仍以氮肥为例，缓释、控释肥料的具体含义和特点是，缓释氮肥（slow-release nitrogen fertilizer），是指由化学或物理方法制成能延缓养分释放速率，可供植物持续吸收利用的氮肥。
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Nitrate content of slow-release nitrogen fertilizers was higher than urea during cropping Chrysanthemum and Leaf-used lettuce. Nitrate content of slow-release nitrogen fertilizer treatments didn't exceed 1440mg/kg (national band third criterion) in spinach treatment.
在后两茬蔬菜中,缓释氮肥的硝酸盐含量比普通尿素高。
参考来源 - 缓释氮肥对不同蔬菜施肥效应及硝酸盐积累状况影响研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The invention relates to a slow-release type nitrogen-phosphorus-potassium composite fertilizer and a production method thereof, belonging to a composite fertilizer with slow-release type nutrient.
本发明是一种缓慢释放型氮磷钾复合肥料及其生产方法。属于营养成分缓 慢释放的混合肥料。
Slow release nitrogen fertilizers are discussed and evaluated in view of agrochemical considerations: (1) the agrochemical features and the efficiency of slow release fertilizer;
基于化肥的农业化学要求讨论和评价缓释氮肥：（1）缓释氮肥的农业化学特点及其肥效；
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