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Variations of Growth Parameters in Transplanted Aman Rice (cv. BRRI Dhan39) in Response to Plant Spacing and Fertilizer Management

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

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

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

Abstract/ Executive Summary:

The experiments were carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh during June to December 2015 to investigate the effect of spacing and fertilizer management on the growth parameters of transplant Aman rice cv. BRRI dhan39. The experiment comprised of five spacing’s viz. 25 cm × 5 cm, 25 cm × 10 cm, 25 cm × 15 cm, 25 cm × 20 cm, 25 cm × 25 cm, and four fertilizer treatments viz. no manure and no fertilizer (control), recommended dose of chemical fertilizer (80-60-40 kg N, P₂O₅, K₂O ha^-1,respectively + 60 kg ha^-1 gypsum + 10 kg ha^-1 ZnSO₄), 75% recommended dose of inorganic fertilizer + cow dung at 5 t ha^-1_,75% recommended dose of inorganic fertilizer + poultry manure @ 2.5 t ha^-1. The highest and lowest plant height was found in spacing 25 cm × 15 cm, and 25 cm × 5 cm, respectively at all dates of observations. Spacing 25 cm × 15 cm, produced the highest number of tillers hill^-1 at 80 DAT. Leaf area index (LAI) and total dry matter (TDM) hill^-1 were the highest in 25 cm × 15 cm spacing and lowest in 25 cm × 5 cm spacing. The highest plant height, LAI and total TDM hill^-1 were recorded in 75% recommended dose of inorganic fertilizer + cow dung at 5 t ha^-1and the lowest values were observed in control treatment. In case of interaction, the highest number of tillers hill^-1, leaf area index and total dry matter hill^-1were obtained in spacing 25 cm × 15 cm fertilized with 75% recommended dose of inorganic fertilizers + cow dung at 5 t ha^-1.Therefore, 25 cm × 15 cm spacing combined with 75% recommended dose of inorganic fertilizers + cow dung at 5 t ha^-1appeared as the promising practice in transplant Aman rice cv. BRRI dhan39 cultivation in terms of growth parameters.

Keywords: Fertilizer management, Growth, Spacing, Transplanted Aman rice

Location: Agronomy field laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-01-2015

End Date: 00-12-2015

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

To analyze the growth parameters of transplant Aman rice in respect to appropriate spacing and proper fertilizer management.

Methodology:

The experiment was conducted at the Agronomy field laboratory, Bangladesh Agricultural University, Mymensingh, during the period from July to December 2015 to study the effect of spacing of transplanting and fertilizer management on the growth of transplant Aman- rice. The experimental sites belongs to the Sonatola Soil Series of Old Brahmaputra Floodplain (AEZ 9) having non calcareous dark grey floodplain soil. The land was medium high with sandy loam texture having pH 5.9. BRRI dhan39, a high yielding modern rice variety of transplant Aman rice, developed by the Bangladesh Rice Research Institute, has been used as the test crop. The experiment comprised five spacings viz., 25 cm × 5 cm (S₁), 25 cm × 10 cm (S₂), 25 cm × 15 cm (S₃), 25 cm × 20 cm (S₄), 25 cm ×25 cm (S₅) and four fertilizer treatments viz. no manure and no fertilizer (control) (N₀),recommended dose of chemical fertilizer (80-60-40 kg N, P₂O₅,K₂O ha^- ¹, respectively + 60 kg ha^-1 gypsum + 10 kg ha^-1 ZnSO₄) (N₁), 75% recommended dose of inorganic fertilizer + cow dung at 5 t ha^-1 (N₂), 75% recommended dose of inorganic fertilizer + poultry manure @ 2.5 t ha^-1 (N₃). The experiment was laid out in a Randomized Complete Block Design with three replications. There were 60 unit plots in the experiment. The size of unit plot was 4m × 2.5m. The experimental plots were fertilized according to the treatments during final land preparation. Nitrogen was applied accordingly experimental specification in the form of urea at three splits application. Five hills were randomly selected and marked with the bamboo sticks in each unit plot excluding border rows to record the data on plant height and tiller number. Plant height and number of total tillers hill^- ¹were recorded five times at 20, 35, 50, 65 and 80 days after transplanting (DAT). Leaf area index and total dry matter hill^-1 were determined at 60 DAT. For total dry matter determination, five hills were randomly selected in each plot excluding border rows. The plant samples were destructed and packed in labeled brown paper bags and dried in the oven at 80±5°C for 72 hours until constant weight was reached. Recorded data were analyzed statistically using “Analysis of Variance Technique and the differences among treatment means were adjudged by Duncan’s Multiple Range Test (DMRT) (Gomez and Gomez, 1984).

Source of Information: Archives of Agriculture and Environmental Science 2 (1): 1-5 (2017)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the findings of the experiment it can be concluded that tallest plant, highest number of total tiller hill^-1, highest leaf area index and total dry matter production hill^- ¹ were obtained in 25 cm × 15 cm spacing. The highest number of tillers hill^-1, leaf area index and total dry matter hill^-1 were observed in 75% recommended dose of inorganic fertilizer + cow dung at 5 t ha^-1. In case of interaction, growth parameters gave the highest values in spacing 25 cm × 15 cm fertilized with 75% recommended dose of inorganic fertilizers + cow dung at 5 t ha^-1. Therefore, application of 75% recommended dose of inorganic fertilizer + cow dung at 5 t ha^-1in plant spacing 25 cm × 15 cm appeared as the promising practice in respect of growth of transplant Aman rice (cv. BRRI dhan39).

Knowledge Management: Journal