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Effect of Foliar Application of Miyobi Growth Regulators on Morpho- Physiological Attributes and Yield in Chili

M. I. K. Rana
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

M. M. A. Mondal
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh

A. K. M. A. Prodhan
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

M. G. Azam
Department of Horticulture, Potuakhali Science and Technology University, Potuakhali

Abstract/ Executive Summary:

Miyobi solution sprayed on chili plants at 30 days after transplanting. Application of Miyobi increased plant height, branch and leaf number, root length, root number, root weight, stem weight, total dry matter, chlorophyll content and photosynthesis in leaves, fruits plant^-1 and fruit yield over control. Reverse trend was also observed in fruit size. Most of the morphological, biochemical, yield attributes were increased with increasing Miyobi concentration up to 0.8 mgL^-1 followed by a decline. These results indicate that application of Miyobi @ 1.1 mgL^-1 may be toxic for plant growth and development. Control, where only water was sprayed, showed the lowest of the above parameters. The higher fruit yield was recorded in 0.5 and 0.8 mgL-1 with being the highest in 0.5 mgL^-1 (369.8 g plant^-1) due to increased number of fruits plant^-1. The lowest fruit yield was recorded in control (260.3 g plant^-1) due to inferiority in yield attributes. However, application of Miyobi at 0.8 mgL^-1 was more costly than 0.5 mgL^-1. Therefore, Miyobi with 0.5 mgL^-1 may be applied for increased fruit yield of chili for further recommendation few more field trials will require.

Keywords: Chilli, Miyobi growth regulator, Fruit yield

Location: Bangladesh Institute of Nuclear Agriculture, Mymensingh

Start Date: 00-02-2011

End Date: 00-06-2011

Program Area: Crop-Soil-Water Management

Commodity: Chilli

Objectives:

To study the effect of Miyobi on growth, morphological features, yield attributes and yield in chili under Bangladesh conditions.

Methodology:

A pot experiment was carried out at the pot-yard of Bangladesh Institute of Nuclear Agriculture, Mymensingh (24075? N and 90050? E), Bangladesh, during February to June 2011. The soil of the experiment was sandy loam having a total nitrogen 0.06%, organic matter 1.15%, available phosphorus 18.5 ppm, exchangeable potassium 0.28 meq%, sulphur 18 ppm and pH 6.8. The experiment comprised of five concentrations of Miyobi viz., 0, 0.2, 0.5, 0.8 and 1.1 mgL^-1 which were applied at 30 days after transplanting (DAT) i.e. just before flowering start phase. The spray was done by a hand sprayer at afternoon. The local landrace chilli variety, Narikalkhola was used in the present experiment. The soil was thoroughly mixed with the given amounts of urea, triple superphosphate, muriate of potash, gypsum and cowdung at the rate of 3.70, 2.15, 1.30, 0.80 and 150 g pot^-1 corresponding to 300, 160, 140, 40 and 10000 kg ha^-1, respectively. Total amount of TSP, MP, gypsum and cowdung were applied as basal dose during soil preparation. One forth of urea was applied as basal dose and rest threeforth urea was top dress at 21, 45 and 75 DAT. The pots of the experiment were filled with 12 kg of soils. The experiment was laid out in a Completely Randomized Design (CRD) with 6 replications. A single seedling (Thirty-day old seedlings) was sown in each pot on 01 February 2011. The 5-6th replications was used for dry matter production study. Intercultural operations like irrigation, weeding, mulching, pruning, staking, and pest control were followed as and when necessary for normal plant growth and development. Total dry mass (TDM) plant^-1, was recorded at 120 DAT. Plant sample was oven dried at 80 ⁰C ± 2 for 48 hours. The total dry matter plant-1 was estimated by summing dry matter of leaves, stem, root and fruits dry weight per plant. Leaf chlorophyll was measured using the method of Yoshida et al. (1976) at 70 DAT. Photosynthesis was measured at flowering stage (60 DAS) by automatic photosynthesis meter (LICOR 6400 FX, USA). Morphological, reproductive and yield attributes were recorded during chili fruit harvest. Harvesting was done at different dates depending on fruit ripening. The collected data were analyzed statistically using the computer package programme, MSTAT-C and the mean differences were adjudged by Duncan’s Multiple Range Test (DMRT).

Source of Information: J. Environ. Sci. & Natural Resources, 4(2): 111-114, 2011 ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In conclusion, it can be said that foliar application of Miyobi at vegetative stage enhance plant growth and development which resulted increased fruit yield in chili. Among the concentrations, 0.5 and 0.8 mgL^-1 had superiority for plant growth, yield component and yield over 0.2 and 1.1 mgL^-1. However, application of Miyobi at 0.8 mgL^-1 was more costly than 0.5 mgL^-1. Therefore, application of Miyobi @ 0.5 mgL^-1 may be recommended for chili cultivation although further field trials is required for confermation.

Knowledge Management: Journal