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Effect of Ga3 and Ccc on Chlorophyll, Yield and Yield Components of Two Cultivars of Maize

M. Ashrafuzzaman
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

S. C. Sarker
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

Effects of GA ₃ and CCC on the two maize cultivars namely Quality Protein Maize (QPM) c v. Nutricta and Barnali were investigated under the agro-climatic conditions of Mymensingh, Bangladesh during the period from 5 January to 11 May 1994. GA₃ at 25, 50 or 100 ppm and CCC at 500 or 1000 ppm were sprayed over the foliage of the maize plants on 40 days after sowing (DAS) while the control plants were sprayed with distilled water. GA ₃significantly increased plant height, ear length, ear diameter, kernel row /ear, kernel number/row, 1000-kernel weight and grain yield (t/ha) both the cultivars. GA₃ at 50 ppm concentration was found more effective than other concentrations. Except chlorophyll contents and 1000-kernel weight, CCC had retarding effect on the parameters studied. Higher yields (5.30 and 5.13 t /ha) were harvested from plants sprayed with 50 ppm and 100 ppm of GA ₃ respectively. QPM cv. Nutricta was found more responsive to GA₃and CCC than the local cultivar Barnali.

Keywords: Chlorocholine Chloride (CCC). Gibberellic actd (GA3), Growth parameters, Maize

Location: Mymensingh

Start Date: 05-01-1994

End Date: 11-05-1994

Program Area: Variety and Species

Commodity: Maize

Objectives:

An experiment was designed to study the adaptation efficiency of a QPM cv. Nutricta and a check cultivar Barnali in the existing agro-climatic condition of Mymensingh and to evaluate the effectiveness of GA₃and CCC on the growth and yield performance of them.

Methodology:

A field experiment was conducted at the experimental farm of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh during 5 January to 11 May 1994 to study the effect of GA ₃ and CCC on OPM maize cv. Nutricta developed by CYMMIT with a check cultivar Barnali. The soil of the farm was sandy loam in texture. The prepared land was divided into three blocks each representing a replication and each block was then divided into 14 plots each of 5 x 4 m size keeping 1m space between plots. Seeds of two cultivars (QPM & Barnali) were soaked in water for 24 hrs and sown on 5 January 1994 by dibbling method keeping line to line distance of 75 cm and seed to seed distance of 50 cm in a line. Calculated amount of chemicals were dissolved in distilled water to prepare 100 ppm of GA ₃ and 1000 ppm of CCC stock solutions. The stock solutions after proper dilutions were sprayed over the foliage of the plants as per treatments until all the leaves were fully wet on 40 days after sowing (DAS). At final harvest, from randomly selected 5 plants in each plot, data were recorded on plant height, leaves per plant, ear length, ear diameter, kernel row per ear, kernels per row and 1000-kernel weight. The grain yield was calculated on the whole plot harvest basis. The collected data were statistically analyzed.

Source of Information: Bangladesh J. Agril. Sci. 22(2): 333-338, July, 1995

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In conclusion it is obvious that GA₃especially with 50 ppm concentration was most effective to maximize grain yield as it enriched source strength for more assimilates as well as stimulated sink capacity to store more assimilate. In plant, sink and source have a balanced relation. Here sink strength (ear size and kernel number per ear) was larger in GA ₃ treated plants particularly at 50 ppm and smaller for CCC application. Number of kernels per ear showed strong relation to grain yield and ear length and diameter were positively correlated for grain yield. Thus GA ₃ treated maize plants maximize the yield while CCC reduced the same. At the same time the OPM cv. Nutricta suited well in agro-climatic conditions of Mymensingh performing equally well as that of the local cultivar, Barnali.

Knowledge Management: Journal