The result indicated that the different nitrogen element has the different influence on apocynum venetum degumming, the remnant pectin rate is 14.1% with ammonium salt as nitrogen additive, 15% with the nitrate.

• 结果表明，不同化合价的氮元素对罗布麻生物脱胶具有不同的影响，以铵盐作为含氮添加剂残胶率为14.；1%25，以硝酸盐作为含氮添加剂残胶率为15%25。