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Effect of N and P on the Yield, Yield Attributes and Protein Content of Aromatic Rice (cv. BRRI Dhan34)

M.A. Hoque
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Akter
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A.K. Chowdhury
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A.H. Chowdhury
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at the Central Farm of Bangladesh Agricultural University, Mymensingh during the period from July to December, 2009 to observe the effect of N and P fertilization on the yield attributes and yield of aromatic rice cv. BRRI dhan34. The experiment comprised of four levels of N and four levels of P viz. 0, 55, 110, and 165 kg N ha^-1 (N₀, N₁, N₂ and N₃) and 0, 25, 50 and 75 kg P ha^-1 (P₀, P₁, P₂ and P₃), respectively. Yield and yield attributes were significantly influenced by the individual application of N and P except plant height and panicle length. The highest values of most the parameters were recorded from the plot fertilized with N₃ and P₂ treatment. Interaction effect of N and P fertilizer showed significant variation on filled grains, total grains, 1000-grain weight, grain and straw yield. The highest values of most of the parameters were obtained from the treatment combination of N₃P₂ except plant height, panicle length, total tillers, straw nitrogen content and straw yield. The overall results suggest that aromatic rice can be grown non calcareous soil fertilized with 110 kg N in combination with 50 kg Pha^-1 to get higher yield for its large scale production in Bangladesh.

Keywords: Nitrogen, Phosphorus, Aromatic rice, Yield, Protein

Location: Central Farm of Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2009

End Date: 00-12-2009

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To examine the effect of N and P on the yield attributes, yield and protein content of aromatic rice.

Methodology:

A field experiment was conducted during Kharif season to examine the effect of N and P on yield attributes and yield of aromatic rice in the central farm of Bangladesh Agricultural University, Mymensingh, during the period from July to December, 2009. The soil was silt loam in texture having pH 6.49 with 1.30% organic matter, 0.11% total N, 12.1 mg kg^-1 available P, 0.06 cmol kg^-1 exchangeable K. The experiment consisted of N and P0, 55, 110, and 165 kg N ha^-1 (N₀, N₁, N₂ and N₃) and 0, 25, 50 and 75 kg P ha^-1, respectively. Soil samples were randomly collected at 0-15 cm depth during the time of land preparation from twenty five spots of the experimental land and composited. The crop under study was aromatic rice (cv.BRRI dhan34). This rice genotype was characterized by its scented properties like aroma, size and taste. Nitrogen and P fertilizers were applied as per design and treatments from urea and TSP and all other fertilizers like triple super phosphate, gypsum, borax and muriate of potash were applied according to the fertilizer recommendation guide. All chemical fertilizers and one-third of urea were applied during final land preparation and rest of the urea were applied in two installments. The experiment was laid out in RCBD with three replications. Individual plot size (4 m x 2.5 m) 10 m², space between unit plots is 0.5 m and space between replication is 0.5 m. Intercultural operations like weeding, thinning, gap filling, irrigation, pest control were done as and when necessary to ensure normal growth of crop. After collecting plant samples, the crop was harvested and sun dried for 3-4 days and grains were separated from the plants by beating the bundles with bamboo sticks. The seeds were dried in the sun for 2-3 days to 9% moisture level and cleaned. Soil and plant chemical properties were analyzed following the standard methods. Analysis of variance was done with the help of computer package M-STAT and the mean differences of the treatments were adjudged by LSD test. Total nitrogen was determined by Kjeldahl method. Protein was calculated from percent total nitrogen multiplied by 5.85.

Source of Information: J. Agrofor. Environ. 4 (2): 173-176, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Yield and yield attributes were significantly influenced by the individual application of N and P except plant height and panicle length. The highest values of most the parameters were recorded from the plot fertilized with N₃ and P₂ treatment. Interaction effect of N and P fertilizer showed significant variation on filled grains, total grains, 1000-grain weight, grain and straw yield. The highest values of most of the parameters were obtained from the treatment combination of N₃P₂except plant height, panicle length, total tillers, straw nitrogen content and straw yield. The overall results suggest that aromatic rice can be grown non calcareous soil fertilized with 110 kg N in combination with 50 kg P ha^-1 to get higher yield for its large scale production in Bangladesh.

Knowledge Management: Journal