| 过磷酸钙 | | | 12%~18% | | 40%~50% | | | | | 667 m2 50kg | | | | 667 m2 20~25kg | | 667 m2 20~30kg | | 667 m2 10kg | | 1%~3% | 1. | 2. | 3. | | 4. | | | |