Title of article :
Prediction of the soil-depth salinity-trend in a vineyard after sustained irrigation with saline water
Author/Authors :
W.P. de Clercq، نويسنده , , O. Van Cleemput and M. Van Meirvenne ، نويسنده , , M.V. Fey، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
10
From page :
395
To page :
404
Abstract :
Remote sensing combined with an ability to look deeper than the soil surface is currently high in demand. This study was conducted through scaling down the amount of soil data from a saline irrigation water experiment to see if one can still capture the essential soil salinity depth trends within the data, to a level that can enhance the ability of remote methods. A saline irrigation experiment with 6 water qualities was conducted for 8 years on 1.2 ha of vineyard land near Robertson in the Western Cape Province of South Africa. Soil water was sampled at regular intervals at 5 depths between 0.15 and 1.2 m with suction cup lysimeters at a fixed time following each irrigation. Electrical conductivity of the soil water (ECsw) was determined after sampling. Data collected over the full 8-year period were investigated for depth trends in ECsw, seeking trend lines with lowest polynomial order that were still significantly predict the salinity profile. At all treatment levels a first order polynomial equation, fitted to the salinity profiles, significantly predicted the salinity trends. The ECsw value at only two depths could therefore be used to calculate total salt accumulation and soil water quality below the root zone. The implication is that considerable value can be obtained from minimal measurements both in estimating salt accumulation in the soil profile and predicting water quality in return flow from saline irrigation.
Keywords :
Grapevines , Suction cup lysimetry , Salt accumulation , Soil salinity profiles , Sustainable irrigation , Trend surface analysis
Journal title :
Agricultural Water Management
Serial Year :
2009
Journal title :
Agricultural Water Management
Record number :
1325968
Link To Document :
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