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Yield Response of Boro and T. Aman Rice to Npks Fertilizers in High Ganges River Floodplain Soil

S. M. Zaman
On-Farm Research Division, Bangladesh Agricultural Research Institute (BARI), Khulna

M. R. Amin
Farm Division, BARI, Gazipur-1701, Bangladesh

D. A. Choudhuury
On-Farm Research Division, BARI, Gazipur-1701, Bangladesh

R. U. Choudhuury
Plant Genetic Resources Center, BARI, Gazipur-1701, Bangladesh

M. I. Hossain
Statistics Section, BARI, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted at farmer's field of Kalaroa under Satkhira district, during three consecutive years of Boro and T. Aman season of 2001 to 2003 to determine the response and to find out the optimum rate of nutrients (NPKS) for Boro (Brri dhan28) and T. Aman ( Brri dhan30) rice to NPKS on the yield under AEZ 11. Four different levels of NPKS were assigned in RCB design with 4 dispersed replications. Average of three years study reveals that a considerable response of Boro and T. Aman rice to NPKS was observed. However, the response to N and P was more distinct in comparison to K and S. Similarly, the response was more evident in Boro rice compared with T. Aman rice. Yield of Boro rice increased upto the application of 140, 35, 20 and 20 kg/ha of NPK and S, respectively. But in T. Aman yield was increased up to the application of 95, 20, 20 and 15 kg/ha of NPK and S, respectively. From the regression analysis it was found that the relationship was almost quadratic in nature. The optimum rate of NPKS for Boro rice was 130-25-20-15 kg/ha, respectively whereas for T. Aman rice it was 90-15-15-10 kg/ha of NPKS, respectively.

Keywords: Boro, T. aman, NPKS fertilizer, high Ganges river floodplain

Location: Farmer's field of multilocation testing site, Kalaroa under Satkhira district

Start Date: 00-00-2001

End Date: 00-00-2003

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To determine the optimum rate of nutrients (NPKS) for Boro (Brri dhan28) and T. Aman ( Brri dhan30) rice to NPKS on the yield under AEZ 11.

Methodology:

The experiment was conducted at farmer's field of multilocation testing site (MLT), Kalaroa under Satkhira district during 2001, 2002 and 2003. The land type was medium high land with 8.1 pH. The experimental plot of onion was laid out in randomized complete block design with four dispersed replications. The variety was BRRI dhan28 for Boro and BRRI dhan30 for T. Aman rice.The unit plot size was 5m x 3m. The initial soil organic matter was 1.88%. The total N was 0.092%. P, K and S level were 4.80, 0.22 and 13.21 microgram gm^-1 soils, respectively. Four different levels of N, P, K and S for Boro and T.aman rice was tested based on the soil analysis are shown in Table 1. The experiment was initiated with Boro rice (Var. BRRIdhan28). Forty days old seedlings were transplanted during 21-24 January with a spacing of 25 cm X 15 cm and harvested during the last week of April. Thirty days old seedlings of T.aman rice (var. BRRI dhan30) were transplanted during 4-6 August with a spacing of 20 cm X 15 cm and were harvested during the last week of November. Fertilizer doses were calculated according to original soil status of the experimental plots using Fertilizer Recommendation Guide. The entire quantity of P, K, S and Zn were applied as basal dose at the time of final land preparation and N was applied in three equal splits as top dress at 15 DAT, at maximum tillering stage and before panicle initiation stage. The source of NPK and S were Urea, TSP, MP and Gypsum, respectively. Weeding was done at 20 DAT and 40 DAT. Furadan and Diazinon 60 EC were applied to control insect pests. Data on yield and yield attributes were recorded and analyzed statistically. Regression analysis was done and the optimum and economic dose of fertilizer nutrients were calculated using by the formula Y = b/2c and Y= 1/2c (Pf/Py-b), respectively from the response curve.

Source of Information: Int. J. Sustain. Crop Prod. 2(1): 18-22, 2007

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Fertilizer dose that maximized yield of Boro rice was 145-31-22-18 kg NPKS/ha and 92-35-16-13 kg NPKS/ha for T. Aman rice while 131-27-19-16 kg NPKS/ha was profitable for Boro and 90-16-15-12 kg NPKS/ha for T. Aman in respect of yield and economics. The present recommended dose is relatively lower but judicious that ensures higher yield than that of farmer’s traditional practices; and it will be helpful to improve soil health for sustainable higher yield. So, 131-27-19-16 kg NPKS/ha for Boro and 90-16-15-11 kg NPKS/ha for T.Aman rice could be proposed for recommendation in high Ganges river floodplain area under AEZ 11a.

Knowledge Management: Journal