Root morphology, hydraulic conductivity and plant water relations of high-yielding rice grown under aerobic conditions

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Published online 2011 August 1. doi: 10.1093/aob/mcr184

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Table 4.

Root growth characteristics in the different water regimens (pot experiment)

	Total root length (km hill⁻¹)	Root number (hill⁻¹)	Individual root weight (mg root⁻¹)	Individual thick root length (m root⁻¹)	Specific root length (m g⁻¹)	Fine : thick root ratio
Flooded	8·2^a	1044^a	10·0^b	0·87^b	797^a	8·23^a
Aerobic30	3·5^b	537^b	12·9^a	1·14^ab	506^b	4·72^b
Aerobic80	2·6^b	420^b	12·9^a	1·23^a	489^b	4·13^b
Aerobic30/flooded	43 %	51 %	129 %	130 %	63 %	57 %
Aerobic80/flooded	32 %	40 %	128 %	141 %	61 %	50 %

Means followed by the same superscript letter within columns are not significantly different (P < 0·05).

In aerobic30 and aerobic80 treatments, irrigation was applied when the soil water potential reached –30 kPa and –80 kPa, respectively.

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