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Growth and Productivity of Short Duration Aman Rice Genotype

M. S. Hasan
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706

A. R. Khan*
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706

M.A. Islam
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706

M. M. Haque
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706

Abstract/ Executive Summary:

A field experiment was conducted at the research field of Agronomy Department of Bangabandhu Sheikh Mujibur Rahman Agricultural University during Aman season of 2014. Twenty four day old seedlings were transplanted in the main filed in a randomized complete block design with three replications. The advanced rice line BU- 9958-40-5-1 was compared with BRRI dhan56, BRRI dhan57, Binadhan-7 and BU dhan1. Results showed that rice var. BRRI dhan57 matured earlier [81 days after transplanting (DAT)] while the advanced line took the maximum days (90 DAT) to mature in the field. Although the tallest plant (113.80 cm) was observed in BRRI dhan56 but tiller number (12.22), leaf area index (4.67) and dry matter production (398.69 g m^-2) were the highest in advanced line BU-9958-40-5-1. The advanced line produced the highest grain yield (5.98 t ha^-1) coupled with the highest biological yield (11.55 t ha^-1) but failed to show the highest harvest index. Thus it seemed that this line was not much efficient in converting total dry matter into grain which is the ultimate target of crop production. Therefore, this result can help physiologists and breeders to determine physiological and morphological features of the advanced line BU-9958-40- 5-1 that contribute the most to increasing dry matter partition into grain.

Keywords: Variety, Advanced line, Growth, Yield, Harvest index

Location: Agronomy research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur

Start Date: 00-07-2014

End Date: 00-12-2014

Program Area: Variety and Species

Commodity: Rice

Objectives:

The present study was aimed to evaluate yield potential of advanced line (BU-9958-40-5-1) and compare to growth and productivity of different short duration aman rice.

Methodology:

The experiment was conducted at the Agronomy research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during aman season of 2014. It is located in Madhupur Tract under Agro Ecological Zone- 28 at geographic coordinate 24 05' North latitude and 90 16' East longitude with an elevation of 8.4 m above the mean sea level. The soil of the experimental site is silty clay in surface and silty clay loam in sub-surface region. The site is situated in the sub-tropical region characterized by heavy rainfall during monsoon at the months from May to September and scanty rainfall in the rest of the months of the year. The experimental variables consist of four short duration aman rice varieties viz. BRRI dhan56, BRRI dhan57, Binadhan-7, BUdhan1 and one advanced line BU-9958-40-5-1. The experiment was laid out in randomized complete block design with three replications. The unit plot size was 5 m × 4 m and spacing was 20 cm × 20 cm. Rice seedlings of 24 days old were transplanted on August 17, 2014 with two seedlings per hill on well puddle soil. Gap filling was done within two weeks after transplanting. Except nitrogen, the crop was fertilized with a blanket dose of fertilizers 60-50-40-20-4 @ N-P-K-S-Zn kg ha^-1 respectively at the time of final land preparation. Nitrogen was applied in the form of urea in two installments as top dressing. First top dressing was done at 15 days after transplanting (DAT) and second at 30 DAT. Two hand weedings were done at 15 and 30 DAT to prevent weed infestation. Furadan 5 G @ 10 kg ha^-1 was applied to control the infestation of stem borer at active filleting stage. After transplanting, sufficient amount of water was maintained in each plot by supplementary irrigation throughout the growing period. Standing water was maintained in the field at 2 to 4 cm until hard dough stage was reached.

Data on different growth parameters, yield components and yield were recorded. Plant samples were collected at 10 days interval starting from 15 DAT till maturity. At each sampling, three hills were uprooted sequentially from a single row. To avoid border effect, plants were sampled from second and third rows at each sampling time. The above ground plant parts were segmented into different components as leaf, stem, leaf sheath and panicle. Leaf areas of sampling were measured by an automatic leaf area meter (AAM-8, Hayashi Dehnko, Japan) immediately after sampling. The partitioned plant parts were then dried in an oven at 70^oC for 72 hours and weighed. Grains and straw obtained from each unit plot were sun dried and weighed. The grain yield and straw yield was converted tot ha^-1. Data on different parameters were statistically analyzed using procedure described by Gomez and Gomez (1984) and means were compared using least significant difference by LSD test.

Source of Information: Bangladesh Agron. J. 2017, 20(2): 27-36

Article Link (Online Journal):

Funding Source:

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Achievement/Findings:

Results of the present study indicated that there was variability in performance of short duration Aman rice genotypes. Among the rice genotypes, BRRI dhan57 was earlier (81 DAT) while the advanced line BU-9958-40-5-1 took the maximum days (90 DAT) to mature. However, the advanced line produced the highest grain yield (5.98 t ha^-1) coupled with the highest biological yield (11.55 t ha^-1) but failed to show the highest harvest index. Thus it seemed that this line was not much efficient in converting total dry matter into grain which is the ultimate target of crop production. Therefore, this result can help physiologists and breeders to determine physiological and morphological features of the advanced line BU-9958-40-5-1 that contribute most to increasing dry matter partition into grain.

Knowledge Management: Journal