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为促进农业废弃物料的循环利用,选用秸秆(CS)、猪粪(PM)、酒渣(WR)、沼渣(BR)和菌渣(MR)5种来源于不同系统的农业废弃物料进行等碳量还田,外设单施无机肥(CF),不施肥(CK)以及裸地(CF)3个处理。测定了土壤水稳性团聚体、大团聚体包裹的微团聚体、土壤总有机碳(TOC)、全N以及团聚体结合态有机碳、N含量,以探讨农业有机废弃物料还田对土壤团聚体结构的稳定性以及土壤C、N的影响。与无机肥处理相比,有机物料还田分别使土壤大团聚体(Ma:0.25~8mm)、微团聚体(Mi:0.053~0.25mm)以及大团聚体包裹的微团聚体(Mm:0.053~0.25mm)含量平均增加34%、8%和34%,土壤团聚体平均重量直径(MWD)提高20%,土壤TOC含量平均增加61%,全N含量增加45%。其中以猪粪和酒渣最有利于团聚体以及土壤TOC、N含量的增加,沼渣效果最差。总体上有机物料还田促进了团聚体的形成和稳定,增加土壤TOC与N浓度,提高了团聚体对TOC和N的保护。
In order to promote the recycling of agricultural wastes, five types of agricultural wastes from different systems such as straw (CS), pig manure (PM), wine residue (BR), biogas residue (BR) Carbon back to the soil, the external application of inorganic fertilizers (CF), no fertilization (CK) and bare land (CF) 3 treatment. Soil organic aggregates, macroaggregates, soil total organic carbon (TOC), total N and aggregates of bound organic carbon and nitrogen in soil were measured to investigate the effects of returning agricultural organic waste materials to soil reunion The stability of body structure and the influence of soil C, N. Compared with the inorganic fertilizer treatment, the organic material returned to the soil to make the soil aggregate (Ma: 0.25-8mm), the microaggregate (Mi: 0.053-0.25mm) and the microaggregate (Mm: 0.053 ~ 0.25%) increased by 34%, 8% and 34% on average, 20% increase of MWD, 61% increase of soil TOC and 45% increase of total N content. Among them pig manure and rosacea were the most conducive to the aggregation and soil TOC, N content increased, the lowest biogas residue. In general, returning organic matter to the soil promoted the formation and stabilization of aggregates, increased soil TOC and N concentrations, and improved the protection of TOC and N by aggregates.