氮磷钾比例是指肥料中氮(N)、磷(P)、钾(K)的相对含量。[1][2]植物生长时需要从土壤摄取最多为氮磷钾这三种元素。常见的氮肥有尿素、硝酸钠、硫酸铵等;磷肥有过磷酸钙、磷矿粉、骨粉等;钾肥有硫酸钾、氯化钾和草木灰。化学复合肥就是混合了二种以上元素的肥料。[3]

商业肥料氮磷钾值

开采化肥矿物质的氮磷钾值

  • 00-3-00至00-8-00 磷矿石(如果它是水溶性,将是00-34-00)
  • 00-00-60 氯化钾
  • 11-08-02至16-12-03 鸟粪

生物固体肥料和其他的氮磷钾值

  • 04-12-00 骨粉
  • 06-02-00 Milorganite英语Milorganite
  • 03-02-02 畜禽粪便
  • 01-00-00 奶牛粪肥
  • 01-00-01 马粪

参考资料

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