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Influence of Different Fertilizer Rates on the Growth and Yield of Transplanted Aman Rice Genotypes

A. Ahmed
BRAC Agricultural Research and Development centre, Gazipur, Bangladesh

M. A. Kabir
Agriculture and Food Security Programme, BRAC, Dhaka, Bangladesh

M. M. Rashid
BRAC Agricultural Research and Development centre, Gazipur, Bangladesh

M. S. Islam
Agriculture and Food Security Programme, BRAC, Dhaka, Bangladesh

P. S. Saha
BRAC Agricultural Research and Development centre, Gazipur, Bangladesh

Abstract/ Executive Summary:

The field experiment was conducted at the BRAC Agricultural Research and Development Centre, Gazipur from June to October, 2012 to investigate the effect of different fertilizer rates on the growth and yield of transplanted aman rice genotypes. The experiment was carried out in split-plot design with three replications accommodating the genotypes (G₁= CNI ₉₀₁₂, G₂= GSR IRRI I ₂, G₃= BINA dhan7 and G₄= Aloran) in sub plot and different fertilizer rates (F₁= No fertilizer, F₂= Half of recommendation rate, F₃= Two third of recommendation rate and F₄= Recommendation rate) in the main plot. Crop growth duration, plant height, tillers no. hill^-1, panicle no. hill^-1, panicle length, total grains panicle^-1, fertility%, 1000 grain-wt. and grain yield were compared for different treatments. Genotypes showed significant results for all the traits except grain yield but fertilizer and their interaction exhibit insignificant results for most of the characters studied. The maximum mean for producing grain yield was observed in F₂ (5.0 t ha^-1) but the minimum in F₁ (4.6 t ha^-1). Therefore, application of no fertilizer had negative impact on grain yield. Apparently, the highest value for grain yield (5.2 t ha^-1) was found in the combinations of G₁ × F₃, G₃ × F₂ and G₄ × F₂ as well as the lowest (4.2 t ha^-1) from G₁ × F₁ combination. Maximum gross return (62500 Tk. ha^-1) and gross margin (58255 Tk. ha^-1) with F₂ suggested that this fertilizer rate was best for profitable cultivation on tested transplanted aman rice genotypes.

Keywords: Fertilizer, Genotype, Transplanted aman rice, Gross return, Rice

Location: BRAC Agricultural Research and Development Centre, Gazipur

Start Date: 00-06-2012

End Date: 00-10-2012

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

To evaluate the influence of different fertilizer rates on the growth and yield of transplanted aman rice genotypes.

Methodology:

Location and experimental design- The research work was conducted in the BRAC Agricultural Research and Development Centre, Gazipur during June to October 2012 to evaluate the appropriate rate of different fertilizer on yield and yield components of GSR genotypes. The characteristics of soil were: pH 6.62, organic matter (OM) 1.99%, N 0.1%, P 51.03μg/g, K 0.08 meq/100g, S 21.54 μg/g, Zn 0.69 μg/g and B 0.25 μg/g. The soil was sandy loam where the percentage of sand, silt and clay were 61.91, 33.33 and 4.76; respectively. The experiment was laid out in split-plot design where fertilizer was in main plot and genotype in sub-plot. The main experimental field was 27.6 m × 27.6 m which was divided into 3 replications. Each replication includes 4 plots & each plot contains 4 sub-plots; in total there were 48 plots. The treatment randomly assigned to each unit plots. Plant materials- Four tested genotypes i.e. G₁= CNI ₉₀₁₂, G₂= GSR IRRI I ₂, G₃= BINA dhan7 and G₄= Aloran (BRAC hybrid) were used as parameter to conduct this experiment. Fertilizer treatment- Different rates of fertilizer were F₁= No fertilizer (control), F₂= Half of recommendation (i.e. 90-40-3530-5 kg ha^-1 of Urea-TSP-MoP-Gypsum-ZnSO₄), F₃= Two third of recommendation (i.e. 120-53.3-46.6-406.6 kg ha^-1 of Urea-TSP-MoP-Gypsum-ZnSO₄) and F₄= Recommended rate (i.e. 180-80-70-60-10 kg ha^-1 of Urea-TSP-MoP-Gypsum-ZnSO₄). The full dose of triple super phosphate (TSP), gypsum, zinc sulphate, one third of urea and half rate of murate of potash (MoP) were applied at the time of final land preparation. The first split of urea was applied at 15 DAT, second was at maximum tillering stage and third installment with rest dose of MoP at panicle initiation stage. Management of agronomic characters- Pre-germinated seeds of respective varieties were sown in the wet seed bed and proper care was taken to raise the seedlings in seed bed. 28 days old seedlings were transplanted with two seedlings in each hill maintaining the spacing with 20 cm × 15 cm on the well puddle plots. Intercultural operations were done as and when required. Five hills (excluding border hills) from each plot were selected and tagged after transplanting for taking yield and yield components data at harvest stage. Morphological data were collected for quantitative characters at the appropriate growth stage of rice plant following the description for Oryza sativa L. (IRRI, 2002). The characters that were evaluated are plant height (cm), number of tillers m^-2, panicles no. m^-2, panicle length (cm), filled grains panicle^-1; unfilled grains panicle^-1, 1000 grain weight (g) and grain yield (ton ha^-1) were recorded. An area of 6 m² was harvested from centre of each plot and the grains were dried, threshed and adjusted at 14% moisture content to estimate the grain yield. Statistical analysis- The data were analyzed statistically using Fisher’s analysis of variance technique and the mean values were separated using least significant differences (LSD) test at 5% level of significance.

Source of Information: International Journal of Agronomy and Agricultural Research, Vol. 9, No. 1, p. 47-54, 2016

Article Link (Online Journal): http://www.innspub.net

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the present study, it is clear that CNI 9012 and GSR IRRI I 2 was earlier than other tested genotypes and applying half of recommendation fertilizer rate produced maximum grain yield as well as achieved highest gross return and gross margin compared with control, two-third of recommendation and recommended fertilizer rates. So, it might be concluded that the application of half of recommendation fertilizer rate is enough to optimize yield as well as economically profitable for the cultivation of rice genotypes; CNI ₉₀₁₂, GSR IRRI I ₂, BINA dhan7 and Aloran in transplanted aman season. However, further investigation is necessary to draw a definite conclusion.

Knowledge Management: Journal