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Effect of Integrated Nutrient Management on the Growth and Yield of Boro Rice (oryza Sativa L.) Cultivars

Swarna Chakraborty
Department of Agronomy, Bangladesh Agricultural University, Mymensingh - 2202, Bangladesh

Afrina Rahman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh - 2202, Bangladesh

Md. Abdus Salam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh - 2202, Bangladesh

Abstract/ Executive Summary:

For sustainable boro rice production in Bangladesh, a balanced fertilization to improve the current soil condition caused by mono-application of inorganic fertilizers and appropriate rice variety selection are very crucial. Therefore, an experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during the boro season of December 2016 to May 2017 to evaluate the effect of integrated nutrient management on two boro rice cultivars. The varieties were BRRI dhan28 and BRRI dhan29 and eight kinds of nutrient management viz., control (no fertilizers), recommended dose of inorganic fertilizers (120-60-40 N, P₂O₅, K₂O kg ha^-1 + gypsum 60 kg ha^-1 and ZnSO₄ @ 10 kg ha^-1), full dose of poultry manure @ 5 t ha^-1, cowdung @ 10 t ha^-1, poultry manure @ 2.5 t ha^-1 + 50% prilled urea and full dose of other inorganic fertilizers, cowdung @ 5 t ha^-1 + 50% prilled urea and full dose of inorganic fertilizers, poultry manure @ 2.5 t ha^-1 + 75% prilled urea and full dose of inorganic fertilizers, and cowdung @ 5 t ha^-1 + 75% prilled urea and full dose of other inorganic fertilizers. The experiment was laid out in a split plot design with three replications. Result showed that, yield and yield components of boro rice were significantly influenced by variety, nutrient management and interaction of variety and nutrient management. In respect of grain yield, BRRI dhan29 produced the maximum yield (5.46 t ha^-1). BRRI dhan28 showed poor performance with all characters and gave the minimum yield (4.07 t ha^-1). In case of nutrient managements, the highest yield and yield component were obtained from poultry manure @ 2.5 t ha^-1 + 50% prilled urea and full dose of inorganic fertilizers and produced the maximum grain yield (5.70 t ha^-1). In the interaction of variety and integrated nutrient management, the highest grain yield (6.83 t ha^-1) and straw yield (7.61 t ha^-1) was obtained from poultry manure @ 2.5 t ha^-1 + 50% prilled urea and full dose of inorganic fertilizers with BRRI dhan29 variety. So, BRRI dhan29 with 2.5 t ha^-1 poultry manure + 50% prilled urea and full dose of the recommended inorganic fertilizers might be a promising practice for boro rice cultivation.

Keywords: Boro rice, Cowdung, Integrated nutrient management, Poultry manure

Location: Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh

Start Date: 00-12-2016

End Date: 00-05-2017

Program Area: Crop-Soil-Water Management

Commodity: Rice, Fertilizer

Objectives:

To observe the effect of variety with integration of organic and inorganic fertilizers on the yield performance of boro rice.

Methodology:

Experimental design and treatments- The experimental study was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh. The experimental field belongs to the non- calcareous dark grey floodplain soil under the Agro-ecological Zone of the Old Brahmaputra Floodplain (AEZ-9) (UNDP and FAO, 1988) located at 24.75° N latitude and 90.50°E longitude at an elevation of 18 m above the sea level. The field was a medium high land with flat and well drained condition with the pH value was 5.9-6.5. The organic and mineral composition of the soil was generally poor. The organic matter, total nitrogen, avail- able phosphorus (P₂O₅) and potassium of the soil ranged from 0.93%, 0.13%, 16.3 ppm and 0.28%, respectively (Laila et al., 2018). The experiment was set up in a two-factorial split-block design, with three replications. There were two rice cultivars (first factor) in the experiment: (1) BRRI dhan28 and (2) BRRI dhan29 assigned in the main plot. Each of the varieties was treated with eight nutrient management practices (second factor) in the sub-plots: (1) Control (no fertilizers) (2) Recom- mended dose of inorganic fertilizers (120-60-40 N, P₂O₅, K₂O kg ha^-1 + gypsum 60 kg ha^-1 and ZnSO₄ @ 10 kg ha^-1) (FRG, 2012) (3) Full dose of poultry manure @ 5 t ha^-1 (4) Cowdung @ 10 t ha^-1 (5) Poultry manure @ 2.5 t ha^-1 + 50% prilled urea and full dose of other inorganic fertilizers (6) Cowdung @ 5 t ha^-1 + 50% prilled urea and full dose of other inorganic fertilizers (7) Poultry manure @ 2.5 t ha^-1 + 75% prilled urea and full dose of other inorganic fertilizers (8) Cowdung @ 5 t ha^-1 + 75% prilled urea and full dose of other inorganic fertilizers. Rice cultivation practices- The size of the unit plot was 5 m² (2.5 m × 2.0 m). The sprouted seeds were sown in the nursery bed on 27 November 2016. After the preparation of the main field, the land was fertilized as per treatment specifications. The whole amount of manures and triple superphosphate, muriate of potash, gypsum and zinc sulphate were applied at final land preparation as per treatment. Prilled urea was applied in three equal splits at 15, 30 and 45 days after transplanting (DAT). The seedlings were uprooted and immediately transferred to the main field on 8 January 2017 at the rate of three seedlings per hill maintaining a spacing of 25 cm × 15 cm. Intercultural operations were done as and when necessary. When 90% of the panicles turned into golden yellow color, the crop was assessed to attain maturity. Five hills (excluding border hills and central 1 m² harvest area) were selected randomly from each unit plot for recording data. An area of central 1 m × 1 m was selected from each plot to record the yield of grain and straw. The two varieties were harvested at different dates. Harvesting of BRRI dhan28 and BRRI dhan28 were done on 30 April 2017 and 8 May 2017, respectively. Grains were then sun dried at 14% moisture level and cleaned. The straw was also sun dried properly. Finally, the yield of grain and straw plot^-1 were recorded and converted to t ha^-1. Data collection and statistical analysis- Data were collected on plant height (cm), number of total tillers plant^-1, number of effective tillers plant^-1, panicle length (cm), number of grains panicle^-1, number of sterile spikelets panicle^-1, 1000-grain weight (g), grain yield (t ha^-1), straw yield (t ha^-1) and harvest index (%). The collected data were compiled and tabulated in proper from and subjected to statistical analysis. Data were analyzed using the analysis of variance technique with the help of computer package program MSTAT-C (Russel, 1986) and mean differences were adjudged by Duncan’s Multiple Range Test (DMRT) (Gomez and Gomez, 1984).

Source of Information: Archives of Agriculture and Environmental Science 5(4): 476-481 (2020)

Article Link (Online Journal): https://doi.org/10.26832/24566632.2020.050407

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

With detailed data on yield contributing characters and yield, the study has strong evidence that BRRI dhan29 produced the highest grain yield compared to BRRI dhan28 and poultry manure @ 2.5 t ha^-1 + 50% prilled urea and full dose of other inorganic fertilizers treatment provided the highest grain yield compared to other nutrient managements. Therefore, BRRI dhan29 with poultry manure @ 2.5 t ha^-1 + 50% prilled urea and full dose of other inorganic fertilizers treatment combination can be used for increasing higher yield and improve soil health. But further studies are required in different regions of the country to confirm the results before recommending at different parts of Bangladesh.

Knowledge Management: Journal