Response of upland rice to phosphorus in an ultisol in the humid forest zone of West Africa

Sahrawat, K L and Jones, M P and Diatta, S (1995) Response of upland rice to phosphorus in an ultisol in the humid forest zone of West Africa. Fertilizer Research, 41 (1). pp. 11-17. ISSN 0167-1731

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Abstract

Phosphorus (P) deficiency is one of the major limiting factor for crop production in highly weathered soils in the humid tropics. Field experiments were conducted for two years (1992 and 1993) to determine P response and efficiencies of upland rice cultivars in an Ultisol, low in available P, in the forest zone of Cote d'Ivoire. The rice cultivars tested were selected from a large number of entries tested earlier for acidity tolerance. Grain yields of the cultivars were significantly increased by P application. There was little further response in grain yield at higher rates than 60 kg P ha -1. The rice cultivars differed in agronomic and physiological P efficiencies and the efficiencies were higher at lower rates of R The rooting depths of the cultivars were increased by application of P at the lowest application rate (30 kg P ha-1).The results suggest that P fertilization of soil acidity-tolerant upland rice cultivars can significantly improve the productivity of the ultisols.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Others > Agriculture-Farming, Production, Technology, Economics
Depositing User:	Mr B K Murthy
Date Deposited:	17 Nov 2011 03:38
Last Modified:	17 Sep 2013 11:28
URI:	http://oar.icrisat.org/id/eprint/3953
Official URL:	http://dx.doi.org/10.1007/BF00749515
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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