Atmospheric wet deposition serves as an important nutrient supply for coastal ecosystems and fishery resources: Insights from a mariculture area in North China

Xie, Lei; Gao, Xuelu; Liu, Yongliang; Yang, Bo; Wang, Bin; Zhao, Jianmin; Xing, Qianguo

doi:10.1016/j.marpolbul.2022.114036

Cited by 14 publications

(2 citation statements)

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“…Nonpoint nitrogen losses from farmland play a vital role in the degeneration of soil and aquatic ecosystems [1][2][3]. Snowmelt is a key factor in driving nitrogen export from farmland in seasonal freezing agricultural watersheds [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The higher water content in the frozen soil significantly decreases the soil infiltration capacity and increases the runoff coefficient [8,13]. The amount of snowmelt [14], snowfall/total precipitation ratio [3], occurrence of rain on snow events [15], and temperature rise events during winter can greatly influence the surface water storage form (liquid water, snow or ice) before snowmelt [16], which determines the release quantity and rate of water supplied to water generation. Moreover, the refreezing of snowmelt water can form basal ice below the snow cover [17], which can greatly enhance the snowmelt water yield [18].…”

Section: Introductionmentioning

confidence: 99%

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Critical Factors Affecting Water and Nitrogen Losses from Sloping Farmland during the Snowmelt Process

Zhao

Zhang

et al. 2023

Agronomy

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Water and nitrogen losses from farmland during the snowmelt process play a vital role in water and nitrogen management in cold regions. To explore the mechanisms and factors contributing to water and nitrogen loss from different sloping farmlands during the snowmelt period, field experiments were conducted under two slope treatments (8° and 15°), two soil water content (SWC) treatments, and two snow water equivalent (SWE) (5 mm and 10 mm) treatments in a seasonal freezing agricultural watershed of Northeast China. The results showed that during the snowmelt process, SWE was the most important factor affecting water and nitrogen production through the surface and total runoff of the sloping farmland, followed by the slope. The water and nitrogen yield in the high snow (HS) treatments ranged from 1.76 to 8.15 and 1.65 to 12.62 times higher than those in the low snow (LS) treatments. The generation of nitrogen was advanced compared with that of water induced by the preferential production of nitrogen. A higher slope promoted this preferential production function of nitrogen. Enhanced infiltration combined with the preferential yield of nitrogen resulted in a greatly decreased yield of water and nitrogen in the gentle slope and LS (GS_LS) treatments. These findings are valuable for accurately describing the water and nitrogen cycling in seasonally freezing sloping farmland.

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