[1]SONG Jia,LI Huaien,LI Jiake,et al.Characteristics of Soil and Nutrient Losses Under Natural Rainfall in Yingwugou Small Watershed[J].Research of Soil and Water Conservation,2021,28(05):7-12.
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Characteristics of Soil and Nutrient Losses Under Natural Rainfall in Yingwugou Small Watershed
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 05
Page number:
7-12
Column:
Public date:
2021-08-20
- Title:
- Characteristics of Soil and Nutrient Losses Under Natural Rainfall in Yingwugou Small Watershed
- CLC:
- X522; TV93
- DOI:
- -
- Abstract:
- In order to study the characteristics of soil erosion and nutrient losses under different land use types in Danjiang Basin,and provide scientific and effective basis for the prevention and control of agricultural non-point sources,taking Yingwugou small watershed which belongs to the Danjiang River Basin in the Middle Route of the South-to-North Water Transfer Project as the research object,the runoff plots were established to analyze the runoff sediment,nitrogen and phosphorus loss characteristics of cultivated land,forest land and grassland under the natural precipitation conditions from 2019 to 2020. The results showed that the water,soil and nutrient losses in each plot were positively correlated with slope,precipitation and rainfall intensity,and the regression equation of precipitation and runoff(sediment)had a good correlation(R2>0.85),which could be used for the estimation and prediction of current and sediment yield in the later stage. Under different land use types,soil,water and nutrient losses decreased in the order: cultivated land>grassland>forest land. The trend of nitrogen and phosphorus losses in all forms was similar,among which nitrate and orthophosphate accounted for the largest proportion in total nitrogen and total phosphorus,respectively,and the output of nitrogen was far greater than that of phosphorus. The correlation analysis showed that the overall influences of various factors on nutrient losses was in the sequence: runoff>sediment>precipitation,and the correlation of phosphorus loss with rainfall,runoff and sediment was higher than that of nitrogen.
- References:
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Last Update:
2021-08-20