Effects of irrigation intensity on preferential solute transport in a stony soil

If irrigation intensity exceeds soil infiltration capacity, water may flow preferentially down cracks and large pores. In this situation, solute transport will involve only a fraction ( ) of the soil's water and leaching rate may be affected. To assess whether irrigation intensity affects prefe...

Full description

Saved in:
Bibliographic Details
Published in:New Zealand journal of agricultural research 2016-04, Vol.59 (2), p.141-155
Main Authors: Cichota, R, Kelliher, FM, Thomas, SM, Clemens, G, Fraser, PM, Carrick, S
Format: Article
Language:English
Subjects:
Analysis
Burns' equation
Irrigation
Leaching
Loam soils
lysimeter
nutrient loss risk
preferential flow
Soils
solute leaching
Solute movement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:If irrigation intensity exceeds soil infiltration capacity, water may flow preferentially down cracks and large pores. In this situation, solute transport will involve only a fraction ( ) of the soil's water and leaching rate may be affected. To assess whether irrigation intensity affects preferential solute flow, an experiment was performed at Lincoln using 12 steel-encased lysimeters with a Lismore Stony Silt Loam soil under two irrigation intensities, 5 and 20 mm h -1 . Burns' equation was used to describe the measurements of non-reactive tracer concentration as a function of drainage. Under dry antecedent moisture conditions, bromide transport was not significantly different under the different irrigation rates, even though strong preferential leaching occurred, with of 0.23. For chloride, was 0.85 and 0.58, for 5 and 20 mm h -1 respectively, sufficient evidence to confirm the effect of irrigation intensity (P 
ISSN:0028-8233
1175-8775
1175-8775
DOI:10.1080/00288233.2016.1155631