Growth and yield of transplanted aman rice under different nitrogen levels

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Research Paper 01/10/2019
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Growth and yield of transplanted aman rice under different nitrogen levels

Swarna Shome, Parimal Kanti Biswas, Md Jafar Ullah, Alak Barman, Sohela Akhter
Int. J. Biosci.15( 4), 266-277, October 2019.
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Nitrogen is not only a major nutrient but also the most limiting nutrient element for rice cultivation. Application of appropriate level of nitrogen can increase growth and yield of rice. Considering this, an experiment was conducted at the Agronomy farm, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during July 2017 to December 2017 in Aman season to examine the effect of different nitrogen levels on yield and yield attributes of transplanted aman rice. The experiment consisted of three nitrogen levels (viz. 50, 100 and 150 kg N ha-1) and four varieties/lines (viz. SAU ADL1, BRRI dhan70, BRRI hybrid dhan6 and SAU ADL11). Results revealed that growth; yield and yield contributing characters of transplanted aman rice were significantly influenced by nitrogen, variety and their interactions. Increasing trend was observed with the increasing level of nitrogen from 50 to 150 kg ha-1 for all growth characters. Maximum grain yield (4.50 t ha-1) and straw yield (8.00 t ha-1) were obtained from 150 kg N ha-1 which were statistically at par with 100 kg N ha-1. The highest harvest index (36.58%) was recorded at 100 kg N ha-1. SAU ADL1 produced highest dry matter hill-1 (99.85 g), 1000-grains weight (31.49 g) and SAU ADL11 gave highest SPAD value. The highest grain yield (5.24 t ha-1) and harvest index (45.44%) were recorded in BRRI hybrid dhan6. Interaction of 150 kg N ha-1 with BRRI hybrid dhan6 gave maximum value of all studied parameters but BRRI dhan70, SAU ADL1 and SAU ADL11 were more responsive to 100 kg N ha-1 to produce better yield of rice.


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