Different soil had different soil active humus, which was extracted by 1mol L-1 NaOH.
2．土壤活性腐殖质(1molL-1 NaOH提取部分)即游离松结态腐殖质，因土壤而异。
·2,447,543篇论文数据，部分数据来源于NoteExpress
For soil trace element, the ageing humus had fixed effect. The nascent active humus had effect to promote the activity.
对土壤微量元素，老化的腐殖质有固定作用，新生的活性腐殖质有促进活性作用。
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