Determination of economic efficiency of deep placement and foliar application of urea fertilizer through the performance of boro rice cv. BRRI dhan29

Ahm Jahangir Alam,Md Anwarul Abedin,Md Rashedur Rahman,Tahmina Aktar

doi:10.3329/ralf.v5i2.38053

Ahm Jahangir Alam, Md Anwarul Abedin + Show 2 more

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https://doi.org/10.3329/ralf.v5i2.38053

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Abstract

Rice is the most extensively cultivated cereal crops in Bangladesh and nitrogenous fertilizer, especially urea is the most pressing fertilizer to supply nutrient in the paddy field. With this view, an experiment was conducted to evaluate the effect of deep placement and foliar application of urea fertilizer on BRRI dhan29 rice cultivar in boro season at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during December 2015 to May 2016. The experiment was laid out in a randomized complete block design considering twelve treatments with three replications. The treatments were- T0 ( No N application), T1 [140 kg N/ha (as prilled urea)], T2 (1.8 g 1-USG + 5 foliar spray @ 1% N solution), T3 (1.8 g 1-USG + 5foliar spray @ 1.5% N solution), T4 (1.8 g 1-USG + 5 foliar spray @ 2% N solution), T5 (1.8 g 2-USG), T6 (2.7 g 1-USG), T7 (2.7 g 1-USG + 3 foliar spray @ 1% N solution), T8 (2.7 g 1-USG + 3 foliar spray @ 1.5% N solution), T9 (2.7 g 1-USG + 3 foliar spray @ 2% N solution), T10 (1.8 g 2-USG + 3 t/ha cowdung), T11 (2.7 g 1-USG + 3 t/ha cowdung). Results showed that the grain and straw yield of the rice variety responded significantly to the application of prilled urea (PU), deep placement of USG and foliar application of N. The highest grain yield (4.8 t/ha) was recorded in T8 which was identical to the yield (4.7 t/ha) obtained in T3. The highest straw yield (6.0 t/ha) was found in T5. The lowest grain yield (3.7 t/ha) and straw yield (4.5 t/ha) were found in T0. Considering the economic efficiency, the treatment T8 showed the maximum gross margin and marginal gross margin with lowest cost per unit of product. Therefore, to get highest grain yield (4.8 t/ha), 82 kg N/ha as USG and 3 foliar spray of N @1.5% concentration i.e. total 219 Kg urea/ha can be applied to the rice field of BRRI dhan29. This will save an amount of 81 Kg urea per rice growing season per hectare.Res. Agric., Livest. Fish.5(2): 157-164, August 2018

Highlights

Bangladesh is an agro based country where agriculture is the single largest sector and the main stay of the country’s economy (Sabnam, 2013)
In Bangladesh, N fertilizer input is as high as 265 kg Nha-1yr-1 in rice-rice cropping pattern (BBS, 2011)
This variety was released for boro season by the Bangladesh Rice Research Institute (BRRI); Joydebpur, Gazipur in 1992 after regional and zonal trial and evaluation

Summary

Introduction

Bangladesh is an agro based country where agriculture is the single largest sector and the main stay of the country’s economy (Sabnam, 2013). Rice (Oryza sativa L.) is the most extensively cultivated cereal crop in Bangladesh. Rice (Oryza sativa L.) is the staple food for more than two billion people in Asia and four hundred millions of people in Africa and Latin America (Aktar, 2017). Farmers of Bangladesh use mainly urea in rice field to meet the demand of nitrogen. For maximizing yield of rice, nitrogenous fertilizer is the kingpin in rice farming. Excessive use of nitrogen fertilizer is one of the major concerns in sustainable agriculture for its decreased N-utilization efficiency by crops and increased N released to the environment, resulting atmosphere and water systems pollution (Zhu et al, 1997). In Bangladesh, N fertilizer input is as high as 265 kg Nha-1yr-1 in rice-rice cropping pattern (BBS, 2011)

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