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Physio-morphological Features of Chilli Accessions Under Moisture Stress Conditions

M. A. I. KHAN
Chief Scientific Officer
Horticulture Research Centre, (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur

M. A. HOQUE
Associate Professor
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur- 1706,

A. M. FAROOQUE
Sher-e-Bangla Agricultural University (SAU), Dhaka

U. HABIBA
Lecturer
Deptt. of Botany, Shahid Smriti Govt. College, Muktagacha, Mymensingh

M. A. RAHIM
Professor
Deptt. of Horticulture, Bangladesh Agricultural university (BAU), Mymensingh, Bangladesh

Abstract/ Executive Summary:

An experiment was carried out at the Bangladesh Agricultural University, Mymensingh during October 2005 to March 2007 to study the effect of different soil water levels on the physio-morphological features of ten Chilli (Capsicum annuum L.) accessions viz. C-0277, C-0297, BM-1, C-0100, BM-2, C-0265, C- 0272, C-0275, BM-3, and C-0271. The experiment was set up in pots under glasshouse condition. The water treatments were applied at 4 vegetative growth stages following withholding method (crude method) starting from 25 days after sowing and thereafter at every 7 days interval until final stage. The water treatments applied were W1 = watering once a day; W2 = watering at 4 days interval; W3 = watering at 8 days of interval, and W0 = no watering. Moisture capacity of polybag (analogous to field capacity) was determined by subtracting leached water from the original amount of water applied. In most of the parameters studied, W2 gave the highest value, W1 and W0 gave the lowest, while W3 in between. Only a slight deviation was noticed in case of root volume and root dry weight, where W0 produced the 2nd highest and highest values, respectively. The effects of different water treatments on all the growth parameters studied was significant in case of all accessions and growth stages. The accessions C-0271, C-0277, BM-1, and C-0297 produced higher dry matter.

Keywords: Physio-morphological, Chilli accessions, Stress condition

Location: Bangladesh Agricultural University, Mymensingh

Start Date: 21-10-2005

End Date: 18-03-2007

Program Area: Crop-Soil-Water Management

Commodity: Chilli

Objectives:

To study the physio-morphological features of 10 local accessions of chilli by allowing them to grow in excess and deficit soil moisture conditions.

Methodology:

The present investigation was carried out under glasshouse in Polybags at Bangladesh Agricultural University, Mymensingh during 21 October 2005 to 18 March 2007. Ten accessions of chilli, viz. C-0277= V1, C-C0297= V2 , BM-1= V3, C-0100= V4, BM-2= V5, C-0265=V6, C-0272= V7, C-0275= V8, BM-3= V9, and C-0271= V10, were included for the study. The growing medium was prepared with the ratio of 60:30:10 for fine river sand, soil and rotten cowdung, respectively, and put in 20 × 12 cm size polybag weighing 5kg each. Polybag capacity (analogous to field capacity) of the growing medium in the specific polybag size and weight used in the experiment was determined so as to maintain optimum and uniform moisture levels particularly at the time of seed sowing. To determine polybag capacity, randomly selected polybags were evenly watered until water leaked from the bottom. After eight hours of drainage, sand or compost samples were collected in soil cores and oven dried at 80⁰ C for 72 hours. The moisture contents of the samples were determined and used in determining the polybag capacity of the pre weighed growing media for glasshouse experiment. Different treatments were imposed by withholding water for varying intervals according to the moisture levels desired in the experiment. Fertilizers were applied in each bag after 10 – 15 days of treatment imposition, on a day when all the treatments received water. Each irrigation aimed to return the bag to its capacity level so that the whole of the growing medium in each bag of each treatment received optimum moisture. For treatment application an estimate was made by randomly selecting three bags of each treatment and watering them until leaked from the bottom. After two hours, the leached water was measured and subtracted from the original volume applied and considered it as the optimum bag capacity and this volume was given to all other bags of the same treatment. This method of water treatment application was followed by Hamid (1993). Water treatments were imposed in 4 stages of vegetative growth each having 7 days of span. Upto 31 days of sowing, it was considered as lst stage and thereafter every 7 days for each stage. The stages were denoted as S1= 25-31 days (after seed sowing), S2 = 32-38 days, S3 = 39-45 days and S4 = 46-52 days. Water treatment was started on 14 November 2005 when most of the plants possessed at least 2-4 visible leaves. The watering treatments were W1= watering once a day, W2= watering at 4days interval, W3 =watering at 8 days interval and Wo= no watering (control). Split-split plot design was followed having 3 replications. Six seeds per bag were sown on 21 October 2005 and the germinated plants were thinned to 1 in each bag before imposition of moisture (water) treatments.

Source of Information: Bangladesh J. Agril. Res. 37(2): 263-269, June 2012,ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

On overall consideration, it can be concluded that the accessions C-0271, C- 0277, BM-1 and C-0297 may be utilized as water stress tolerant in chilli.

Knowledge Management: Journal