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通过田间试验,研究了农牧交错带不同施肥对土壤剖面微生物量的影响。结果表明:(1)有机肥及有机无机肥配施(MNP)土壤剖面的各层次微生物量碳、氮及总有机碳、全氮含量均高于有机肥(M)、无机肥配施(NP)和不施肥(CK)处理。(2)土壤有机碳和全氮剖面的变化趋势4个处理的基本一致,随土壤剖面的深度增加而下降。而土壤微生物量碳、氮含量为10-20cm>0-10cm>20-40cm。(3)微生物商作为长期培肥过程中土壤质量演变的评价指标有待商榷。(4)土壤微生物生物量碳、氮与土壤有机碳、氮之间存在线性相关关系,特别是土壤微生物生物量碳、氮之间关系显著(p<0.05),表明土壤微生物量可以用来指示土壤肥力的水平。研究结果能够很好的反映农牧交错带不同施肥措施下土壤肥力的变化情况。
Field experiments were conducted to study the effects of different fertilization on soil profile microbial biomass in the ecotone of agriculture and animal husbandry. The results showed that: (1) The contents of microbial biomass C and N, total organic carbon and total nitrogen in organic matter and organic-inorganic fertilizer application (MNP) were all higher than those of organic fertilizer (M) ) And no fertilization (CK). (2) Trend of soil organic carbon and total nitrogen profile The four treatments are basically the same, with the depth of the soil profile decreasing. The soil microbial biomass carbon and nitrogen content of 10-20cm> 0-10cm> 20-40cm. (3) Microbial traders as evaluation indicators of soil quality evolution during long-term fertilization are to be discussed. (4) There was a linear correlation between soil microbial biomass carbon and nitrogen and soil organic carbon and nitrogen, especially the relationship between soil microbial biomass C and N (p <0.05), which indicated that soil microbial biomass could be used to indicate Soil fertility levels. The results can well reflect the changes of soil fertility under different fertilization measures in the ecotone between agriculture and animal husbandry.