However, even increase P application quantity (750.00 mg P2O5/kg soil), the CRF with long nutrient release period (180 days) could reduce ryegrass P uptake significantly.

• 然当控效期长（180天），即使增大磷肥用量（750.；00 mgP2O5/kg土），控释肥料能明显降低黑麦草吸磷量；