Trichoderma Bio-Fertilizer Decreased C Mineralization in Aggregates on the Southern North China Plain

Trichoderma bio-fertilizer is widely used to improve soil fertility and carbon (C) sequestration, but the mechanism for increasing C accumulation remains unclear. In this study, effects of on mineralization aggregate-associated organic were investigated in a field experiment with five treatments (bio-fertilizer substitute 0 (CF), 10% (BF10), 20% (BF20), 30% (BF30) 50% (BF50) chemical fertilizer nitrogen (N)). Aggregate fractions collected by dry sieving method determine dynamics C. The microbial community across aggregate was detected phospholipid fatty acid (PLFA) method. results indicated that increased stock bulk compared CF. Cumulative application rate. However, proportion mineralized lower BF20 treatment except <0.053 mm aggregate. Moreover, PLFAs fungal PLFA/bacterial PLFA first then decreased rates. Compared CF, increases bacteria >2 79.7%, 130.0%, 141.0% 148.5% BF10, BF20, BF30 BF50, respectively. Similarly, 0.25–2, 0.053–0.25 aggregates showed similar trend Bio-fertilizer value fungi PLFA/bacteria G+ PLFA/G− PLFA, shared greatest changes. Therefore, appropriate beneficial improving micro-environment minimizing risks degradation.