The results showed: fertilization could increase the content of humus, decrease E4/E6, and improve the degree of complexity of humic acid molecule.
结果表明：通过施肥提高腐殖质的含量同时能降低胡敏酸E4/E6值，增加了胡敏酸分子的复杂程度。
Application organic fertilizer for long time can improve the content of humus, and inorganic fertilizer can enhance the content of Fulvic acid, decrease the content of humic acid.
长期施用有机肥能提高胡敏酸的含量，施用无机化肥可提高富里酸降低胡敏酸的含量。
No appreciable effect of humus acid was noted.
腐殖酸效果不明显。
Under normal pressure and room temperature, urea humate is manufactured by coating urea with coal humus acid, with water and a few additives as its binder, also its agricultural effect is examined.
介绍用水和少量添加剂作介质，在常温常压下，煤炭腐植酸与尿素直接进行络合反应包裹生产腐植酸尿素的工艺及特点，并对其农业应用效果进行了讨论。
Under normal pressure and room temperature, urea humate is manufactured by coating urea with coal humus acid, with water and a few additives as its binder, also its agricultural effect is examined.
介绍用水和少量添加剂作介质，在常温常压下，煤炭腐植酸与尿素直接进行络合反应包裹生产腐植酸尿素的工艺及特点，并对其农业应用效果进行了讨论。
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