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Direct and residual fertilizer phosphorus effects on yield and phosphorus efficiency of upland rice in an Ultisol

OAR@ICRISAT

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Relation http://oar.icrisat.org/4530/
http://dx.doi.org/10.1023/A:1009716819647
 
Title Direct and residual fertilizer phosphorus effects on yield and phosphorus efficiency of upland rice in an Ultisol
 
Creator Sahrawat, K L
Jones, M P
Diatta, S
 
Subject Soil Science
Fertilizer Appications
 
Description Phosphorus (P) deficiency is one of the major limiting factors for crop production in highly weathered soils in the humid zone of West Africa. Very few studies have evaluated the residual value of fertilizer P to rice in these soils. Field experiments were conducted for three years (1993–1995) to determine the response of four upland rice cultivars to fertilizer P applied at 0, 45, 90, 145 and 180 kg P ha-1 only once in 1993, and to fertilizer P residues in 1994 and 1995. The soil at the experimental site, in the humid forest zone of Ivory Coast (West Africa), was an Ultisol, low in available P.
Grain yields of the rice cultivars were significantly increased by fertilizer P in 1993, and by the fertilizer P residues in 1994 and 1995 although the magnitude of response decreased with time since the fertilizer was applied. The cultivars differed in cumulative agronomic and physiological efficiencies, and the efficiencies were higher at the lower rates of P. The amounts of total P removed in three successive crops were similar for all the four rice cultivars although P harvest index was 10–12% higher in the P efficient than inefficient cultivars. The results suggest that the differences observed in the P efficiency of rice cultivars are due to differences in the internal efficiency of P.
 
Publisher Springer
 
Date 1997
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/4530/1/Nurient_Cycling_in_Agroecosystems_48_209-215_1997.pdf
Sahrawat, K L and Jones, M P and Diatta, S (1997) Direct and residual fertilizer phosphorus effects on yield and phosphorus efficiency of upland rice in an Ultisol. Nutrient Cycling in Agroecosystems, 48 (3). pp. 209-215. ISSN 1385-1314