Associação milho-forrageira em Rolim De Moura, Rondônia

Abstract

The purpose of this study was to evaluate interspecific competition with maize sowing 21 days after the establishment of forages, for the formation of the maize-forage consortium or association, using hybrid S1 Geneze 'safrinha' maize with forages: Brachiaria brizantha cv. Marandu; Brachiaria brizantha cv. Piatã; Brachiaria humidicola cv. Llanero and Panicum maximum cv. Mombasa, and its monocultures, in randomized blocks. Regarding interspecific competition, the Marandu and Mombaça grasses did not allow the development of corn beyond the V5 phenological stage, which did not happen with the Piatã and Llanero cultivars. The corn-Llanero association caused reductions in dry matter productivity for both crops. The maize-Piatã association, on the other hand, did not negatively influence the productivity of forage, but reduced that of corn by 59.7%. The competitive conditions between the plant associations generated different effects in relation to height. Considering the corn (186.5 cm) and Llanero (104 cm) monocultures, the association of these plants promoted a 53% reduction in forage height, but did not significantly affect that of the cereal. The opposite was observed when in the presence of Piatã grass, which did not have a significantly reduced height (141.5 cm), however significantly reduced that of corn (164 cm). These associations did not affect the mass of 100 grains and the insertion of the 1st ear, but significantly reduced stem diameter, number of grains and grain yield adjusted to 15.5% humidity. The higher harvest index of the

Disminución en la ocurrencia de malezas en el cultivo de maíz asociando con Urochloa ruziziensis

“…Cuando aparecían las malas hierbas no se realizó la limpieza del cultivo justamente porque era una de las determinaciones. La cosecha se realizó cuando la planta cumplió su estadio fenológico, aproximadamente a los 120 días después de la emergencia (Perles et al, 2020). Los parámetros evaluados fueron Masa verde de malezas (Mg ha -1 ), se utilizó un cuadro de PVC de dimensión 1 m 2 , extrapolando posteriormente a Mg ha -1 , el cuadro fue lanzado al azar en cada tratamiento y repetición, mencionando que para la evaluación a los 50 y 70 días se eligió aleatoriamente otra zona de la UE, para el efecto se colectaron las malezas ubicadas dentro del cuadro y se pesaron, para el pesaje de malezas se utilizó una balanza de 0,005 gramos de precisión (Servín Niz et al, 2022).…”

Urochloa brizantha E Andropogon gayanus EM MONOCULTIVO E CONSÓRCIO SOB DIFERENTES NÍVEIS DE ADUBAÇÃO

“…Entretanto, fatores limitantes as altas produtividades de matéria seca é o manejo inadequado da forrageira e do solo. Assim, a maior parte das áreas de pastagens se encontram degradadas, principalmente no bioma Cerrado, onde o inverno é seco e as chuvas são distribuídas de forma irregular, a produção agrícola pode se tornar inviável em condições de sequeiro (CORRÊA et al, 2020).…”

Establishment of paiaguas palisadegrass in monoculture or in an integration system with other crops

“…In intercropped environments, there is an interspecific competition for light and nutrients that may modify the establishment of the used cultures (4) . The competition for light may alter the rates of growth and development of the forage and thus its tillering dynamics, its sward structure (3) , and its forage production (5) .…”