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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 74, No. 3, 2014, pp. 257-262
Bioline Code: cj14038
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 74, No. 3, 2014, pp. 257-262

 en Physiologic characteristics of corn and Urochloa brizantha check for this species in other resources (Hochst. ex A. Rich.) R.D. Webster in intercropping cultivation
Rodrigues, Orismário L.; Galvão, João Carlos C.; Ferreira, Evander A.; Silva, Daniel V.; Santos, Márcia V.; Ferreira, Lino R.; Pereira, Rosana C. & Felipe, Rafael S.

Abstract

Competition between weeds and crops results in a lower availability of some resources to crop species, which causes deficiencies, such as water and nutritional deficiencies and low light quality or quantity. The aims of this study were to evaluate the effects of Urochloa brizantha check for this species in other resources (Hochst. ex A. Rich.) R.D. Webster, cv. Xaraés (brachiaria) emergence times comparing with corn ( Zea mays check for this species in other resources L.), in addition to the fertilization and application of different nicosulfuron and atrazine herbicides levels, on the physiological characteristics of intercropped species. The physiological characteristics Brachiaria plants that were treated with herbicides were negatively affected. The emergence time of Brachiaria plants in comparison with corn altered the physiological characteristics of both. The Brachiaria plants that emerged before corn presented higher photosynthetic and transpiration rates and reduced the intensity of these characteristics in corn. Thus, the Brachiaria plants that emerged before the corn crop presented a higher physiological efficiency, and they were more competitive than the weeds that emerged during other seasons.

Keywords
Atrazine; competition; fertilizing; intercropping; nicosulfuron; Zea mays

 
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