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Assessing root penetration ability and resource capture from deeper soil layers
Wade, LJ and Cruz, RT and Siopongco, J and Moroni, S and Samson, BK and Acuna, T, Assessing root penetration ability and resource capture from deeper soil layers, Methodologies for root drought studies in rice, International Rice Research Institute, HE Shashidhar, A Henry and B Hardy (ed), Los Banos (Philippines), pp. 34-39. ISBN 978-971-22-0290-2 (2012) [Research Book Chapter]
Copyright 2012 International Rice Research Institute (IRRI). Licenced under Creative Commons Attribution Attribution-NonCommercial-ShareAlike 3.0 License (Unported)(CC BY 3.0) http://creativecommons.org/licenses/by/3.0/
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Rice crops commonly encounter zones of restricted root access, which can greatly reduce uptake of resources from deeper soil layers. As a result, yield can decrease with greater vulnerability to fluctuating weather conditions, especially under rainfed systems (Samson eta al 2002). Root access can be restricted by hardpan formation during cultivation, smearing during puddling, or sudden changes in soil texture with depth. These zones of higher soil strength and increased impedance to root elongation are not uniform across the field, so repeatable screens involving the placement of a paraffin wax/petroleum jelly layer in a soil column have been sued to identify promising lines (Yu et al 1995, Ray et al 1996, Babu et al 2001, Clark et al 2000, 2002). Field validation is still essential (Samson et al 2002).
|Item Type:||Research Book Chapter|
|Research Division:||Agricultural, Veterinary and Food Sciences|
|Research Group:||Crop and pasture production|
|Objective Division:||Plant Production and Plant Primary Products|
|Objective Group:||Grains and seeds|
|UTAS Author:||Acuna, T (Professor Tina Acuna)|
|Deposited By:||Agricultural Science|
|Downloads:||225 View Download Statistics|
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