Root growth and drought resistance of rice as affected by P placement in acid soil

A field experiment was conducted in Cavinti, Laguna [Philippines] during the 1988 wet season to determine the effect of P fertilization depth on growth and drought resistance of IR64. Four P treatments were imposed: (1) no P applied; (2) shallow, 50 kg P/ha applied as triple superphosphate between p...

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Bibliographic Details
Published inPhilippines Journal of Crop Science Vol. 14
Main Authors Siopongco J, Bueno F.D, Ingram K.T
Format Journal Article
LanguageEnglish
Published 1989
Subjects
abonos fosfatados
acid soils
aplicacion de abonos
drought resistance
engrais phosphate
fertilisation
fertilizer application
filipinas
oryza sativa
philippines
phosphate fertilizers
racine
raices
resistance a la secheresse
resistencia a la sequia
roots
sol acide
suelo acido
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Summary:A field experiment was conducted in Cavinti, Laguna [Philippines] during the 1988 wet season to determine the effect of P fertilization depth on growth and drought resistance of IR64. Four P treatments were imposed: (1) no P applied; (2) shallow, 50 kg P/ha applied as triple superphosphate between pairs of rice rows in the top 5 cm of soil; (3) deep, 50 kg P/ha applied as TSP in bands between pairs of rice rows at 25 cm soil depth; (4) shallow plus deep, 25 kg P/ha banded in the top 5 cm of soil plus 25 kg P/ha placed at 25 cm soil depth. Rice grown with P placed at 25 cm soil depth had more roots in lower, wetter soil layers and performed better during drought. Rice with deep P also had a greater ratio of deep-root to shoot dry weight. Deep placed P had the highest grain yield and biomass at harvest.
Bibliography:F
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ISSN:0115-463X