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Winter wheat roots grow twice as deep as spring wheat roots, is this important for N uptake and N leaching losses?

Thorup-Kristensen, Kristian; Cortasa, Montserrat Salmerón and Loges, Ralf (2009) Winter wheat roots grow twice as deep as spring wheat roots, is this important for N uptake and N leaching losses? Plant and Soil, 322, pp. 101-114.

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Summary

Cropping systems comprising winter catch crops followed by spring wheat could reduce N leaching risks compared to traditional winter wheat systems in humid climates. We studied the soil mineral N (Ninorg) and root growth of winter- and spring wheat to 2.5 m depth during three years. Root depth of winter wheat (2.2 m) was twice that of spring wheat, and this was related to much lower amounts of Ninorg in the 1 to 2.5 m layer after winter wheat (81 kg Ninorg ha-1 less). When growing winter catch crops before spring wheat, N content in the 1 to 2.5 m layer after spring wheat was not different from that after winter wheat. The results suggest that by virtue of its deep rooting, winter wheat may not lead to high levels of leaching as it is often assumed in humid climates. Deep soil and root measurements (below 1 m) in this experiment were essential to answer the questions we posed.


EPrint Type:Journal paper
Subjects: Soil > Nutrient turnover
Farming Systems > Farm nutrient management
Crop husbandry
Environmental aspects > Air and water emissions
Research affiliation: Denmark > DARCOF III (2005-2010) > VEGQURE - Organic cropping Systems for Vegetable production
DOI:DOI: 10.1007/s11104-009-9898-z
Deposited By: Thorup-Kristensen, Professor Kristian
ID Code:16121
Deposited On:11 Sep 2009 08:21
Last Modified:12 Apr 2010 07:40
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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