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Performance of Transplant Aman Rice as Influenced by Tiller Seedlings and Nitrogen Management

Dr. Swapan Kumar Paul
Assistant Professor
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202Bangladesh,

Abstract/ Executive Summary:

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 15 DAT+1/3 at 30 DAT+1/3 at 45 DAT ), 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.

Keywords: Tiller seedlings of rice, Prilled urea, USG, Aman

Location: Mymensingh

Start Date: 00-00-2012

End Date: 00-00-2012

Program Area: Variety and Species

Commodity: Fertilizer

Objectives:

To observe the effect of variety, age of tiller seedling used for transplanting and nitrogen management on the yield performance of transplant Aman rice

Methodology:

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 experimental area belongs to the non-calcareous dark grey soil under Agro-ecological Zone of the Old Brahmaputra Floodplain (AEZ-9). The land was silty loam in texture having a soil pH 6.42, moderate in organic matter content. 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 DAT+1/2 at 30 DAT), iii. prilled urea @ 215 kg ha^-1 (1/3 at 15 DAT+1/3 at 30 DAT+1/3 at 45 DAT), iv. USG 1.8g four-hill^-1 in every alternate row and v. USG 2.7g four-hill^-1 in every alternate row. The experiment was laid out in a randomized complete block design with three replications. Plot size was 4.0 m x 2.5 m and total number of plots was 60. Tillers were separated from 25 and 35 days after transplanting from the previously transplanted rice crop and then transplanted in the main field according to experimental plan. The experimental plots were fertilized with triple super phosphate, muriate of potash, gypsum and zinc sulphate @ 100, 70, 60 and 10 kg ha^-1, respectively. The entire amount of fertilizers except urea was applied at final land preparation. Prilled urea and USG were applied following the specification of treatments. Five hills were randomly selected in each unit plot excluding boarder rows to record the data on yield contributing characters. Grain yield and straw yield were determined by harvesting the whole plot. The grain was threshed, cleaned, dried and then weighed. The yield of grain was adjusted to 14% moisture content and then converted to t ha^-1. The recorded data were statistically analyzed using the “Analysis of Variance" technique and the differences among treatment means were adjudged by Duncan's New Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: J. Bangladesh Agril. Univ. 11(2): 249–256, 2013, ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results revealed that BRRI dhan51 had better performance than BRRI dhan49 in terms of grain yield. Older tiller seedlings (35-day old) gave higher grain yield compared to younger ones. Application of 1.8 g USG four-hill^-1 in every alternate row produced higher grain yield among the treatments. From the results it can, therefore, be concluded that 35-day tiller seedlings of BRRI dhan51 while fertilized with USG 1.8 g appears to be a management practice of rice in Aman season.

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