研究发现，焦化蜡油中主要的富氮组分是较小分子的戊烷不溶物，或者是更小分子、极性较强的己烷不溶物。

It is found that the major nitrogen sources in coker gas oils are associated with relatively small pentane insoluble species and an even smaller, highly polar, hexane insoluble species.

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不施用有机肥时，水溶性无机态氮为水溶态氮素流失的主要形态，所占比例在60％左右；

Without the application of manure, the inorganic nitrogen is the main pattern of the water-solution nitrogen loss, occupying about 60%.

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