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Root Growth, Nutrient Uptake and Yield of Chickpea Under Drought Condition

A.K.M.M.Rahman
SO
Agronomy Division, Gazipur

M.A.Aziz
PSO
Agronomy Division, Gazipur

Abstract/ Executive Summary:

An experiment was carried out under semi control condition in vinyl house of Agronomy Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during rabi season of 2009-10 and 2010-2011 to evaluate the genotypic variations in root characteristics, nutrient uptake pattern and yield of chickpea under drought condition. Eight genotypes viz, BARI Chola-3, BARI Chola-5, BARI Chola-6, BARI Chola-7, BINA Chola-3, BINA Chola-4, ICCL-87322 and BCX-007-10 were tested under three drought stress (no drought stress, drought stress at vegetative stage and drought stress at reproductive stage). BARI Chola-5 and BINA Chola-4 produced maximum root length and volume. Drought stress reduced nutrient uptake efficiency of all the genotypes and the reduction was higher in reproductive stage than in vegetative stage. Nutrient (N,P,K) uptake efficiency, relative total dry matter and yield per plant was higher in BINA Chola-4 and BARI Chola-5 under both drought stress condition. Drought stress during vegetative and/or reproductive stage was the most limiting factors for the chickpea growth and yield. Two years results revealed that BINA Chola-4 and BARI Chola-5 performed better under drought stress condition.

Keywords: Root growth, Nutrient uptake, Yield, Chickpea, Drought condition

Location: Joydebpur, Gazipur

Start Date: 00-00-2009

End Date: 00-00-2011

Program Area: Variety and Species

Commodity: Chickpea

Objectives:

To find out whether root system development relates with nutrient uptake and yield of chickpea under drought condition.

Methodology:

The experiment was carried out in plastic pots under vinyl house at the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during rabi seasons of 2009-10 and 2010-2011. Eight chickpea genotypes namely BARI Chola-3, BARI Chola-5, BARI Chola-6, BARI Chola-7, BINA Chola-3, BINA Chola-4, ICCL-87322 and BCX-0007-10 were evaluated with three drought stress condition viz. control (No drought stress), drought stress at vegetative stage (VS) and drought stress at reproductive stage (RS).The experiment was carried out in completely randomized design with four replications. Drought stress was imposed for 30 days by withdrawing of irrigation water and plants were re-irrigated after 30 days. Plastic pots (76 cm on top dia., 74 cm on bottom dia. and 30cm on height) were used in the study. Pots were filled with soil and cowdung in 4: 1 volume ratio and final weight of pot was 13 kg. Fertilizers @ 5-5-2.5-1.5 g/pot NPKS in the form of Urea, TSP, MoP and Gypsum were applied in the soil of pot and incorporated properly in upper 5 cm soil. Seeds were dibbled in soil on 24 November 2009 and 22 November, 2010 at a depth of 1cm. After germination (3-4 days after sowing) three seedlings were left in each pot by removing rest of the seedlings along with their roots. The pots were moved and rearranged weekly to give a random distribution of growth conditions in the vinyl house during the experimental period. For root sampling, plastic pots were soaked in water, soil was washed with water and the roots were recovered by passing the soil water suspension through a 2mm wire mesh sieve. Root length was measured by manual scaling. Root volume was measured in measuring cylinder at different growth stages. For nutrient uptake dry weight of root and shoot were recorded after over drying for 72 hours (to constant weight) at 80⁰C. The chemical analysis was done in Soil Science laboratory, BARI, Gazipur. N uptake was measured by micro Kjeldahl method. P and K uptake were measured by Hunter method. The yield component data were collected from ten randomly selected plants from each treatment at harvest. Data were analyzed following MSTAT program and means were compared using LSD test.

Source of Information: Annual Report, Agronomy Division 2010-2011

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget: 30,000/-

Total Budget (Tk.) : 30,000/-

Achievement/Findings:

Water stress during vegetative and/or reproductive growth stages were observed as the most limiting factors for the chickpea growth and production. Decreasing water availability under drought generally results in reduced total nutrient uptake. BINA Chola-4 and BARI Chola-5 performed better under drought stress conditions than other genotypes. Two years results revealed that Binachola-4 and BARI Chola-5 would be suitable for cultivation in the drought prone areas of Bangladesh.

Knowledge Management: Report/Proceedings