Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effects of Pu, Usg and Npk Briquette on Nitrogen Use Efficiency and Yield of Br22 Rice Under Reduced Water Condition

Ms. Hashina. Afroz
Lecturer
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during the aman season of 2012 to investigate the effects of prilled urea (PU), urea super granule (USG) and NPK briquette on NH₄- N concentration in field water, yield and nitrogen (N) use efficiency (NUE) of BR22 rice under reduced water conditions. The experiment was laid out in a randomized complete block design with three replications. There were altogether eight treatment combinations viz. T₁: Control (No N fertilizer), T₂: 52 kg N ha^-1 from USG, T₃: 104 kg N ha^-1 from USG, T₄: 78 kg N ha^-1 from PU, T₅: 120 kg N ha^-1 from PU, T₆: 51 kg N ha^-1 from NPK briquette, T₇: 78 kg N ha^-1 from USG and T₈: 78 kg N ha^-1 from NPK briquette. Water samples were collected from rice field for seven consecutive days after deep placement of USG and the first split application of PU and the samples were analyzed for NH₄-N. The Highest concentration of NH₄-N in water was observed at the second day of PU application followed by gradual decrease with time. The yield contributing characters like plant height, panicle length, number of effective tillers hill^-1 and grains panicle^-1 were significantly influenced by different treatments. The highest grain yield of 3.93 t ha^-1 was recorded from 104 kg N ha^-1 as USG (T₃) and the lowest value of 2.12 t ha^-1 was obtained from control. The N use efficiency was increased when the N was applied as USG. The overall results revealed that application of USG and NPK briquette may be practiced for obtaining better yields in addition to increasing the efficiency of N fertilizer.

Keywords: Prilled urea, Urea super granule, NPK briquette, BR22 rice, Nitrogen use efficiency

Location: BAU, Mymensingh

Start Date: 00-00-2012

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To investigate the effects of prilled urea (PU), urea super granule (USG) and NPK briquette on NH₄- N concentration in field water, yield and nitrogen (N) use efficiency (NUE) of BR22 rice under reduced water conditions.

Methodology:

The study was carried out at the Soil Science Field laboratory of Bangladesh Agricultural University, Mymensingh during the aman season of 2012. The soil of the experimental site belongs to the Sonatala series under the AEZ of Old Brahmaputra Floodplain. The soil was silt loam in texture having pH 6.07, organic matter content 1.10%, total N 0.055%, available P 3.8 ppm, exchangeable K 0.24 me% and available S 12.56 ppm. There were eight treatments as follows: T₁ : Control (No N fertilizer), T₂ : 52 kg N ha^-1 from USG, T₃ :104 kg N ha^-1 from USG, T₄ : 78 kg N ha^-1 from PU, T₅ : 120 kg N ha^-1 from PU, T₆ : 51 kg N ha^-1 from NPK briquette, T₇: 78 kg N ha^-1 from USG and T₈ : 78 kg N ha^-1 from NPK briquette. The experiment was laid out in a Randomized Complete Block Deign (RCBD) with three replications. The total number of unit plots was 24 and the size of unit plot was 6 m × 4 m. All the treatments except T₆ and T₈ received 16 kg P and 42 kg K ha^-1 from TSP and MoP, respectively. About 35 day-old rice seedlings of BR22 were transplanted in the experimental plots on September 8, 2012 by maintaining a spacing of 20 cm × 20 cm. The USG and NPK briquette were collected from IFDC, Bangladesh and PU urea was obtained from the local market of Mymensingh. The USG, NPK briquette and first split of PU were applied after 10 days of transplanting. The second and third splits of PU were applied after 32 and 52 days of transplanting, respectively. After draining out water properly from the plots, PU was applied to the plots followed by mixing with the soils. The USG and NPK briquettes were placed at 8-10 cm depth between four hills at alternate rows. Different intercultural operations such as irrigation, weeding, pest control, etc. were done as and when required. During sampling, water depth was always maintained at 6 cm and for this reason time to time irrigation was done. The field was supposed to irrigate after 3-5 days of depletion of water from the field in order to maintain reduced water condition (alternate wetting and drying condition), although, it was not always feasible practically due to frequent rains. Water samples were collected immediately after application of PU for determining NH₄-N concentration. The concentration of NH₄-N was determined by Phenol-hypochlorite method (Solorzano, 1969).The crop was harvested at full maturity and the data on plant height, panicle length, effective tillers hill^-1, grains panicle^-1, 1000-grain weight, grain and straw yields were recorded. The grain and straw yields were expressed at 14% moisture basis. The grain and straw samples were analyzed for N content following semi-micro Kjeldahl method (Bremner and Mulvaney, 1982). The N uptake by grain and straw was determined from N content and yield data. The N use efficiency (kg grain yield increase kg^-1 N applied) was determined by the following formula: NUE = (Gy_+N - Gy_ON)/ FN, where Gy_+N = grain yield in treatment with N application; Gy_ON = grain yield in treatment without N application and FN = amount of fertilizer N applied (kg ha^-1). All the data were statistically analyzed by F-test and the mean differences were ranked by DMRT at 5% level (Gomez and Gomez, 1984).

Source of Information: J. Bangladesh Agril. Univ. 11(2): 215–220, 2013, ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The deep placement of N fertilizers (USG and NPK briquette) showed better performance with respect to yield and NUE of BR22 rice compared to broadcast application of PU. From overall results, it can be concluded that the treatment T₂ (52 kg N from USG) can be considered as the better treatment for efficient use of N fertilizer and better yield of rice.

Knowledge Management: Journal