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Morpho-physiological Attributes of Transplant Aman Rice as Influenced by Variety, Age of Tiller Seedlings and Nitrogen Management

B. Kirttania
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A.R. Sarkar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

S.K. Paul
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. S. Islam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from July to December 2012 to observe the effect of variety, age of tiller seedling and nitrogen management on the morpho-physiological attributes of transplant Aman rice. Two variety viz. BRRI dhan49 and BRRI dhan51, two ages of tiller seedlings viz. 25 and 35-day old tiller seedlings, and five levels nitrogen management viz. control (no urea application), application of prilled urea @ 215 kg ha^-1 in two splits (1/2 at 15 DAT+1/2 at 30 DAT), application of prilled urea @ 215 kg ha^-1 in three splits (1/3 at 15 DAT+1/3 at 30 DAT+1/3 at 45 DAT), application of USG 1.8 g and application of USG 2.7 g were included in the experiment using randomized complete block design with three replications. Morpho-physiological attributes of transplant Aman rice were influenced by variety, age of tiller seedling, nitrogen management and their interactions. Higher plant height (61.30cm, 30 DAT) and (76.87cm, 45 DAT), number of tillers hill^-1(10.02, 30 DAT) and (10.81, 45 DAT), leaf area index (LAI) (0.36, 15 DAT), (0.69, 30 DAT) and (1.85, 45 DAT), total dry matter (TDM) (1.97g, 30 DAT) and (6.20g, 45 DAT) were obtained in BRRI dhan49 compared to BRRI dhan51. In case of age of tiller seedlings older seedlings (35-day old) produced higher plant height (60.37cm, 30 DAT), tillers hill^-1 (10.38, 30 DAT), while younger seedling (25-day old) produced higher plant height (72.56 cm, 45 DAT) and tillers hill^-1 (10.57, 45 DAT). Relatively older seedlings (35-day old) produced higher LAI and TDM at 15, 30 and 45 DAT compared to younger seedlings. The highest plant height (43.74 cm, 30 DAT) and (60.53 cm, 45 DAT) tillers hill^-1 were found when prilled urea was applied in three splits. The highest LAI (1.93, 45 DAT) was found when USG 1.8 g was applied per four hill in every alternate rows and the lowest LAI (1.52, 45 DAT) when USG 1.8 g was applied. Total dry matter production hill-1 (11.19 g, 45 DAT) was found when prilled urea was applied in two splits and the lowest total dry matter production hill-1 (9.24 g) was found when USG 2.7g was applied. The highest total dry matter production hill-1 (9.94 g, 30 DAT) was found when 35-day old tiller seedlings of BRRI dhan49 were fertilized with prilled urea in three splits.

Keywords: Morpho-physiology, Tiller seedling, Nitrogen management

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2012

End Date: 00-12-2012

Program Area: Variety and Species

Commodity: Rice

Objectives:

1. To observe the influence of variety, age of tiller seedlings and nitrogen management on the morpho-physiological attributes of transplant Aman rice.

Methodology:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to study the effect of variety, age of tiller seedling and nitrogen management on the growth and yield of transplant Aman rice. The experimental area belongs to the non-calcareous dark grey soil under Agro-ecological Zone of the Old Brahmaputra Floodplain (AEZ-9). The land was silty loam in texture having a soil pH 6.42, moderate in organic matter content. The experiment consisted of three sets of treatments viz. variety (2) BRRI dhan49 and BRRI dhan51, age of tiller seedlings (2) 25 and 35-day old, nitrogen management (5) i. Control, ii. Application of prilled urea @ 215 kg ha^-1 (1/2 at 15 DAT+1/2 at 30 DAT), iii. Application of prilled urea @ 215 kg ha^-1 (1/3 at 15DAT +1/3 at 30DAT +1/3 at 45DAT), iv Application of USG 1.8g per four hill in every alternate row, v. Application of USG 2.7g per four hill in every alternate row. The experiment was laid out in a randomized complete block design with three replications. Plot size was 4.0 m x 2.5 m (10 m²) and total number of plots was 60. Tillers were separated at 25 and 35 days after transplanting from previously transplanted rice field and then retransplanted in the main field according to experimental plan. The experimental plots were fertilized with triple super phosphate, muriate of potash, gypsum and zinc sulphate @ 100, 70, 60 and 10 kg ha^-1, respectively. The entire amount of triple super phosphate, muriate of potash, gypsum and zinc sulphate was applied at final land preparation. Prilled urea and urea super granules (USG) was applied as per experimental treatments. Five hills were randomly selected hills in each unit plot excluding boarder rows to record the data on plant height and tiller numbers. Plant height and number of tillers hill^-1 were recorded at 15 days intervals beginning at 15 DAT. For leaf area index, leaves of two hills were separated and their areas were measured by an automatic leaf area meter. Leaf area index (LAI) was calculated by the ratio of leaf area to its ground area, i.e., LAI= LA/P, where L = Leaf area and P = Ground area. To determine total dry matter (TDM) destructive plant samples were packed in labeled brown paper bags and dried in the oven at 80 ± 5°C for 72 hours until constant weight was reached. The samples were weighed carefully after oven drying to measure the dry weight of plant. The recorded data were statistically analyzed using the “Analysis of Variance" technique and the differences among treatment means were adjudged by Duncan's New Multiple Range Test.

Source of Information: J. Agrofor. Environ. 7 (2): 149-154, 2013; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Morpho-physiological attributes of transplant Aman rice were influenced by variety, age of tiller seedling, nitrogen management and their interactions. Higher plant height (61.30cm, 30 DAT) and (76.87cm, 45 DAT), number of tillers hill^-1(10.02, 30 DAT) and (10.81, 45 DAT), leaf area index (LAI) (0.36, 15 DAT), (0.69, 30 DAT) and (1.85, 45 DAT), total dry matter (TDM) (1.97g, 30 DAT) and (6.20g, 45 DAT) were obtained in BRRI dhan49 compared to BRRI dhan51. In case of age of tiller seedlings older seedlings (35-day old) produced higher plant height (60.37cm, 30 DAT), tillers hill^-1 (10.38, 30 DAT), while younger seedling (25-day old) produced higher plant height (72.56 cm, 45 DAT) and tillers hill^-1 (10.57, 45 DAT). Relatively older seedlings (35-day old) produced higher LAI and TDM at 15, 30 and 45 DAT compared to younger seedlings. The highest plant height (43.74 cm, 30 DAT) and (60.53 cm, 45 DAT) tillers hill^-1 were found when prilled urea was applied in three splits. The highest LAI (1.93, 45 DAT) was found when USG 1.8 g was applied per four hill in every alternate rows and the lowest LAI (1.52, 45 DAT) when USG 1.8 g was applied. Total dry matter production hill^-1 (11.19 g, 45 DAT) was found when prilled urea was applied in two splits and the lowest total dry matter production hill^-1 (9.24 g) was found when USG 2.7g was applied. The highest total dry matter production hill-1 (9.94 g, 30 DAT) was found when 35-day old tiller seedlings of BRRI dhan49 were fertilized with prilled urea in three splits.

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