01824naa a2200241 a 450000100080000000500110000800800410001902400350006010000190009524501140011426000090022852011380023765000090137565000100138465000160139465000170141065000180142765000160144565000170146170000180147870000180149677300680151412165292022-06-02       2008    bl uuuu     u00u1 u    #d7 a10.1080/019041608019284712DOI1 aFAGERIA, N. K.  aDry matter and yield of lowland rice genotypes as influence by nitrogen fertilization.h[electronic resource]  c2008  aRice is a staple food for more than 50% of the world's population and nitrogen (N) is one of the most yield limiting nutrients in lowland rice ecosystems. A field experiment was conducted for two consecutive years to evaluate dry matter production and grain yield of 12 lowland rice genotypes (BRS Jaçanã, CNAi 8860, BRS Fronteira, CNAi 8879, CNAi 8880, CNAi 8886, CNAi 8885, CNAi 8569, BRSGO Guará, BRS Alvorada, BRS Jaburu, and BRS Biguá) at five N rates (0, 50, 100, 150, and 200 kg ha-1). Genotypes showed significant variation in grain yield and shoot dry weight. Genotype BRSGO Guar´a was highest yielding, whereas genotype BRS Jaburu was lowest yielding and the remaining genotypes were intermediate in grain yielding potential. Grain yield and shoot dry weight were having significant quadratic increase with increasing N rates in the range of 0 to 200 kg ha-1. However, 90% of the maximum yield is often considered as an economical rate, which was 120 kg for shoot dry weight and 136 kg N ha-1 for grain yield. Shoot dry matter was having significant positive quadratic association with grain yield across 12 genotypes.  arice  aArroz  aEcossistema  aFertilizante  aMatéria Seca  aNitrogênio  aOryza Sativa1 aSANTOS, A. B.1 aCUTRIM, V. A.  tJournal of Plant Nutritiongv. 31, n. 4, p. 788-795, Apr. 2008.