01691naa a2200205 a 450000100080000000500110000800800410001910000190006024500640007926000090014352011320015265000150128465000100129965000130130965000170132265000240133965300130136365300250137677300840140111071422002-05-07       1989    bl uuuu     u00u1 u    #d1 aFAGERIA, N. K.  aRice Cultivars Response to Phosphorus in Nutrient Solution.  c1989  aDue to widespread deficiency of phosphorus in acid soils iç various parts; of the world, germplasrn screening for identification of less susceptible cultivars of crop plants has hecome as essential as recommendation of proper methods and levels of P fertilization. To study the relationship between differential susceptibilíty to P deficiency, four cultivars of rice (Oryza sativa L.) were grown in nutrient solution at 8.06, 32.25, 322.58 gM (0.25, 1 and 10 ~LgP.m1-1) of applied P. After 54 days of growth in nutrient solution, dry matter yield of roots and shoots and P and K uptake were measured. Rice cultivars did not differ widely in dry matter production and P uptake. Among the growth parameters, shoot dry weight was the best parameter for classifying cultivars as to P efficieney. Based on this parameter, cultivars were classified for P efficiency in the order: IRAT 104 &gt Beira Campo &gt Bico Torto &gt Quatro Meses. Phosphorus uptake was increased with increasing concentrations of P in the growth medium. This study suggests that this methodology can be used for identification of P efficient rice cultivars.  aAbsorção  aArroz  aFósforo  aOryza Sativa  aSolução Nutritiva  aP uptake  aP-efficient cultivar  tPesquisa Agropecuária Brasileira, Brasíliagv. 24, n.6, p. 699-702, jun. 1989