[1]TIAN Tai-qiang,HE Bing-hui,HUANG Wei.Characteristics of Runoff and Sediment Production under Different Fertilization and Tillage Patterns in Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2014,21(01):61-65,70.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 01
Page number:
61-65,70
Column:
Public date:
2014-02-28
- Title:
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Characteristics of Runoff and Sediment Production under Different Fertilization and Tillage Patterns in Three Gorges Reservoir Area
- Author(s):
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TIAN Tai-qiang, HE Bing-hui, HUANG Wei
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Key Laboratory of Eco-environments in Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing 400715, China
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- Keywords:
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Three Gorges Reservoir Area; different fertilization; sediment; runoff
- CLC:
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S157.2
- DOI:
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- Abstract:
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In order to reduce soil and water loss in sloping fields and reduce agricultural non-point source pollution, based on the long term(2010—2012) in site runoff plots observation experiment with the treatments of CK(T0),combined application of manure and fertilizer(T1),chemical fertilizer(T2),chemical fertilizer with increasing fertilization(T3),and contour plowing with chemical fertilizer(T4) in the cropping of winter wheat-summer maize, the characteristic of runoff and eroded sediment under different fertilization and tillage patterns were studied. Result were as follows: (1) the runoff in May accounted for 16.39%~21.96%,and the erosion amount accounted for 12.53%~25.56% of the entire observation time,the minimum erosive rainfall is 20.5mm; (2) under different fertilization and tillage patterns,the rainfall,runoff volume and erosion rate showed a linear relationship(y=ax+b, a > 0),the erosion of changes was driven by runoff, fertilization affected soil erosion and runoff by changing the physical and chemical properties of and crop ground cover; (3) changes of the total runoff and erosion had the same trend in different fertilization and tillage patterns, total amount of runoff and erosion showed in different fertilization levels as tbe order of T0 > T1 > T3 > T2,total amount of runoff and erosion amount showed different tillage modes as the sequence of T2 > T4.The result suggested that contour plowing and chemical fertilizer could significantly reduce runoff and soil erosion,which is an effective way to control soil erosion in Three Gorges Reservoir Area.