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Physiological Analysis of Yield Variation in Hybrid Maize Varieties During Rabi Season

Md. Abdul Aziz
PSO
Agronomy Division, Gazipur

A.K.M.M. Rahman
SSO
Agronomy Division, Gazipur

Abstract/ Executive Summary:

To understand the agro-ecological variation among seasons as well as physiological reasons for difference in growth, dry matter production and yield of hybrid maize varieties, an experiment was conducted at Joyebpur during the period from November 2006 to April 2007. Seven hybrid maize varieties such as BARI hybrid maize 2, BARI hybrid maize 3, BARI hybrid maize 5, Pacific 11, Pacific 60, Pacific 984 and Proline were included in the study with three replications. Higher yield of 10.32 t/ha was obtained from Pacific 60 which was identical with BARI hybrid maize 3 (10.03 t/ha) and BARI hybrid maize 5 (9.85 t/ha). The lowest yield (7.87 t/ha) was obtained from Proline. The higher yield in Pacific 60 followed by BARI hybrid maize 3 and BARI hybrid maize 5 was attributed to maximum source capacity, total dry matter production, highest CGR and RGR with maximum grain growth duration that enhance maximum cob number per plant, cob size and grain per cob.

Keywords: Physiological analysis, Yield variation , Hybrid maize, Rabi season

Location: Joyebpur

Start Date: 22-11-2006

End Date: 00-03-2007

Program Area: Variety and Species

Commodity: Maize

Objectives:

To under stand the influence of season and location specific environmental effect on growth, dry matter production and yield of hybrid maize in terms of physiological parameters and their relationship among seasons.

Methodology:

The experiment was conducted at the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during the period from November 2006 to March 2007. The trial was laid out in a RCB design with three replications. Seven hybrid maize varieties were included in the study. These were: BARI hybrid maize 2, BARI hybrid maize 3, BARI hybrid maize 5, Pacific 11, Pacific 60, Pacific 984 and Proline. Seeds were sown on 22 November 2006 with 75cm x 20 cm spacing. The unit plot size was 4.5m x 4m. Fertilizers @ 250-60-100-30-5-1 kg/ha N, P, K, S, Zn and B respectively were applied. Half of N and all other fertilizers were applied as basal before sowing. The remaining half of N was applied in two splits at 25 and 55 days after emergence (DAE). Other intercultural operations such as weeding, thinning, irrigation, pesticide application were done as and when necessary. The data were collected on leaf area, dry weight of leaf and stem, total dry matter production, crop growth rate (CGR), relative growth rate (RGR), grain growth duration, plant height, cob per plant, grain per pod, 1000-grain weight and grain yield. Collected data were statistically analyzed following "MSTAT" program. The differences between the means were compared using the DMRT.

Source of Information: Annual Report, Agronomy Division 2006-2007, BARI

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget: 20,000/-

Total Budget (Tk.) : 20,000/-

Achievement/Findings:

Higher yield of 10.32 t/ha was obtained from Pacific 60 which was identical with BARI hybrid maize 3 (10.03 t/ha) and BARI hybrid maize 5 (9.85 t/ha). The lowest yield (7.87 t/ha) was obtained from Proline. The higher yield in Pacific 60 followed by BARI hybrid maize 3 and BARI hybrid maize 5 was attributed to maximum source capacity, total dry matter production, highest CGR and RGR with maximum grain growth duration that enhance maximum cob number per plant, cob size and grain per cob

Knowledge Management: Report/Proceedings