LA COMPETENCIA DEL ARROCILLO (Echinochloa colonum) CON LA BATATA (Ipomoea batatas)

To determine the competitive effect of different population densities of junglerice (Echinochloa colonum (L.) Link.) on the yield of sweet potatoes (Ipomoea batatas (L.) Lam), four experiments were conducted at the Isabela and Juana Diaz Research and Development Centers during 1981 and 1982. At both localities each experimental plot consisted of four rows 6.1 m long and 1.22 m apart. Miguela cultivar vines were planted on top of the ridge. During 1981, sweet potatoes yield was not affected significantly by junglerice competition at a population density of 10 plants per square meter at Isabela. In the same year, when sweet potatoes were growing with jungle-rice population densities ranging from 21 to 42 plants/m2 at Isabela, and 17 to 68 plants/m2 at Juana Diaz, the yields were reduced drastically. During 1982, sweet potatoes yields were not reduced significantly by the lower junglerice densities (1.4, 3.0 and 6.0 plants/m2 at Isabela, 5.0 and 9.0 plants/m2 at Juana Diaz). Junglerice population densities of 18 and 37 plants/m2 at Juana Diaz, reduced sweet potatoes yield during 1982. ----- Se determinó el efecto de la competencia del arrocillo (Echinochloa colonum (L.) Link) a diferentes densidades poblacionaléSSObre""" eTrendimiento de la batata (Ipomoda batata (L.) Lam) en cuatro ensayos realizados en los Centros e Investigación y Desarrollo de Isabela y Juana D1az durante 1981 y 1982. En ambas localidades cada parcela experimental consistió de 4 hileras de 6.1 m de largo, espaciadas a 1.22 m. En cada siembra se utilizó material vegetativo de la variedad de batata Miguela. En 1981, la única densidad del arrocillo que no afectó significativamente el rendimiento de batatas, en comparación con el testigo desyerbado fue la de 10 plantas por metro cuadrado (plantas/m2 en Isabela. Cuando la batata creció junto al arrocillo a densidades de 21, 31 y 42 plantas/m2 en Isabela y de 17, 33, 50 y 68 plantas/m2 en Juana D1az, el rendimiento de batatas disminuyó drásticamente. En 1982, el arrocillo a densidades de 1.4, 3.0 y 6.0 plantas/m2 en Isabela y de 5.0 y 9.0 plantas/m2 en Juana D1az, respectivamente, no lo disminuyó. Las densidades de 18 y 37 en Juana Diaz disminuyeron significativamente el rendimiento de batatas en 1982.


Issue Date:
Sep 11 1983
Publication Type:
Conference Paper/ Presentation
Language:
Spanish
Total Pages:
10




 Record created 2017-08-10, last modified 2017-08-29

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