ʻO ka oxygen molecular i hoʻoheheʻe ʻia i loko o ka wai ua kapa ʻia ʻo oxygen dissolved a ʻike pinepine ʻia ʻo D0. ʻO ka nui o ka oxygen i hoʻoheheʻe ʻia i ka wai ʻili he 5-10mg/L. Ke ikaika nā makani a me nā nalu, hiki i ka oxygen dissolved i ka wai ke hiki i 14mg/L. Ua hoʻoheheʻe ʻia ka oxygen saturation=oxygen dissolved Measured value/Saturation content of dissolved oxygen ma lalo o nā kūlana i ana ʻia*100%, ʻo ia hoʻi, 90% a ma luna, ʻoi aku ka nui o ke ana ma luna o 7.5mg/L, a ʻo ka liʻiliʻi he 2mg/L.
E hele ka wai haʻahaʻa-oxygen i loko o ka mea kanu a hoʻoneʻe i ka oxygen mai ka ʻōnaehana kumu, a pēlā pū, e hoʻopau i ka oxygen i loko o ka lepo. Pono nā mea kanu olakino a me nā pua lepo maikaʻi i ka oxygen ma kēia mau ʻāpana ʻelua.
ʻO ka nele o ka hoʻoheheʻe ʻana i ka oxygen i loko o ka wai hiki ke hana i nā pilikia ʻē aʻe. No ka laʻana, nā nematodes e like me ka lepo anoxic. ʻO ka hoʻoulu ʻana i nā mea kanu me ka wai haʻahaʻa-oxygen e hoʻokokoke lākou i ka ʻili a hiki ke hōʻino i nā aʻa o nā mea kanu.
Ua hōʻike ʻia nā haʻawina ʻo ka hoʻohaʻahaʻa ʻana i ka neʻe ʻana o ka oxygen dissolved i loko o ke kumu aʻa o ka mea kanu e hōʻemi i ka hiki o ka mea kanu ke komo i ka nitrogen a me ka wai. ʻO ka nele o ka oxygen hiki ke hōʻeha i nā aʻa. I ka wā o ka hoʻololi ʻana i nā haʻahaʻa haʻahaʻa o ka oxygen dissolved, hoʻololi ka metabolism o ka mea kanu. ʻO ka nele o ka oxygen i loko o ka mea kanu i kapa ʻia ʻo hypoxia kūloko. ʻO kekahi o nā hopena, ʻo ia ka hoʻohaʻahaʻa ʻana o ka sucrose, a neʻe nā mea kanu i nā ala e hoʻopakele ai i ka ikehu e uku ai i ka nele o ka oxygen.
ʻO ka photosynthesis o phytoplankton ke kumu mua o ka oxygen i loko o ka loko iʻa, ma ke ʻano he 56% -80% o ke kumu oxygen; ʻo ke koena mai ka makani e puhi ana i nā nalu i hoʻoheheʻe ʻia ka oxygen i loko o ka wai. Pono 12-14mg/L
Heilongjiang: ʻO kahi ʻāpana o 600 square square o ka wai puna wai e hoʻomaikaʻi i ka mahana o ka wai ma 3 a 4 degere a hoʻonui i ka hana palaoa e 6%.