Reducing soil erosion and nutrient loss on sloping land under crop-mulberry management system

Fan, Fangling; Xie, Deti; Wei, Chaofu; Ni, Jinren; Yang, John; Tang, Zhenya; Zhou, Chuanwen

doi:10.1007/s11356-015-4608-2

Cited by 25 publications

(17 citation statements)

References 18 publications

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“…This explains, at least in part, the positive impact of forest on TP. Slope is an important factor influencing erosion and sediment yield (Fan et al 2015). Previous studies have shown that sediment yield increases as slope increases, with improved export of TP (Molina-Navarro et al 2014).…”

Section: Relationship Between Background Values Of Soil Nutrient and mentioning

confidence: 99%

Impact of land use changes on water quality in headwaters of the Three Gorges Reservoir

Yang

Wang

et al. 2015

Environ Sci Pollut Res

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The assessment of spatial and temporal variation of water quality influenced by land use is necessary to manage the environment sustainably in basin scales. Understanding the correlations between land use and different formats of nonpoint source nutrients pollutants is a priority in order to assess pollutants loading and predicting the impact on surface water quality. Forest, upland, paddy field, and pasture are the dominant land use in the study area, and their land use pattern status has direct connection with nonpoint source (NPS) pollutant loading. In this study, two land use scenarios (1995 and 2010) were used to evaluate the impact of land use changes on NPS pollutants loading in basins upstream of Three Gorges Reservoir (TGR), using a calibrated and validated version of the soil and water assessment tool (SWAT) model. The Pengxi River is one of the largest tributaries of the Yangtze River upstream of the TGR, and the study area included the basins of the Dong and Puli Rivers, two major tributaries of the Pengxi River. The results indicated that the calibrated SWAT model could successfully reproduce the loading of NPS pollutants in the basins of the Dong and Puli Rivers. During the 16-year study period, the land use changed markedly with obvious increase of water body and construction. Average distance was used to measure relative distribution patterns of land use types to basin outlets. Forest was mainly distributed in upstream areas whereas other land use types, in particular, water bodies and construction areas were mainly distributed in downstream areas. The precipitation showed a non-significant influence on NPS pollutants loading; to the contrary, interaction between precipitation and land use were significant sources of variation. The different types of land use change were sensitive to NPS pollutants as well as land use pattern. The influence of background value of soil nutrient on NPS pollutants loading was evaluated in upland and paddy field. It was found that total nitrogen (TN) and total phosphorous (TP) in upland were more sensitive to NPS pollutants loading than in paddy fields. The results of this study have implications for management of the TGR to reduce the loading of NPS pollutants into downstream water bodies.

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Section: Relationship Between Background Values Of Soil Nutrient and mentioning

confidence: 99%

Impact of land use changes on water quality in headwaters of the Three Gorges Reservoir

Yang

Wang

et al. 2015

Environ Sci Pollut Res

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“…Similarly, annual precipitation is 920 mm with 70% rainfall occurring from May to July [39]. The major soil type is purple soil, classified as Calcaric Purpli-Udic Cambisols according to the World Reference Base for Soil Resources (WRB), which developed from sandstones deposits of the Jurassic period [19] with a relatively thin soil layer and short hydraulic retention time. The soil pH ranges from 5.6 to 8.5, and the organic matter content in the soil ranges from 4.4 to 28 g kg −1 , with a mean of 5.9 ± 0.36 g kg −1 .…”

Section: Case-study Areamentioning

confidence: 99%

“…The TGRR in China refers to the 21 counties and cities in Hubei Province and Chongqing Municipality with an aggregate area of 58,800 km 2 [18]. The agricultural watershed around the TGRR has a significant disturbance from human activities, which have increased the soil erosion rates [19]. The large proportion (95.7%) of mountainous and hilly regions of TGRR has necessitated widely-distributed slope croplands (78% of total cropland), which are an important source of soil erosion at the regional scale [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…Annual soil loss in the TGRR amounts to 157 million t, and approximately 25% of that is delivered to the Yangtze River [18]. Moreover, nutrients and pollutants are transported to surface waters via erosion and runoff, potentially causing eutrophication and trace metal pollution [19,[24][25][26][27]. Given this serious erosion of the TGRR, erosion control would greatly improve the sustainability of agriculture and improve water quality.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Soil Erosion Dynamics Using the GIS-Based RUSLE Model: A Case Study of Wangjiagou Watershed from the Three Gorges Reservoir Region, Southwestern China

Xue

Lyu

Wang

et al. 2018

Water

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The adjacent agricultural watershed is a vital component of the Three Gorges Reservoir Region (TGRR); however, it is affected by serious soil erosion. Assessing soil erosion dynamics in such watersheds is useful for identifying its causes and tendencies to develop, in turn providing scientific information for soil and water conservation at the regional scale. In the present study, the spatial and temporal patterns of soil erosion of a small agricultural watershed in central TGRR were investigated from 2002 to 2014 using the Revised Universal Soil Loss Equation (RUSLE) model, combined with Geographic Information Systems (GIS). The trends and processes of the overall soil erosion intensity were analyzed using spatial overlay analysis and the Markov transition matrix model, respectively. The spatial distribution of soil erosion rates within this watershed was relatively consistent during the study period. Erosion intensity was moderate, with a mean soil loss of 35.1 t·ha −1 ·year −1 . Precipitation was a dominant factor influencing the intensity of soil erosion. Moreover, most erosion intensities shifted closely to middle grades from 2002 to 2008, and declined from 2008 to 2014, indicating that soil erosion in the Wangjiagou watershed has recently decreased. These results suggest that recently implemented integrated soil management practices were responsible for the recently observed erosion patterns.

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“…Losses of NH4 + -N, NO3 − -N, and TP decreased by 58.9-97.75%, 14.09-98.06%, and 39.0-94.28% respectively, at the end of flooding. Fan et al (2015) investigated surface runoff and N and P loss on sloping land under crop-mulberry management. The experiments consisted of six cropmulberry treatments: Control (no mulberry hedgerow with mustard-corn rotation); T1 (two-row contour mulberry with mustard-corn rotation); T2 (three-row contour mulberry with mustard-corn rotation); T3 (border mulberry and onerow contour mulberry with mustard-corn rotation); T4 (border mulberry with mustard-corn rotation); T5 (two-row longitudinal mulberry with mustard).…”

mentioning

confidence: 99%

Nonpoint Source Pollution

Ahmad

Sakib

Gang

2016

Water Environment Research

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Reducing soil erosion and nutrient loss on sloping land under crop-mulberry management system

Cited by 25 publications

References 18 publications

Impact of land use changes on water quality in headwaters of the Three Gorges Reservoir

Impact of land use changes on water quality in headwaters of the Three Gorges Reservoir

Assessment of Soil Erosion Dynamics Using the GIS-Based RUSLE Model: A Case Study of Wangjiagou Watershed from the Three Gorges Reservoir Region, Southwestern China

Nonpoint Source Pollution

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