数字农科院2.0

Substituting Ecological Intensification Of Agriculture For Conventional Agricultural Practices Increased Yield And Decreased Nitrogen Losses In North China

文献类型： 外文期刊

作者： Ullah, S; Ai, C; Huang, SH; Song, DL; Abbas, T; Zhang, JJ; Zhou, W; He, P

作者机构：

关键词： Ecological Intensification; Potential Nitrification Activity; Potential Denitrification Activity; N Cycling Genes; N2O Emissions; Ghg Emissions

期刊名称： APPLIED SOIL ECOLOGY

ISSN： 0929-1393

年卷期： 2020 年 147 卷

页码：

收录情况： JCR（2021版）

摘要： There is global concern about the adverse impacts of conventional agricultural practices on the environment. Recent evidence has shown that ecological intensification (EI) of agriculture can safeguard the environment from negative impacts of agricultural practices and simultaneously produce substantially higher crop productivity. Here, we employed the concept of EI and compared it with conventional agriculture or farmer's practice (FP). We explored the effects of EI and FP treatments on maize yield, N losses via potential nitrification activity (PNA), potential denitrification activity (PDA), N2O emissions, greenhouse gas (GHG) emissions, and nitrogen (N) cycling microbial populations associated with nitrification and denitrification in fluvo-aquic soil and black soil of North China. There were four treatments, i.e., EI N-, FP N-, EH N+, FP N + at each site, - and + indicate no N addition and N addition, respectively. The results revealed that across the two soils, N addition increased PNA and PDA; however, compared with the FP N + treatment, lower PNA and PDA were observed in the EI N + treatment. Similarly, the abundance of N cycling genes, including AOA amoA and AOB amoA, for nitrification and nirS, nirK, and nosZ for denitrification were significantly increased under N addition, and compared with the FP N + treatment, reduced abundance was noted in the EI N + treatment. N2O and GHG emissions were quantified, and it was observed that, in comparison to the FP treatment, reduced N2O and GHG emissions occurred in EI treatments in the two locations. EI with best management practices also increased crop yield relative to FP. Owing to higher N rates in FP treatments, substantial soil acidification was noted in FP plots but not in EI plots. In addition, PNA and PDA were significantly positively linked with soil nitrifying and denitrifying communities, particularly in the black soil. Moreover, the N availability pathway rather than soil acidification mainly regulated N cycling microbial communities. Our results suggest that EI could be a sustainable and environmentally friendly approach due to higher crop productivity and lower N losses via PNA, PDA, N2O, and GHG emissions, thus preventing the negative impact of agricultural practices, especially N fertilization, on the environment.

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