PRÁCTICAS AGROECOLÓGICAS PARA DISMINUIR LAS AFECTACIONES DEL ARROZ ROJO. ROTACIÓN CON GIRASOL (Heliantus annus L) Y LABOREO DEL SUELO.

In "Los Palacios" Rice Research Station from the National Institute of Agricultural Sciences (INCA), within 1999-2001 period, the present work was developed under a Randomized Block design with four repetitions, where two new agroecological practices as an alternative solution were proved to chemically control red rice. The annual rice-sunflower rotation was common to both practices; after sunflower cultivation, the soil was subjected to a different management to diminish red rice seed reserves. One treatment was dry farming encouraging germination and removing plants. The other one was flooding soil for 30 days, encouraging germination and preparing the soil by the continuous mud technology. Results were compared with the soil management given to productive practice, consisting of: chemical disinfection and preparation without controling red rice. The rice-sunflower rotation and dry soil farming eliminated more than 98 % of the mixture and increased commercial rice yield from 1.1 to 5.1 t·ha-1. Profits surpassed 1 200.00 pesos·ha-1. [ABSTRACT FROM AUTHOR]