zài / huǎn shì / féi liào / zhōng / wēi jiāo náng jì shù / kě yǐ / kòng zhì / yǒu xiào chéng fèn / de / shì fàng / sù dù在缓释肥料中,微胶囊技术可以控制有效成分的释放速度。In slow-release fertilizers, microencapsulation can control the release rate of the active ingredients.