[1]TANG Zuo-xin,WANG Ke-qin,LI Qiu-fang,et al.Study on Contour Reverse-slope Terrace Controlling Soil and Water Loss and Nitrogen and Phosphorus Transfer in the Sloping Farmland[J].Research of Soil and Water Conservation,2013,20(01):1-8.
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Study on Contour Reverse-slope Terrace Controlling Soil and Water Loss and Nitrogen and Phosphorus Transfer in the Sloping Farmland
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 01
Page number:
1-8
Column:
Public date:
2013-02-28
- Title:
- Study on Contour Reverse-slope Terrace Controlling Soil and Water Loss and Nitrogen and Phosphorus Transfer in the Sloping Farmland
- CLC:
- S157.2
- DOI:
- -
- Abstract:
- An experiment was conducted on a slope cropland in Jianshan River basin, a typical catchment in the area of Fuxian Lake, the contour reverse-slope terrace was built in the typical catchment area of the tobacco field. The dynamic characteristics of nitrogen/phosphorus horizontal and vertical transfer in the sloping farmland from 2007 to 2008 were monitored under the condition of natural rainfall. The results showed that:(1) under the function of the contour reverse-slope terrace, it clearly reduced about 61.9% of the surface runoff and decreased 77.4% of soil erosion rate, and the events of erosion were reduced by 18 events, in the single rainfall event, the runoff and soil erosion control rate was 71.27% and 84.13%, respectively, the latter one has better function; (2) the control rates of transfer flux of TN, NO3--N and TP in the runoff were 51.04%, 45.77% and 57.40%, respectively, the control rates of transfer flux in the runoff soil TN, hydrolysis N,TP and available P were 81.10%, 90.93%, 92.37% and 88.00%; (3) there was no difference between the TN concentration and the soil deep in the soil layer from 0 to 110 cm of sloping land, but it was different in the soil layer from 0 to 200 cm in the level terrace surface, the TN concentration increased in the soil layer from 0 to 50 cm in the level terrace surface, it was 1.03～2.19 times of sloping farmland, the total nitrogen concentration in the soil deep of 0—50 cm has a high reaction to the contour reverse-slope terrace; under the condition of different rainfall intensity and different fertilizer levels, there was difference between nitrogen and phosphorus transfer concentrations in the different soil layers, this measure can reduce or increase the transfer concentration.
- References:
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