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Crop Productivity as Affected by Fertilizer Management Options in Boro-t. Aman Cropping Pattern at Farmers' Fields

M. Akkas Ali
On-farm Research Division, Agricultural Research Station, BARI, Pabna.

M. Robiul Alam
On-farm Research Division, Agricultural Research Station, BARI, Pabna.

M. S. H. Molla
On-farm Research Division, Agricultural Research Station, BARI, Pabna.

F. Islam
Horticulture Research Center, Bangladesh Agricultural Research Institute (BARI), Gazipur 1701, Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted at multilocation testing (MLT) site, Sujanagar, Pabna during the year of 2003-2004 to find out a soil test based economically viable fertilizer recommendation for the cropping pattern Boro-T. aman. Six treatments viz., moderate yield goal (MYG), high yield goal (HYG), integrated plant nutrient system (IPNS), recommended fertilizer of FRG' 97 guide (RF), farmers' practice (FP), and absolute control were employed for the study. The grain yield of Boro and T. aman rice increased 18 and 14%, respectively, by IPNS compared to farmers' practice. Total grain yield of rice was increased by about 16% in the IPNS fertilizer package compared to farmers' practice. Fertilizer nutrients supplied both from organic and inorganic sources in adequate amount have a positive effect on productivity of soil. On an average it was found that highest grain yields of Boro rice (5.37 t/ha) and T. aman (4.49 t/ha) were obtained from integrated plant nutrient system (IPNS) where farmers' practice gave yield of 4.55 and 3.94 t/ha. The highest average gross margin (70385 Tk./ha) and marginal benefit cost ratio (3.78) was also obtained from IPNS plots.

Keywords: Crop productivity, Fertilizer management, Cropping pattern

Location: Sujanagar, Pabna

Start Date: 00-00-2003

End Date: 00-00-2004

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

To find out the profitable and viable fertilizer recommendation for Boro-T. aman cropping pattern.

Methodology:

The experiment was carried out at MLT site Sujanagar, Pabna, On-farm Research Division, Bangladesh Agricultural Research Institute (BARI) during the year of 2003 to 2004 in irrigated medium high land of High Ganges River Flood Plain Soil (ABZ-11). The dominant cropping pattern Boro rice-Fallow-T. aman rice was selected based on discussion with local farmers, DAB personnel and available secondary information before starting the experiment. After selecting, the site, a composite soil sample (0-15 cm depth) was collected and analyzed. The analytical results indicated that the soil was alkaline having pH 8.45, organic matter (1.78%), total N (0.10%), P (6.97 µg/g) , and S (9.78 µg/g) , and B (0.27 µg/g of soil), Zn (0.3 µg/g, and K (0.39 meq/100 g of soil). The soil nutrient content showed that organic matter N, P, S, and B were low, Zn was very low whereas, K was very high. The experiment was laid out in a randomized complete block (RCB) design with six dispersed replications. Five different nutrient management packages were tested against control. According to soil analysis data, the doses of different nutrients were calculated by using fertilizer recommendation guide 1997. Fertilizer were used on the basis of whole cropping pattern during the T. aman crop and fertilizer nutrients (P, S, and Zn) were rationalized according to FRG' 97 (i.e., reduction of P 30%, S 50%, and Zn 50%). K fertilizer was used as maintenance dose because K was very high in that soil. Well decomposed cowdung (CD) was used as organic source for IPNS treatment in boro season only and it contained 3, 1, and 3 kg N, P, and K t^-1, respectively. Seedlings were raised on a wet nursery seedbed. Well prepared land was laid out as per treatment having six dispersed replications with unit plot size of 7 m x 6 m. Seedlings of 40- 45 days old boro rice (var. BRRI dhan 29) were transplanted on 16 February 27 and maintaining 20 cm x 15 cm spacing and harvested on 12 and 4 June during 2003 and 2004, respectively. T. aman (var. BRRI dhan 39) was transplanted 30-35 days old seedling on 20 and 5 July maintaining same spacing as of boro and harvested on 31 and 25 October during 2003 and 2004, respectively. Fertilizers were applied as per treatments in both the seasons. Entire quantity of all fertilizers except urea were applied as basal during the final land preparation and mixed thoroughly with soil. Nitrogen fertilizer (urea) was applied as top dress in three equal splits at 15, 30, and 45 days after transplanting (DAT), respectively. Two hand weedings, were done at 30 and 50 DAT. Plant protection measures were carried out as and when required. Measurement of the yield components were taken from ten randomly selected rice hills located at the four sides of the sampling area of each treatment avoiding border hills. Grain and straw yields were measured (14% moisture content) from 4 m² sampling quadrate at the centre of each plot. Straws (harvested at ground level) were dried in the sun properly and their weight was taken from 4m² sampling quadrate of each plot and expressed as t/ha. Collected data were statistically analyzed by using MSTAT soft ware packages and mean differences for each character were compared by Duncan's New Multiple Range Test (DMRT). Cost and return analysis (partial budgeting) of different treatments were done for marginal benefit cost ratio (MBCR). Cost was counted from fertilizer only. Gross return was calculated from two years' mean yield of grain and straw.

Source of Information: Bangladesh J. Agril. Res. 35(2) : 287-296, June 2010, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It appeared that integrated plant nutrient system (IPNS) was found economically profitable and agronomically viable due to continuous nutrient supply from inorganic and organic fertilizer sources. IPNS treatment was found more advantageous for fertilizer management which can sustain soil health. So, soil test based integrated nutrient management systems (IPNS) could be suggested for the production of Boro and T. aman crops in the cropping pattern Boro-T. aman in High Ganges River Flood Plain Soils.

Knowledge Management: Journal