化肥的原料是石油，石油是碳氢化合物。粮食需要的氮，磷，钾从何而来？望释疑。

来源: 匆匆客于 2015-07-22 09:07:03 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.