The experiment was carried out to evaluate effects of covering wheat straw in apple orchard and apricot orchard on soil humus composition, microflora and soil enzyme activities.
在杏园和苹果园覆盖麦草，研究其对土壤腐殖质组成、微生物区系及土壤酶活性变化的影响。
Its composition containing: organic humus and nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and iron, copper, zinc, boron, molybdenum and other trace elements.
它的成份含﹕有机腐殖质和氮、磷、钾、钙、镁、硫及铁、铜、锌、硼、钼等多种微量元素。
The results showed that long term fertilization affected not only the content and composition of soil humus, but also the physicochemical property of the soil humus.
结果表明，长期施肥不仅影响土壤腐殖质的含量与组成，还影响腐殖质的理化性质。
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