Nitrogen addition decreases soil aggregation but enhances soil organic carbon stability in a temperate forest

Chen, Zhijie; Geng, Shicong; Zhou, Xueya; Gui, Haoran; Zhang, Lanlan; Huang, Zhiqun; Wang, Minhuang; Zhang, Junhui; Han, Shijie

doi:10.1016/j.geoderma.2022.116112

Cited by 9 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The N treatments consisted of three levels of N addition (0, 10, 20 kg N hm −2 •yr −1 ) with the applied N fertilizer in the form of NaNO 3 , while the control plots received no N. There were three treatments in the experiment, and each group of treatments was replicated five times. The nitrogen addition treatments were applied twice a year, in May and October [13,14]. Nitrogen was applied by mixing the desired fertilizer in each treatment sample with 1 kg of sand (sand passed through a 4 mm sieve and applied after seed removal) and applying it to the soil surface.…”

Section: Experimental Area and Designmentioning

confidence: 99%

Nitrogen Deposition May Benefit to Larix olgensis Root Soils

Zhao

et al. 2023

Forests

View full text Add to dashboard Cite

Atmospheric nitrogen deposition affects the health of forest ecosystems by altering soil microbial activity. However, the effects of nitrogen addition levels, morphology and ecosystem type on whether nitrogen addition is beneficial or detrimental to soil health is controver-sial, and most studies have focused on the negative effects on microbial structure. Based on this, this study conducted a four-year experiment of nitrogen (NaNO3) addition at two levels (10 and 20 kg N hm−2·yr−1) in the understory soil of Larix olgensis in northeastern China to study soil microbial properties, soil enzyme activities, and to analyze soil physi-cochemical properties and the correlation between them. The results showed that nitrogen addition reduced soil pH and increased soil NH4+-N and NO3−-N contents, thus promoting the activities of Urease (Ure), Acid phosphatase (ACP) and N-Acetamidoglucosidase (NAG) and inhibiting the activity of Leucine aminopeptidase (LAP) in soil, further improving the diversity and richness of soil microorganisms and increasing the dominant taxa of beneficial microorganisms. This may be due to soil acidification caused by the addition of nitrogen, which increases the effectiveness of nitrogen in the soil, improving soil properties, moving soil health in a beneficial direction, promoting beneficial microbial activity, and making the soil more suitable for the growth of the acid-loving tree species L. olgensis. In general, N addition favored the development of soil bacterial communities and the maintenance of soil nutrient status, and had a positive effect on the soil nutrient status of L. olgensis. The results of this study may provide an important scientific basis for adaptive management of forest ecosystems in the context of global nitrogen deposition.

show abstract

Section: Experimental Area and Designmentioning

confidence: 99%

Nitrogen Deposition May Benefit to Larix olgensis Root Soils

Zhao

et al. 2023

Forests

View full text Add to dashboard Cite

show abstract

“…Such findings were explained by the lower priming effect causing a reduction in SOC decomposition rate in +s+m due to the abundance of nutrients, mainly dissolved N, compared to +m (Abdalla et al., 2022; Essel et al., 2021). The higher soil N abundance limits the soil microbial need for soil organic matter mining for nutrients, thus reducing the decomposition rate and promoting C stabilisation (Chen et al., 2022). In addition, the greater final SOC content in +s+m than +m observed in the current study site can further be explained by the physical protection of SOC within the aggregates as indicated by the greater MWD observed in the present study (Figure 1).…”

Section: Discussionmentioning

confidence: 99%

Soil organic carbon and nitrogen in aggregates in response to over seven decades of farmyard manure application

Abdalla

Gaiser

Seidel

et al. 2023

J. Plant Nutr. Soil Sci.

View full text Add to dashboard Cite

show abstract

“…In the present study, the GMD under the HN level was significantly higher than that under the LN level (Figure 1c). This result may be explained by the increasing proportion of large macroaggregates within the soil [44]. For example, there was a greater proportion of large macroaggregates under the HN treatment than under the LN treatment; consequently, the GMD was significantly greater under the HN level.…”

Section: Effects Of N Enrichment On Soil Aggregate Stability and Soil...mentioning

confidence: 97%

Nitrogen Enrichment Regulates the Changes in Soil Aggregate-Associated Bacterial Community: Evidence from a Typical Temperate Forest

Lv,

Liu,

Hai

et al. 2023

Forests

View full text Add to dashboard Cite

The nitrogen (N) enrichment induced by atmospheric N deposition affects both soil physicochemical properties and bacterial communities. However, how N enrichment affects soil aggregate-associated bacterial communities remains largely unclear. In this study, we conducted a two-year N addition experiment (four N levels: 0, 5, 10, and 20 g N m−2 year−1, corresponding to normal N, low N, medium N, and high N, respectively) in a Quercus liaotungensis Koidz–dominated forest. The distribution, nutrient content, and bacterial community composition of the soil aggregates were measured under various N enrichment conditions. N enrichment changed the aggregate distribution, increased the content of nutrients in aggregates, and altered the aggregate-associated bacterial community composition. N enrichment reduced the complexity of the bacterial co-occurrence network and degraded the interactions between bacteria compared with those observed under the normal N level. Aggregate-associated bacterial community was determined to be primarily affected by N enrichment level but not by aggregate size. The litter properties are the key factors affecting the composition of bacteria in aggregates. These findings improve our understanding of aggregate-associated bacterial responses to N enrichment and the related influencing factors.

show abstract

Nitrogen addition decreases soil aggregation but enhances soil organic carbon stability in a temperate forest

Cited by 9 publications

References 47 publications

Nitrogen Deposition May Benefit to Larix olgensis Root Soils

Nitrogen Deposition May Benefit to Larix olgensis Root Soils

Soil organic carbon and nitrogen in aggregates in response to over seven decades of farmyard manure application

Nitrogen Enrichment Regulates the Changes in Soil Aggregate-Associated Bacterial Community: Evidence from a Typical Temperate Forest

Contact Info

Product

Resources

About