Llenado y secado del grano de híbridos comerciales de maíz en la Pampa Ondulada: Efectos de la fecha de siembra

YÉSICA DANIELA CHAZARRETA ; JUAN IGNACIO AMAS; MARIA ELENA OTEGUI

Pergamino

Congreso; XI Congreso Nacional de Maíz "Sea Maíz" Integrando ciencia, producción, ambiente y comunidad.; 2018

A.I.A.N.B.A, INTA, UNNOBA

Sowing date (Sw) modifies the environmental conditions to which maize crops are exposed during grain filling and after physiological maturity (PM). The objective of this work was to characterize the patterns of kernel filling and kernel desiccation in a set of 4 hybrids when grown at two contrasting environments, an early (ESw: 31-Oct) and a late (LSw: 28-Dec) Sw. Individual kernel weight (KW), kernel filling rate (KFR), total duration of kernel filling (KFD),kernel desiccation rates before (b1) and after (b2) PM, and the breakpoint between these rates (x1) were computed for each treatment combination. Delayed Sw exposed the crop to reduced mean temperature and solar radiation after flowering. Also caused a 14.6% reduction in final KW (p