Layer?s drinking water from two supplying sites in the two seasons, the concentration of ammoniacal nitrogen and nitrite-N were higher, the amount of bactria exceeded China?s drinking water criteria, but the pH accorded with the criteria.
英
美
- 兩飲水點(diǎn)（自來(lái)水），冬春兩季氨氮、亞硝酸鹽氮含量較高，細菌數量嚴重超標，pH值均符合飲水標準。
