Pesticide contamination of fish ponds in relation to crop area in a mixed farmland-pond landscape (Dombes area, France)

Sarrazin, Benoît; Wezel, Alexander; Guérin, Mathieu; Robin, Joël

doi:10.1007/s11356-022-20492-8

Cited by 5 publications

(1 citation statement)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transport of soil salts is mainly carried by groundwater, so the depth of groundwater burial and mineralization are the main factors affecting the degree of soil salinization [5][6][7]. In recent years, the Ministry of Agriculture and Rural Development has actively promoted aquaculture in saline soils, and this mode of "digging ponds to reduce salt and fishing to cure alkali" can improve the soil structure, thus realizing the replanting of saline and alkaline soils [8,9]. Nowadays, fish pond aquaculture is very common in agricultural production [10,11], which is connected to the groundwater of nearby farmland and has a significant impact on the water-salt dynamics of arable land and wasteland.…”

Section: Introductionmentioning

confidence: 99%

Water–Salt Migration Patterns among Cropland–Wasteland–Fishponds in the River-Loop Irrigation Area

Yu,

Shi,

Miao

et al. 2024

Agronomy

View full text Add to dashboard Cite

In order to investigate the influence of freshwater fish ponds on water and salt transport in cultivated wasteland in salinized areas, a typical study area was selected in the middle and lower reaches of the Hetao Irrigation District in China in the Yichang Irrigation Domain, and the temporal and spatial changes in the salinity of soil and salinity of groundwater and fish pond water in the cultivated–wasteland–fish pond system were characterized through the monitoring of the environmental information of soil and groundwater at the boundaries of the cultivated land, wasteland, and fish ponds. Salinity changes and groundwater migration in different periods were determined, and the response of soil salinity to the depth of groundwater burial was analyzed, as well as the effect of fish ponds on soil salinization. The results showed that the amount of groundwater migrating from cropland to wasteland during the simulation period in 2022 was 2700 m3, the amount of groundwater migrating from wasteland to fish ponds was 630 m3, and the amount of groundwater migrating from fish ponds to wasteland during the fall watering period was 440 m3. From an overall perspective, the average soil salinity of wasteland was 1.56 times higher than that of the boundary of fish ponds. Not only do fish ponds play a positive role in the ecosystem, but they also have a desalinization effect that reduces soil salinity significantly. Groundwater depth and soil salinity have an exponential relationship; when the depth of groundwater is greater than 1.75 m, the soil salinity varies little with the depth of groundwater and the soil salinity is less than 0.66 ds/m, which can be determined as the critical depth, and the average depth of groundwater in cultivated land in the study area is 1.5 m. Therefore, it is necessary to reasonably control the water level of fish ponds, so as to make the groundwater depth of cultivated land control between 1.75 m and 2.0 m, and to prevent soil salinization.

show abstract