鸟粪层

缩写：nfc

拼音：niǎo fèn céng

解释：在海鸟成群栖息的地方，逐渐堆积起来的一层层的鸟粪‖多量的氮﹑磷或钾，是很好的肥料，产于智利和我国南海的许多岛屿上。

更新时间：2024-10-05 11:26

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