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Tillage effect on soil N uptake and utilization by the changes of chiA and aprA gene under parallel nitrogen application

文献类型： 外文期刊

作者： Ran, Linling 1 ; Wang, Junqiang 1 ; Wu, Haoyang 1 ; Xue, Yunyin 1 ; Wang, Jinglong 2 ; Wei, Wei 2 ; Hu, Xinkun 1 ; Qiu, Xiaoqin 1 ; Yan, Shuang 1 ; Shi, Hao 4 ; Zheng, Shaikun 4 ;

作者机构： 1.China West Normal Univ, Key Lab Southwest China Wildlife Resources Conserv, Minist Educ, Nanchong 637009, Peoples R China

2.State Key Lab Highland Barley & Yak Germplasm Reso, Lhasa 850000, Peoples R China

3.Tibet Acad Agr & Anim Husb Sci, Inst Pratacultural Sci, Lhasa 850000, Peoples R China

4.Gansu Agr Univ, Coll Forestry, Lanzhou 730070, Peoples R China

关键词： Tillage; chiA; aprA; Nitrogen; Nitrogen uptake efficiency (NUpE); Nitrogen utilization efficiency (NUtE)

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.5； 五年影响因子：5.9 ）

ISSN： 1161-0301

年卷期： 2026 年 172 卷

页码：

收录情况： SCI

摘要： Nitrogen (N) transformation is largely contingent on the activity of enzymes encoded by crucial microbial Ncycling genes. To investigate the impact of different tillage practices on soil chiA and aprA genes and nitrogen utilization efficiency (NUtE) under parallel nitrogen application, a 5-year (2017 and 2021) in-situ experiments was conducted in the oasis zone of Northwest China. Four tillage treatments (NT, no-tillage; MT, minimal-tillage; ST, sub-tillage; FT, fold-tillage) with three replications were employed in a randomized complete block design. We assessed soil N-related chemical properties and functional gene community composition and performed regression analyses to explore the relationship between functional genes and N utilization and uptake. Principal Coordinate Analysis (PCoA) showed the significant effects of tillage on soil microorganisms. Tillage affects the changes of nitrogen indicators, which in turn correlate with chiA and aprA. The chiA was significantly negatively correlated with nitrogen uptake efficiency (NUpE) (p = 0.03) and significantly positively correlated with NUtE (p = 0.01). The aprA exhibited significantly negative correlations with changes in soil dissolved organic nitrogen (DON) (p = 0.02) and soil urease activity (URE) (p = 0.05), and significantly positive correlations with NUpE (p = 0.01) and yield (Y) (p = 0.008). These findings suggest that tillage affects aprA and chiA communities and their relative abundances. Additionally, changes in functional genes impact nitrogen conversion and plant selectivity in nitrogen uptake under parallel nitrogen application conditions.

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