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Growth and Dry Matter Partitioning in Selected Soybean (glycine Max L.) Genotypes

M. S. A. Khan
Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Bangladesh,

M. A. Karim
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh,

M. M. Haque
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh,

A. J. M. S. Karim
Department of Soil Science, BSMRAU, Bangladesh.

M. A. K. Mian
Department of Genetics and Plant Breeding, BSMRAU, Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted at the experimental site of Agronomy Department, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during the period from January to June 2011 to evaluate twenty selected soybean genotypes in respect of growth, dry matter production and yield. Genotypic variations in plant height, leaf area index, dry matter and its distribution, crop growth rate and seed yield were observed. The plant height ranged from 40.33 to 63.17 cm, leaf area index varied from 3.01 to 8.13 at 75 days after emergence, total dry matter ranged from 12.25 to 24.71 g per plant at 90 days after emergence (DAE). The seed yield ranged from 1745 to 3640 kg per hectare. The genotypes BGM 02093, BD 2329, BD 2340, BD 2336, Galarsum, BD 2331 and G00015 yielded 3825, 3447, 3573, 3737, 3115, 3542 and 3762 kg per hectare, respectively and gave higher than others contributed by higher crop growth rate with maximum number of filled pods. Seed yield of soybean was positively related to total dry matter at 45 DAE (Y = 632.19 + 659.31X, R²= 0.46) and 60 DAE (Y= 95.335 + 405.53X, R²= 0.48). The filled pods per plant had good relationship with seed yield (Y = 1397 + 41.85X, R²= 0.41) than other components.

Keywords: Growth, Dry matter, Soybean, Seed yield

Location: Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur, Bangladesh

Start Date: 00-01-2011

End Date: 00-06-2011

Program Area: Variety and Species

Commodity: Soybean

Objectives:

To observe the genotypic performance in respect of growth, dry matter partitioning and seed yield.

Methodology:

The experiment was conducted at the research field of the department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur, Bangladesh during the period from January to June, 2011. Twenty soybean genotypes viz. BARI Soybean-5 (check), BARI Soybean-6 (check), G00342, BD 2338, BD 2355, BD 2329, BD 2340, BD 2342, AGS 95, G00056, AGS 129, BD 2336, BGH 02026, BGM 02093, Galarsum, BD 2350, G00084, BD 2331, G00003 and G00015 were tested. These genotypes were selected based on their better performance in agronomic traits. The experiment was laid out in a RCB design with three replications. The unit plot size was 2.4 m x 2.5 m. The soil was silty clay in texture with pH of 6.5. The seeds were sown on 12 January 2011 with 30 cm apart lines maintaining 5 cm plant to plant distances. Fertilizers were applied at the rate of 28-30-60-18 kg/ha of NPKS in the form of urea, TSP, MoP and Gypsum, respectively (FRG, 2005). Half of urea and full doses of other fertilizers were applied at the time of final land preparation. The remaining half of urea was top dressed at flowering stage followed by irrigation. A light irrigation was done on the soil for uniform emergence. Additional three irrigation were given to the crop at trifoliate vegetative (V₃), beginning bloom (R₁) and full pod stage (R₄). Admire 200SL @ 1 ml/liter of water was sprayed at 10 and 25 DAE to control Jassids and white flies. Belt 4g/liter of water and Ripcord 10 EC @ 1 ml/liter of water was sprayed at 45 and 60 DAE, respectively to control leaf roller and pod borer. Five plants were collected from each plot at 15 days interval for different growth parameters like leaf area, total dry matter (TDM) and crop growth rate (CGR). Plants were cut at base and separated into stem, petiole, leaves and reproductive part. Then the leaf area was measured by an automatic leaf area meter (LI 3100 C, LI-COR, USA). The plant samples were oven dried at 70ºC to a constant weight to measure dry matter of different plant parts. The crop was harvested from 3 May to 14 May, 2011. Yield contributing characters were recorded from linearly collected 5 plants and yield were recorded from an area of one square meter. Data were analyzed and means were compared using Least Significant Difference (LSD).

Source of Information: Bangladesh J. Agril. Res. 40(3): 333-345, September 2015, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Plant height, leaf area index, dry matter distribution in different parts, crop growth rate and seed yield showed variation among the genotypes. The genotypes BGM 02093, BD 2329, BD 2340, BD 2336, Galarsum, BD 2331 and G00015 performed better in respect of higher accumulation of total dry matter and seed yield. The selected genotypes should further be incorporated in breeding trials to develop high yielding soybean varieties.

Knowledge Management: Journal