Abstract
An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from July to December 2012 to observe the effect of variety, age of tiller seedling used for transplanting and nitrogen management on the yield performance of transplant Aman rice. The experiment consisted of two varieties viz. BRRI dhan49 and BRRI dhan51, two ages tiller seedling viz. 25- and 35-day old, five nitrogen management viz. control (no urea), application of prilled urea @ 215 kg ha-1 (1/2 at 15 DAT+1/2 at 30 DAT), prilled urea @ 215 kg ha-1 (1/3 at 15DAT+1/3 at 30DAT+1/3 at 45DAT ), urea super granules (USG) 1.8 g and USG 2.7 g four-hill-1 in every alternate row. The experiment was laid out in randomized complete block design with three replications. The results revealed that higher plant characters, straw yield and harvest index were obtained from BRRI dhan49 compared to BRRI dhan51. Older seedlings (35-day old) produced higher grain yield to younger seedlings. The highest yield contributing characters and grain yield were obtained when 1.8g USG was applied. The grain yield was highest in 35-day old tiller seedlings of BRRI dhan51 while fertilized with 1.8g USG. This value was lowest when 25-day old tiller seedlings of BRRI dhan51 were fertilized with prilled urea in two split applications. It may be concluded that 35-day tiller seedlings of BRRI dhan51 fertilized with USG 1.8 g four-hill-1 could be used for achieving higher yield of transplant Aman rice. DOI: http://dx.doi.org/10.3329/jbau.v11i2.19903 J. Bangladesh Agril. Univ. 11(2): 249-256, 2013
Highlights
The average yield of rice in Bangladesh is still low, only 2.91 t ha-1which is much lower than that of other rice growing countries of the world (BBS, 2011)
The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to study the effect of variety, age of tiller seedling and nitrogen management on the growth and yield of transplant Aman rice
The experiment consisted of two varieties-BRRI dhan49 and BRRI dhan51, two ages of tiller seedlings -25 and 35-day old, and five nitrogen managements-i. control, ii. application of prilled urea @ 215 kg ha-1 (1/2 at 15 days after transplanting (DAT)+1/2 at 30 DAT), iii. prilled urea @ 215 kg ha-1 (1/3 at 15DAT+1/3 at 30DAT+1/3 at 45DAT), iv
Summary
The average yield of rice in Bangladesh is still low, only 2.91 t ha-1which is much lower than that of other rice growing countries of the world (BBS, 2011). Removal of excess tillers from the mother hill at early stage could help better development for remaining tillers and the separated tillers can be used as seedling for crop production. This technique of transplanting of separated tillers may be a promising alternative for growing post-flood transplant aman rice (Mridha et al, 1991). Efficient fertilizer management gave higher yield of crops and reduced fertilizer cost (Hossain and Islam, 1986). To increase nitrogen use efficiency and reduce yield gap of modern rice cultivars, the right form of nitrogenous fertilizer and appropriate timing of application are very important. The present study was undertaken to examine the influence of variety, age of tiller seedlings and nitrogen management on the performance of transplant Aman rice
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