生化耗氧量养殖初、末期相比较升高了75.75%；

There was 75.75% increase on chemical oxygen demand (COD).

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生化耗氧量——在由特定容量排放的小河中氧需求的测量。

Biochemical oxygen demand — the measure of the oxygen demand placed on a stream by any particular volume of effluent.

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生化耗氧量——在由特定容量排放的小河中氧需求的测量。

Biochemical oxygen demand — the measure of the oxygen demand placed on a stream by any particular volume of effluent.

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