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Fodder Yield and Grain Yield of Maize as Influenced by Source-sink Manipulation at Different Time of Leaf Clipping After Silking

M. A. Aziz
PSO
Agronomy Division, Gazipur

M. K. Islam

Abstract/ Executive Summary:

The experiment was carried out at ARS, Burirhat, Rangpur and RARS, Hathazari during rabi season of 2008-09 to observe the effect of leaf clipping of maize at different days on grain and fodder yield of maize (var. BARI Hybrid maize-5). At Burirhat, leaf clipping at 15 t0 35 after silking did not influenced significantly on grain yield and yield component of maize but influenced significantly on the number and weight (fresh and dry) of clipped leaves of single plant and fresh yield of clipped leaves. Grain yield ranged from 9.67-9.81 t ha^-1 in leaf clipping treatments while 9.97 in control (no clipping). At Hathazari, Keeping 4 leaf above the cob then all clipped after 15 days of silking (T5) gave 8.70 t/ha grain yield and keeping 4 leaf above the cob then all clipped after 21 days of silking (T6) gave 8.50 t/ha but the yield reduction were 3.33 and 5.56% respectively. Leaf clipping of hybrid maize at different dates had no significant influence on grain yield of maize at Burirhat and 3 to 22% yield reduction occurred at Hathazari, rather a substantial amount of green leaf was harvested as fodder for animal feeding.

Keywords: Fodder and grain yield, Maize, Souce-Sink manipulation, Leaf clipping

Location: ARS, Burirhat and RARS, Hathazari

Start Date: 00-00-2008

End Date: 00-00-2009

Program Area: Crop-Soil-Water Management

Commodity: Fodder

Objectives:

To find out the optimum time of leaf clipping that may reduce the grain yield loss.

Methodology:

The experiment was conducted at ARS, Burirhat and RARS, Hathazari during the rabi season 2008-09 in a RCB design with 3 replications. The unit plot size was 4.5m x 5m. Nine source-sink manipulation treatments were included in the study. These were: T₁, 50 % leaf clipping below the cob after 15 days of silking; T₂, 50 % leaf clipping below the cob after 21 days of silking; T₃, 50 % leaf clipping below the cob after 28 days of silking; T_4, 50 % leaf clipping below the cob after 35 days of silking; T₅, Keeping 4 leaves above the cob then all clipped after 15 days of silking; T₆, Keeping 4 leaves above the cob then all clipped after 21 days of silking; T₇, Keeping 4 leaves above the cob then all clipped after 28 days of silking; T₈, Keeping 4 leaves above the cob then all clipped after 35 days of silking and T₉, Control (No clipping). BARI Hybrid maize-5 was sown on 21 November, 2008 at Burirhat and November at Hathazari with a spacing of 75cm × 25cm. The crop was fertilized at the rate of 260-55-4030-4-1 kg/ha NPKSZnB in the form of urea, triple super phosphate, muriate of potash, gypsum, zinc sulphate and boric acid respectively. One-third N and full amount of PKSZnB were applied as basal. Rest N was top dressed in two equal splits at 30 and 60 days after sowing of maize followed by irrigations. Third irrigation was done at 90 DAS of maize. Yields were taken from whole plot. Yield components were taken from ten randomly selected plants from each plot. Data on yield and yield components were analyzed statistically and the means were adjudged using LSD

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:

Leaf clipping of hybrid maize at different dates had no significant influence on grain yield of maize at Burirhat and 3 to 22% yield reduction occurred at Hathazari, rather a substantial amount of green leaf was harvested as fodder for animal feeding.

Knowledge Management: Report/Proceedings