Abstract

Feeding of the escalating population has subjected today’s agriculture to massive farming that has shattered soil structure, organic carbon and fertility. The vulnerability of applied organics to high temperature make them inappropriate under such circumstances. The help of indigenous exopolysaccharides (EPS) secreting microflora (Pre-isolated (M₂, M₃, M₁₁, M₁₆, M₁₉ and M₂₂)) was taken in an incubation experiment for the restoration of soil structure and organic carbon. M₂₂ yielded 44.5% aggregation, 8.57 and 6 g kg^–1 total and macroaggregate carbon, 220 and 311.2 mg kg^–1 dissolved and microbial biomass carbon and 13.143 mg k^–1 CO₂ evolved in soils having moisture at 100% available water contents (AWC). At the end of the experiment M₂, M₁₉ and M₂₂ yielded 43.87, 42.58 and 42.82% (0.25 to >1 mm) water-stable aggregates (WSA) that also carried 5.31, 5.75 and 5.41 g kg^–1 carbon, respectively. Microbial activity as CO₂ evolved (13.13, 13.73 and 14.11), solution (217.37, 225. 98 and 218.61), biomass carbon (300.93, 287.6 and 303.51) mg kg^–1 and total organic carbon (TOC) (8.52, 8.67 and 8.73) g kg^–1 were found highest in M₂, M₁₉ and M₂₂ treated soils, respectively. Saccharide glues excreted from microbiota, flocculate soil particles to formulate aggregates, entrapping carbon for structural stabilization and organics restoration.

中文翻译：

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根瘤菌接种以量化砂质壤土土壤团聚体的结构稳定性和碳分布

摘要

不断增长的人口的供养使当今的农业遭受了大规模耕种，这破坏了土壤结构，有机碳和肥力。所施加的有机物易受高温的影响，因此在这种情况下不适合使用。在培养实验中采用了分泌微生物区系（预分离的（M ₂，M ₃，M ₁₁，M ₁₆，M ₁₉和M ₂₂）的原生胞外多糖（EPS）的帮助，以恢复土壤结构和有机碳。M ₂₂产生44.5％的聚集物，总计8.57和6 g kg ^–1，宏观聚集的碳分别为220和311.2 mg kg ^–1在水分含量为100％可用水分（AWC）的土壤中，会释放出溶解的微生物微生物碳和13.143 mg k ^-1 CO ₂。在实验结束时，M ₂，M ₁₉和M _22分别产生43.87％，42.58％和42.82％（0.25至> 1 mm）的水稳性骨料（WSA），它们分别带有5.31、5.75和5.41 g kg ^–1的碳。 。释放出CO _2的微生物活性（13.13、13.73和14.11），溶液（217.37、225。98和218.61），生物质碳（300.93、287.6和303.51）mg kg ^–1和总有机碳（TOC）（8.52、8.67和在M ₂，M ₁₉中发现最高8.73 g g ^–1和M ₂₂处理过的土壤。从微生物群落中排出的糖胶，絮凝土壤颗粒以形成聚集体，捕获碳以进行结构稳定和有机物修复。