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采用随机区组设计,设4个单播鸭茅、无芒雀麦(Bromus inermis)、白三叶(Trifolium repens)、苜蓿(Medicago sativa)、15个混播处理(9∶1、7∶3、5∶5、3∶7、1∶9)和无牧草播种处理,研究鸭茅与伴生种在不同混播比例下对土壤微生物数量和土壤酶活性的分布影响。结果表明:土壤微生物数量和土壤酶活性随着土层深度的增加而逐渐降低,且表现为0~10 cm>10~20 cm。混播处理相同土层,土壤细菌和放线菌以鸭茅和苜蓿混播时为最多,鸭茅和无芒雀麦混播时次之,鸭茅和白三叶混播时最小。鸭茅和豆科牧草混播时的脲酶活性高于鸭茅和无芒雀麦混播时的活性,鸭茅和苜蓿或无芒雀麦混播时的土壤蔗糖酶和土壤过氧化氢酶高于鸭茅同白三叶混播时的活性。与无牧草播种处理相比,单播和混播处理均提高了土壤蔗糖酶和过氧化氢酶活性。
A total of four uniaxial ducks, Bromus inermis, Trifolium repens, Medicago sativa, 15 mixed sowing treatments (9: 1, 7: 3, 5: 5, 3: 7, 1: 9) and no forage sowing treatment to study the impact of Dactylis glomerata and its companion species on the distribution of soil microbial quantity and soil enzyme activity at different mixing ratios. The results showed that the amount of soil microbes and soil enzyme activity decreased with the increase of soil depth, and showed 0 ~ 10 cm> 10 ~ 20 cm. Mixed treatment of the same soil layer, soil bacteria and actinomycetes to sow and alfalfa when sowing the most mixed, sow and bruegrass mixed broadcast second, sow and white clover mixed when the smallest. The activity of urease in mixed sowing of Dactylis glomerata and Leguminosae was higher than that of Dactylis glomerata and Bromus inermis, and the activities of soil invertase and soil catalase were higher when sowing with orchard grass and alfalfa or Bromus inermis With white clover mixed activity. Compared with the no-pasture seeding treatment, both uni-sowing and mixed seeding increased soil sucrase and catalase activities.