Abstract

BAS-NAHAS, S.S.  and  ROMERO, E.R.. Influence of thermal factor on chickpea (Cicer arietinum L.) development, yield and yield components. Rev. agron. noroeste arg. [online]. 2020, vol.40, n.1, pp.39-50. ISSN 0080-2069.

In Argentina, chickpea (Cicer arietinum L.) sowing date may take place any time between April and June, with crop yield ranging from 1200 to 3000 kg/ha. The distinct environmental scenarios that are set up by different sowing dates exert an important influence on the development of the phenological phases, the behavior of yield components, and yield. Temperature stands out as one of the main factors causing these variations, as its behavior changes over time and space. The impact of the thermal factor on the phenology, yield components, and yield of chickpea crops grown without water constraints was evaluated in a trial with a completely randomized design with 4 replications, where sowing dates were April 15, June 14, July 7, and August 5 (year 2016). Yield components and yield were assessed prior to harvest, and an index of adverse temperature events (IATE) was created to measure the severity and duration of such events. Significant differences were observed in the duration and occurrence of phenological phases, yield components, and yield, as well as in accumulated IATE values. Crops sown on April 15 presented higher seed weight and number, collected from more abundant branches with fewer pods, but with a higher number of large caliber seeds. Later sowing dates led to significant yield reductions

Keywords : Chickpea; Phenology; Temperature; Yield component.

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