HiN, HoN, HoA, HiB, HoB and HiA accounted for 29.7%, 26.5%, 21.1%, 13.4%, 5.1% and 4.2% of DOC, respectively.

• DOM中HiN、HoN、HoA、HiB、HoB及HiA的含量分别为 2 9 7%25 ；2 6 5%25 ；2 1 1%25 ；13 4%25 ；5 1%25及 4 2%25 .