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Effect of Planting Date on the Performance of Hybrid Maize Varieties in Aez-9

M S Rahman
Senior Scientific Officer,
Regional Agricultural Research Station, Jamalpur

M Salim
Professor
Dept. Agronomy, BAU, Mymensingh

M M Haque
Senior Scientific Officer
Plant breeding division, BARI, Gazipur

M R Ali
Regional Agricultural Research Station, Jamalpur

M Kadir
Regional Agricultural Research Station, Jamalpur

Abstract/ Executive Summary:

The hybrids Pacific-11, Pacific-60 and 900 M were better in terms of growth and yield at November 14 planting. BHM-3 showed better performance at October 29 planting but it was also showed better performance at November 14. Among the planting time, November 14 gave the highest grain yield followed by October 29 while stover yield was found highest at December 29 planting. After November 14, the grain yield decreased by 24%, 35% and 44% when planted on November 29, December 14 and December 29, respectively. Decreased grain yield at late planting was associated with lower cobs plant^-1, lower grains cob^-1 and lower 1000 grain weight which might have occurred due to forced ripening at high temperature and also lower dry matter partitioning in reproductive parts during later stage. The late plantings have resulted in high crop growth rates during vegetative period because of high radiation use efficiency (RUE), high percentage radiation interception (RI) but low crop growth rates during grain filling because of low RUE and low RI.

Keywords: Hybrid maize, Sowing time, Yield

Location: Jamalpur

Start Date: 00-00-2006

End Date: 00-00-2007

Program Area: Crop-Soil-Water Management

Commodity: Maize

Objectives:

To identify the suitable variety for AEZ-
To identify the optimum planting time of different hybrid maize in AEZ–9

Methodology:

The experiment was carried out at the Regional Agricultural Research Station, Jamalpur to identify the suitable variety and sowing time of hybrid maize in AEZ-9. Six variety viz. Pacific-11, Pacific-60, Pacific-984, 900 M, NK-40 and BARI Hybrid Maize-3 (BHM-3) were planted in five different dates viz. 30 October, 14 November, 29 November, 14 December and 29 December. The experimental site is medium high land and belongs to the agro-ecological zone (AEZ)-9 (UNDP and FAO, 1988). The texture of the soil is silt loam. The land remained fallow before setting the experiment. The field was opened by cultivator in the 2^nd week of October. Fertilizers at the rate of 240-50-100-45-5-1 kg ha^-1 N-P-K-Zn-S-B, respectively were used in the form of urea, triple super phosphate, muriate of potash, gypsum, zinc sulphate and boric acid. One-third of urea and all other fertilizers were applied as basal during final land preparation. The rest amount of urea was applied in two splits at 25 and 45 DAS after weeding and irrigation but prior to earthing up (BARI, 2004). The land was prepared by three ploughings with cultivator and two final ploughings by power tiller followed by laddering to obtain desirable tilth for maize cultivation. The unit plot size was 6 m x 4 m. At first a furrow was made with a tine and seeds were planted at 3-4 cm depth and the seeds were covered lightly by soil to ensure germination. Plots were thinned to get desired stands at the seedling stage followed by Vafias and Ipsilandis (2005). Intercultural operation was done where and when necessary. Data were recorded plant height, cob height, cob/plant, cob length, cob diameter, row/cob, seed/row, 1000-seed weight, seed yield (t/ha), stover yield (t/ha) and rachis yield (t/ha). Collected data were analysed statistically using computer package programme M-State (Gomez and Gomez, 1984).

Source of Information: Bangladesh J. Agriculturist. 4(1): 15–24, 2011 ISSN 1812-4631

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The study found that the hybrids, BHM-3 produced the highest grain yield at early sowing (October 30) but Pacific-11 and Pacific-60 gave higher grain yield at November 14 sowing date. Therefore, farmers of this region can cultivate BHM-3 if they have scope of planting by last week of October to first week of November while at the middle or later part of November Pacific-11 and Pacific-60 may be plant.

Knowledge Management: Journal