Gross N transformations and plant N use efficiency in intensive vegetable production soils

Dan, Xiaoqian; Ling, Meng; He, Mengqiu; Chen, Shending; He, Xiaoxiang; Zhao, Chang; Li, Xun; Cai, Zucong; Zhang, Jinbo; Müller, Christoph

doi:10.1016/j.soilbio.2022.108817

Cited by 12 publications

(8 citation statements)

References 60 publications

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“…One potential rationale for this trend might be the slow N mineralization and reduced NH 4 + production observed in the PFM-treated soil (Fig. 4; Table S1) (Dan et al, 2022;Tietema and Dam, 1996). This interpretation was further supported by the positive correlation between gross nitri cation rates and gross N mineralization rates (Fig.…”

Section: Effects Of Lm Mulching On Gross N Transformationsmentioning

confidence: 62%

“…4). Organic N mineralization generates NH 4 + , which serves as the substrate for nitri cation, and the rapid oxidation of fertilizer-derived NH 4 + to NO 3 − increases gross nitri cation rates (Dan et al, 2022;He et al 2020;Tietema and Dam, 1996). As fertilizer N is depleted, gross N mineralization and nitri cation rates decrease during the later stages of maize growth (Fig.…”

Section: Effects Of Lm Mulching On Gross N Transformationsmentioning

confidence: 99%

“…The principal pathways of N supply in arable soils are N mineralization (the conversion of organic N into The increased NH 4 + content resulting from organic N mineralization subsequently boosts net nitri cation rates, thereby increasing NO 3 − availability (Dan et al, 2022;He et al 2020). Thus, the immobilization of NH 4 + and NO 3 − by microbial processes emerges as a predominant mechanism for retaining N in the soil matrix (He et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…A faster microbial immobilization rate generally implies greater mineral N uptake by microorganisms, often leading to increased N retention (Dan et al, 2022;He et al 2020). However, it is critical to recognize that previous research has predominantly addressed net soil N transformation rates, which re ect the balance of N production and consumption processes (Elrys et al 2021;Hao et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen transformations in plastic-film mulched soils

Zhang,

Liu

et al. 2024

Plant Soil

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Plastic lm mulching induces signi cant shifts in soil temperature and water balance, thereby in uencing microbial activities, particularly those associated with nitrogen (N) transformations. However, its effects on interactions between N fate and soil N transformations remain unclear. MethodsWe investigated the complex interplay of soil N transformation processes using a 15 N tracing method, N availability, and N fate under plastic lm mulched ridges (PFM), in contrast to a non-mulched at system (control). ResultsPFM resulted in 20-28% reduction in gross N mineralization and nitri cation rates and increased rates of gross microbial N immobilization. Maize showed a 19% increase in N uptake and a 127% increase in N accumulation in the PFM-treated soil (up to 80 cm depth) compared to the control. PFM effectively inhibited N leaching, while also reducing N 2 O and NH 3 gas emissions (by 32 kg N ha -1 ). In the early stages of maize growth, PFM-treated soil showed increased N availability due to accelerated rates of gross N mineralization and nitri cation, which in turn bolstered N uptake by both maize and microorganisms. Furthermore, PFM effectively mitigated gaseous N emissions and N leaching, contributing to increased soil N retention and N use e ciency. As the rates of gross N mineralization and nitri cation declined in the later stages of maize growth, PFM maintained substantial N availability. This was achieved by limiting NO 3 leaching and microbial N immobilization, resulting in heightened N uptake and increased maize yield. ConclusionPlastic lm mulching produced changes in soil N transformation processes that included gross N mineralization, nitri cation, and immobilization rates. These changes manifested in increased N availability, maize N uptake, soil N retention, and reduced N losses.

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Section: Effects Of Lm Mulching On Gross N Transformationsmentioning

confidence: 62%

Section: Effects Of Lm Mulching On Gross N Transformationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nitrogen transformations in plastic-film mulched soils

Zhang,

Liu

et al. 2024

Plant Soil

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“…To what extent such a N sequestration leads to a competition for N between biochar and plants, however, is still not clear. The utilization of NO 3 − and NH 4 + by plants represents assimilation and immobilization processes, which can be quantified as NUE for plants [58]. Biochar is able to increase plant NUE by taking up NO 3 − -N and increasing local NO 3 − -N concentration in the plant [59].…”

Section: Nutrients Dynamic and Effect In The Substrate-plant Systemmentioning

confidence: 99%

Influence of Biochar Mixed into Peat Substrate on Lettuce Growth and Nutrient Supply

et al. 2022

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The use of peat in traditional cultivation systems and in commercial nurseries is an environmental problem. In this work, we evaluated the partial replacement of peat with different amounts of biochar sourced from vineyard pruning as plant growing substrates. We studied its effect on the growth of lettuce plants under greenhouse and semi-hydroponic conditions. Substrate mixtures contained 30% (v/v) of vermiculite and 70% (v/v) of different biochar:peat treatments as follows: 0:70 (B0), 15:55 (B15), 30:40 (B30), 50:20 (B50), and 70:0 (B70). Higher biochar treatments increased the pH and electrical conductivity of the substrate, negatively affecting plant growth and germination (especially in B70). The partial substitution of peat by 30% biochar (B30) delayed seed germination but improved plant growth and nitrogen use efficiency (NUE), with shoots containing higher levels of organic nitrogen and nitrate. Moreover, it increased the water holding capacity (WHC) and led to an efficient use of nutrients. Our study demonstrates that biochar can successfully replace and reduce peat and N fertilizer consumption. This has the potential to promote more sustainable farming with positive impacts on both plant growth and the environment.

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