Influences of forest cover on soil freeze-thaw dynamics and greenhouse gas emissions through the regulation of snow regimes: A comparison study of the farmland and forest plantation

Chen, Lixin; Chen, Zuosinan; Jia, Guodong; Zhou, Jie; Zhao, Jiachen; Zhang, Zhiqiang

doi:10.1016/j.scitotenv.2020.138403

Cited by 25 publications

(21 citation statements)

References 69 publications

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“…During the Freeze-Thaw period a different complex of factors caused a substantial increase in N 2 O emissions from soil. Several hypotheses have been posed to explain this phenomenon, the most common of which are: i) freeze-thaw disrupts soil aggregates exposing physically protected organic matter to be rapidly mineralized by microorganisms 40 ; ii) large proportions of microorganisms, ne roots, and mycorrhiza die during the freeze 44 shortly after the thawing 39,64,65 ; however, the peaks lasted only for a short period (few days 65 ). This was also the case in our investigations (Fig.…”

Section: Relationships Of N 2 O Ux and Environmental Parametersmentioning

confidence: 99%

“…Freeze-Thaw cycles are well-known to substantially increase N 2 O emission from soils whereas in agricultural soils their impact is more remarkable than in forests 39,40 . In forests, the Freeze-Thaw periods can signi cantly contribute to the annual N 2 O budgets 39,41,42 .…”

Section: Introductionmentioning

confidence: 99%

“…In northern deciduous forests it can be due to the increase in Freeze-Thaw cycles 43 . Although there are several hypotheses explaining the impact of Freeze-Thaw cycles on soil N 2 O emissions 40,44,45 , a generally acceptable theory of Freeze-Thaw impact on N 2 O uxes is still missing.…”

Section: Introductionmentioning

confidence: 99%

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Canopy airspace of riparian forest mitigates soil N2O emission during hot moments

Mander

Krasnova

Escuer-Gatius

et al. 2020

Preprint

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Riparian forests are known as hot spots of N cycling in landscapes and climate warming speeds up the cycle. Here we present results from the first multi-annual high temporal-frequency study of soil, stem and ecosystem (eddy covariance) fluxes of N2O from a typical riparian forest in Europe.Hot moments (extreme events of N2O emission) last a quarter of the study period but contribute more than a half of soil fluxes. For the first time we demonstrate that high soil emissions of N2O do not reach the ecosystem level. During the drought onset, soil N2O emission peaks at intermediate soil water content. Rapid water content change is the main determinant of the emissions. The freeze–thaw period is another hot moment. However, according to the eddy covariance measurements the riparian forest is a modest source of N2O. We propose photochemical reactions and dissolution in canopy-space water as consumption mechanisms.

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Section: Relationships Of N 2 O Ux and Environmental Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Canopy airspace of riparian forest mitigates soil N2O emission during hot moments

Mander

Krasnova

Escuer-Gatius

et al. 2020

Preprint

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“…Increasing air temperature, for instance, can affect the FT dynamics through decreasing the length of frozen season 8 , increasing depth of the active soil layer 9 , and permafrost retreat 10 . Decreasing snow depth, in parallel, reduces the thermal insulation of soil interface with atmosphere and increases soil vulnerability to fluctuations in air temperature 11 , 12 . This can in turn contribute to decreasing frost depth and increasing the frequency of swings in FT states 13 .…”

Section: Introductionmentioning

confidence: 99%

Compound changes in temperature and snow depth lead to asymmetric and nonlinear responses in landscape freeze–thaw

Hatami

Nazemi

2022

Sci Rep

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Cycles of freeze–thaw (FT) are among the key landscape processes in cold regions. Under current global warming, understanding the alterations in FT characteristics is of a great importance for advising land management strategies in northern latitudes. Using a generic statistical approach, we address the impacts of compound changes in air temperature and snow depth on FT responses across Québec, a Canadian province ~ 2.5 times larger than France. Our findings show significant and complex responses of landscape FT to compound changes in temperature and snow depth. We note a vivid spatial divide between northern and southern regions and point to the asymmetric and nonlinear nature of the FT response. In general, the response of FT characteristics is amplified under compound warming compared to cooling conditions. In addition, FT responses include nonlinearity, meaning that compounding changes in temperature and snow depth have more severe impacts compared to the cumulative response of each individually. These asymmetric and nonlinear responses have important implications for the future environment and socio-economic management in a thawing Québec and highlight the complexity of landscape responses to climatic changes in cold regions.

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“…Natural-climatic factors can affect plants in different ways, and some of them (e.g., light and temperature regimes) are virtually unregulated in agriculture, while some (e.g., moisture) can be managed to some extent by humans, which is the basis for the development of irrigated agriculture [2]. The issues of optimizing agricultural landscapes, preserving the quality and quantity of water resources in order to improve the sustainability of rural development attract a lot of attention [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Snow melioration effect on winter wheat yields in different soil and climatic zones

Tarasenko

Tarbaev

Vasilieva

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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Under conditions of ongoing climate warming and increasing anthropogenic impact on land resources, the use of moisture-saving soil-protecting technologies becomes especially important. Snow cover is of great importance for agriculture, as it changes radiation and thermal balance of underlying surface, protecting soil from cooling and winter crops from freezing, accumulates winter precipitation, being the most important source of increasing soil moisture reserves in arid and subarid zones in spring. Winter precipitation accounts for up to 30% of the annual norm. Soil moisture reserves formed with their help take up to 42% in total water consumption for grain crop yield formation during wet summer and up to 75% during dry summer. This article aims to study the effect of different methods of snow retention and snow cover height on the yield of grain crops. An effective method of snow retention is leaving high stubble after harvesting winter and spring crops. Leaving stubble bushes with a height of 0.35-0.40 m and a width of 1.5 m every 4.5 m provides accumulation of a solid snow cover in steppe areas with a height of 0.30-0.35 m, which increases the yield of wheat. Waders provide a more uniform distribution of snow cover than forest strips. Climate change contributes to the fact that snow retention becomes an urgent problem not only in the dry steppe, but also to the north -even in the forest-steppe. Creation of snow retarders was done on Vetelny state farm, located in Balashovsky district in the western part of Saratov region, in the steppe zone, where chernozem soils prevail in the soil cover. In the autumn period, snow barriers were installed, and in the winter period, their effect on snow accumulation was studied. The study of the effect of snow barriers on soil moisture accumulation during the growing season of winter wheat was compared in the zones of dry steppe, steppe and forest-steppe. It was revealed that during regrowth of winter wheat the least amount of productive moisture stocks in 0-1.0 m soil layer was contained in dry steppe 1377 m 3 •ha -1 , the highest in forest-steppe zoneup to 1841 m 3 •ha -1 . Snow retention increased the amount of moisture in the soil in the dry steppe, steppe and foreststeppe zone by 251, 151, 115-131 m 3 •ha -1 , or 18, 10, 6-8%, respectively. Thus, rational use of winter precipitation is a significant reserve of agricultural landscape productivity increase, especially in dry-steppe areas.

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Influences of forest cover on soil freeze-thaw dynamics and greenhouse gas emissions through the regulation of snow regimes: A comparison study of the farmland and forest plantation

Cited by 25 publications

References 69 publications

Canopy airspace of riparian forest mitigates soil N2O emission during hot moments

Canopy airspace of riparian forest mitigates soil N2O emission during hot moments

Compound changes in temperature and snow depth lead to asymmetric and nonlinear responses in landscape freeze–thaw

Snow melioration effect on winter wheat yields in different soil and climatic zones

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