Impact of Split Nitrogen Topdressing on Rhizobacteria Community of Winter Wheat

Agriculture, Год журнала: 2025, Номер 15(7), С. 794 - 794

Опубликована: Апрель 7, 2025

Previous research on soil bacteria focused refining the nitrogen (N) rates during wheat (Triticum aestivum L.) growth cycle. Studies concerning how additional and split N topdressing applications can affect rhizobacteria are limited. To address this, a two-year field experiment took cultivar ‘Gaoyou 2018’ of winter as experimental material from October 2020 to June 2022. Three application regimes were established, including no (T1), single 120 kg ha−1 (T2) 80 (T3) at jointing stage, combining with 40 booting stage (T4), flowering (T5), 10th day post-anthesis (T6). The delayed impacts time diversity observed in second year, T4 exhibiting 10.5% higher Chao1 index 2% greater Shannon than T6. Results both years indicated that dominant bacterial phylum compositions rhizosphere similar across treatments. treatments fostered 22.9–27.9% Bacteroidita abundance but diminished 24.0–35.9% Planctomycetota, compared thenon-fertilized control (T1). T6 increased α-Proteobacteria by 15.7–22.0% versus T4, while redistribution MND1 genus Proteobacteria 31.3–62.5% T2. Redundancy analysis identified pH moisture content predominant environmental drivers shaping rhizobacteria. Preliminary findings revealed stages improved edaphic micro-environment modulated proliferation beneficial However, this change was not transmitted yield variation. These results suggest short-term management strategies may enhance ecological benefits intensifying soil–plant–microbe interactions, yet they lack direct agronomic advantages. Long-term trials required establish causality between microbial community dynamics crop productivity under regimes.

Язык: Английский

Altitudinal patterns of soil and microbial C:N:P stoichiometry in subtropical forests in Daming Mountain, South China

Frontiers in Earth Science, Год журнала: 2025, Номер 13

Опубликована: Апрель 7, 2025

Introduction Altitude-induced variations in hydrothermal conditions and vegetation affect the carbon (C), nitrogen (N), phosphorus (P) contents both soil microbial biomass. However, specific patterns of changes these nutrients their stoichiometry response to altitudinal remain unclear. Methods In this study, we analyzed biomass C:N:P across three layers (0–20, 20–40, 40–60 cm) subtropical mountain ecosystems on Daming Mountain, South China. Results Our results revealed that C content C:N ratio 0–20 cm layer initially increased then decreased with increasing altitude. Meanwhile, P decreased. Soil altitude all layers, whereas C:P N:P ratios exhibited opposite trends. For along gradient, growth was mainly restricted by P, limitation being more pronounced at mid-to-low altitudes. C, N, were positively correlated ratios, available N (AN), (AP), water (SWC), but negatively bulk density, pH temperature. contrast, stoichiometric or non-significant relationships factors. Notably, AN, AP, SWC dominant factors affecting stoichiometry. Discussion These findings contribute understanding nutrient responses environmental ecosystems.

Язык: Английский

Soil fertility matters! A new conceptual model for carbon stewardship in neotropical croplands taking climate-smart agricultural practices into account

The Science of The Total Environment, Год журнала: 2025, Номер 978, С. 179407 - 179407

Опубликована: Апрель 16, 2025

Язык: Английский