施入土壤中能缓慢释放其养分的肥料,称为缓释肥料。它对作物具有缓效性或长效性。广义的控释肥料包括能延长养分释放期的一切缓释肥料,而确切地控释肥料,是指那些养分释放速率能与作物需肥规律相一致(或基本一致)的肥料。这类肥料能最大限度提高肥料利用率,防 Fertilizers that are applied to the soil to slowly release their nutrients are called slow release fertilizers. It has a slow or long-lasting effect on crops. Extended controlled release fertilizers include all slow-release fertilizers that prolong the release of nutrients, whereas exact controlled-release fertilizers refer to those that have a nutrient release rate that is consistent (or nearly identical) with the rate of fertilizer use by the crop. This type of fertilizer can maximize fertilizer utilization, prevention