Iron and nitrogen interactions in groundnut nutrition

Ali, Z I and Malik, E M A and Babiker, H M and Ramraj, V M and Sultana, A and Johansen, C (1998) Iron and nitrogen interactions in groundnut nutrition. Communications in Soil Science and Plant Analysis, 29 (17-18). pp. 2619-2630. ISSN 0010-3624

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Abstract

A pot experiment was conducted to estimate the levels of iron (Fe) needed to correct Fe-deficiency chlorosis in groundnut grown in an alkaline soil and to study Fe × nitrogen (N) interactions in soil and plant and their associated effects on growth and yield. Four levels of Fe (0, 2.5, 10, and 25 mg Fe/kg soil as Fe-EDDHA) and two levels of N (0 and 100 mg N/kg soil as NH4NO3) were applied factorially in a completely randomized block design. Higher rates of 10 and 25 mg Fe/kg caused a significant reduction in leaf area and aerial biomass accumulation irrespective of N treatment. The Fe × N interaction was significant for all of these parameters. Specific leaf area increased at higher levels of Fe application. Higher Fe levels induced symptoms suggestive of manganese (Mn) deficiency. This diagnosis was supported by decreasing concentration of Mn in leaf blades with increasing Fe levels. By contrast concentrations of most other elements in leaf blades increased with increasing levels of Fe application, suggestive of plant growth but not uptake of other elements being reduced by Mn deficiency

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Mandate crops > Groundnut
Depositing User:	Mr B K Murthy
Date Deposited:	10 Feb 2014 04:55
Last Modified:	10 Feb 2014 04:55
URI:	http://oar.icrisat.org/id/eprint/7485
Official URL:	http://dx.doi.org/10.1080/00103629809370138
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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