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Genotypic Variation on Growth, Photosynthesis, Nutrient Uptake and Yield of Different Hybrid Maize

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

M.S.A. Khan
SSO
Agronomy Division, Gazipur

Abstract/ Executive Summary:

A field experiment was undertaken at BARI Research Farm, Gazipur to find out the genotypic variation of hybrid maize on growth, photosynthesis, nutrient uptake and yield. Four hybrid maize varieties i.e. BARI hybrid maize 5, BARI hybrid maize 3, Pacific 984 and Pacific 11 were used in the study as treatment variables. Genotypic variations showed great influence on total dry matter production (TDM), leaf area index (LAI), light transmission ratio(LTR), crop growth rate (CGR), net assimilation rate (NAR), yield components, yield and nutrient uptake efficiency. The CGR values increased progressively with time reaching peak at 40-60 DAS and thereafter declined till maturity. NAR showed a declining trend as the season progressed irrespective of variety after 60 DAS. Higher LAI with lower LTR values indicate the higher light interception in Pacific 984 and BARI hybrid maize 5, that reflects in higher TDM production in those varieties. Higher nutrient uptake was also observed in Pacific 984 and BARI hybrid maize 5. All these finally contributed to higher yield in Pacific 984 and BARI hybrid maize 5 than the other varieties.. The seed yield was significantly differed among the varieties. The highest seed yield (8.95 t/ha) was recorded in pacific 984, which was identical to BARI hybrid maize 5 (8.53 t/ha) and Pacific 11(8.51 t/ha). The lowest seed yield was (7.55 t/ha) recorded from BHM3.

Keywords: Genotypic variation, Growth, Photosynthesis, Nutrient uptake, Yield, Hybrid maize

Location: Joydebpur, Gazipur

Start Date: 00-00-2007

End Date: 00-00-2009

Program Area: Variety and Species

Commodity: Maize

Objectives:

To find out the genotypic variation on growth, development, physiological characters, nutrient uptake and yield of hybrid maize varieties.

Methodology:

The experiment was conducted at the central Research Station of Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur during rabi seasons of 2007-08 and 2008-09. The soil of the research area belongs to the Chhiata Series under AEZ-28.Four hybrid maize varieties (BARI Hybrid Maize -5, BARI Hybrid Maize -3, Pacific-984 and Pacific -11) were the treatment variables. The experiment was laid out in randomized complete block design with four replications. The unit plot size was 6m x 5m. Seeds of four hybrid maize were sown on 03 December 2007 and 14 December 2008. Fertilizers were applied at the rate of 250-55-100-30-5-1 kg/ha N, P, K, S, Zn and B as Urea, Triple super phosphate (TSP), Muriate of potash (MoP), Gypsum, Zinc Sulphate and Boric acid. One third of N, whole amount of TSP, MP, Gypsum, Zinc Sulphate and Boric acid was applied as basal. Remaining 2/3 N was top dressed at 35 and 60 days after sowing. Four irrigations were done at 15, 35, 60 and 90 DAS (Days after sowing).

Source of Information: Annual Report, Agronomy Division 2008-2009, BARI

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget: 15,000/-

Total Budget (Tk.) : 15,000/-

Achievement/Findings:

Results from the study revealed that genotypes of hybrid maize differed appreciably in total dry matter production, leaf area production, light transmission ratio, crop growth rate, net assimilation rate, yield and yield components and different nutrient uptake efficiency. With respect to hybrids, performance of Pacific 984 and BARI hybrid maize 5 were better than other two varieties.

Knowledge Management: Report/Proceedings