Resumo

POLON-PEREZ, Ricardo et al. Effect of Water Stress on Rice Regrowth Crop. Second Part. Rev Cie Téc Agr [online]. 2019, vol.28, n.3, e03.  Epub 29-Abr-2019. ISSN 2071-0054.

The research was conducted at "Los Palacios" Scientific and Technological Base Unit, from 2014 to 2017, on a Gleysol Nodular Ferruginous Petroferric soil, to evaluate the effect of water stress on the yield in the regrowth crop in a variety of short -cycle rice INCA LP-5. The results showed that in the new variant of water managing (water stress with ratoon), the highest agricultural and industrial yields of the grain were obtained. They ranged between 4,0 and 5,8 t.ha-1 and 62,3 and 63 , 9% of whole grains, respectively, for the plant cutting height of 5 cm. The lowest agricultural and industrial yields ranged between 3,0 and 3,4 t.ha-1 and 58,6 and 61 , 1% of whole grains, respectively, for the plant cutting height of 20 cm (control), during the four years that the research was carried out. Similar behavior presented the number of panicles per square meter; while the water consumption and the industrial quality of the grain was lower in the variant with water stress, which represents a saving for the concept of irrigation water economy, and a fundamental parameter that decides whether a rice variety is commercially accepted.

Palavras-chave : rice; water; whole grains; quality.

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