizer Design
基金
农业部跨越计划资助项目
编号:2001-跨8
关键词
包膜控释肥
静水释放试验
控释因子
释放机理
membrane wrapping control-releasing fertilizer
static water releasing test
control-releasing factors
releasing mechanism
