Optimization of cultivar sowing density of rice hybrids
DOI:
https://doi.org/10.5965/223811711732018523Keywords:
Oryza sativa L., plant population, grain quality, rice productionAbstract
The objective of this study was to evaluate the productivity and quality of grains under different sowing densities in irrigated rice hybrids. The hybrids BRSCIRAD 302 and BRSCIRAD AH703 CL were analyzed at sowing densities of 10, 20, 30 and 40 kg ha-1, in the municipalities of Capão do Leão and Capivari do Sul, in the state of Rio Grande do Sul. The characteristics assessed were: productivity, components of grain production, agronomic characteristics, industrial and commercial quality of irrigated rice grains. The data were submitted to analysis of variance and F test, using for the comparison of hybrids the Tukey test at a 5% significance level, and for sowing, density regression analysis was applied. Sowing densities of 20 kg ha-1 and higher show no effect on productivity. The grain quality of hybrids is not influenced by the variation in sowing density, and reduction in sowing density up to 10 kg ha-1 does not affect the commercial quality of the grains. Thus, it is possible to recommend the cultivation of irrigated rice hybrids with reduced sowing densities, starting from 20 kg ha-1, without affecting grain yield and quality.
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AHMAD S et al. 2009. Morphological and quality parameters of Oryza sativa L. as affected by population dynamics, nitrogen fertilization and irrigation regimes. Pakistan Journal of Botany 41: 1259-1269.
AKHTER M et al. 2007. Hybrid rice research and developments in Pakistan. Asian Journal of Plant Sciences 6: 795-801.
BRASIL. 2009. Ministério da Agricultura, Pecuária e Abastecimento. Regras para análise de sementes. Brasília: MAPA/ACS. 399p.
CHEN F et al. 2003. Improving rice quality through crop and resource management. In: MEW TW et al. (Eds.). Rice science: innovations and impact for livelihood. Beijing, China: Proceedings of the International Rice Research Conference. p. 479-486.
COUTINHO AR et al. 2011. Redução da densidade de plantio como alternativa para o aumento da competitividade de cultivares de arroz híbrido no mercado gaúcho. In: VII Congresso Brasileiro do Arroz Irrigado: Racionalizando recursos e ampliando oportunidades. Resumos.... Balneário Camboriú: SOSBAI. p.793-796.
CRUSCIOL CAC et al. 2000. Produtividade do arroz irrigado por aspersão em função do espaçamento e da densidade de semeadura. Pesquisa Agropecuária Brasileira 35: 1093-1100.
GOULART E da S et al. 2015. Performance of rice hybrids determined by different planting arrangements. Ciencia e Inestigacíon Agraria 42: 75-83.
GRiSP. 2013. Global Rice Science Partnership. Rice almanac, 4th edition. Los Baños (Philippines): International Rice Research Institute. 283p.
HÖFS A et al. 2004. Efeito da qualidade fisiológica das sementes e da densidade de semeadura sobre o rendimento de grãos e qualidade industrial em arroz. Revista Brasileira de Sementes 26: 54-62.
LIN XQ et al. 2009. Effect of plant density and nitrogen fertilizer rates on grain yield and nitrogen uptake of hybrid rice (Oryza sativa L.) Journal of Agricultural Biotechnology and Sustainable Development 1: 44-53.
LIMA E do V et al. 2010. Participação do colmo principal e dos afilhos na produtividade do arroz irrigado, em função da densidade de semeadura. Bragantia 69: 387-393.
MARCHEZAN E et al. 1993. Relações entre a época de semeadura, de colheita e rendimento de grãos inteiros de cultivares de arroz irrigado. Pesquisa Agropecuária Brasileira 28: 843-848.
MIELEZRSKI F et al. 2008. Desempenho em campo de plantas isoladas de arroz híbrido em função da qualidade fisiológica das sementes. Revista Brasileira de Sementes 30: 139-144.
PARISOTTO E. et al. 2013. Avaliação do rendimento de grãos em função de diferentes densidades de semeadura em quatro híbridos de arroz. In: Congresso Brasileiro de Arroz Irrigado, 8. Anais.... Santa Maria: UFSM. p. 1324-1327.
PLANETA ARROZ. 2015. Qualidade do arroz produzido no Brasil ajuda a conquistar novos mercados. Disponível em: http://www.planetaarroz.com/site/noticias_detalhe.php?idNoticia= 13658. Acesso em: 04 Set. 2015.
QIN J et al. 2013. Integrated nutrient, water and other agronomic options to enhance rice grain yield and N use efficiency in double-season rice crop. Field Crops Research 148: 15-23.
SOFIATTI V et al. 2006. Efeitos de regulador de crescimento, controle de doenças e densidade de semeadura na qualidade industrial de grãos de arroz. Ciência Rural 36: 418-423.
SOSBAI. 2014. Sociedade Sul-Brasileira de Arroz Irrigado. Arroz irrigado: recomendações técnicas da pesquisa para o Sul do Brasil. XXX Reunião Técnica da Cultura do Arroz Irrigado. Bento Gonçalves: SOSBAI. 192p.
TAN Y et al. 2002. Physicochemical properties of an elite rice hybrid. Journal of the Science of Food and Agriculture 82: 1628-1636.
UPHOFF N & RANDRIAMIHARISOA R. 2002. Reducing water use in irrigated rice production with the Madagascar System of Rice Intensification (SRI). In: BOUMAN BAM et al. (Eds.). Water-wise rice production. Proceedings of the International Work-shop on Water-wise Rice Production, 8-11 April 2002, Los Baños, Philippines. Los Baños (Philippines): International Rice Research Institute. p. 71-87.
WANG D et al. 2014. Optimizing hill seeding density for high-yielding hybrid rice in a single rice cropping system in south China. PLoS ONE 9: e109417.
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