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Effect of Integrated Use of Organic Manures and Chemical Fertilizers on Yield, Nutrient Uptake and Nutrient Balance in the Bush Bean - T.aus- T.aman Cropping Pattern

F. RAHMAN
Soil Science Division, BRRI, Gazipur, Bangladesh.

A. T. M. SAKHAWAT HOSSAIN
Soil Science Division, BRRI, Gazipur, Bangladesh.

P. K. SAHA
Soil Science Division, BRRI, Gazipur, Bangladesh.

M. A. MAZID MIAH
Soil Science Division, BRRI, Gazipur, Bangladesh.

Abstract/ Executive Summary:

A study was made on integrated nutrient management in the Bush bean −T. Aus −T. Arnan cropping pattern over three years at BRRI Farm, Gazipur (AEZ-28) during 2000-02. Different packages of chemical fertilizers in combination with organic materials (cowdung and rice straw/bush bean stover) were evaluated to find out a suitable combination for obtaining higher yield of crops. There was a positive effect of crop residue recycling and residual effect of cowdung on the yield of the next crops. Both the soil test based fertilizer and the cowdung with IPNS basis fertilizer treatments gave higher pod yield of bush bean. For T. Aus rice, the highest yield was obtained with the treatment where bush bean stover was used along with IPNS based chemical fertilizer. Again the highest yield of T. Aman rice was observed in the residual effect of cowdung with reduced amount of fertilizer. An excess N uptake was recorded where N was added as fertilizer only. The apparent balance (nutrient added through manures and fertilizers minus nutrient removed by crops) for both N and K was negative while that for P & K was mostly positive.

Keywords: IPNS, Cowdung, Rice straw, Bush bean, Rice, Nutrient balance.

Location: BRRI Farm, Gazipur

Start Date: 00-00-2000

End Date: 00-00-2002

Program Area: Farming System

Commodity: Fertilizer

Objectives:

A field study was conducted with an integrated nutrient management approach in the Bush bean −T. Aus −T. Aman cropping sysem.

Methodology:

A field trial with Bush bean (BARI Jharshim-1) -T. Aus (BR26) -T. Aman (BRRI dhan39) cropping system was conducted at BRRI Farm, Gazipur (AEZ-28 and land type-HL) during 2000-02. The soil of the experimental field was silt loam in texture with pH 6.30, organic carbon (OC) 1.01%, total N 0.1%, available P 4 ppm, exchangeable K 0.18 Cmol kg^-1 available S 11.6 ppm and available Zn 1.4 ppm. The experiment was laid out in a randomized complete block design with six treatment combinations and three replications. Bush bean was the first crop in the pattern. In the two rice seasons (Kharif-I & II) each original plot under treatments T₃ and T₅ was divided into four and two sub-plots, respectively. The sources of N, P, K, S, and Zn were urea, triple superphosphate, muriate of potash, gypsum, and zinc sulfate, respectively. Fertilizers were applied to each crop according to the treatments . In treatment T₅, cowdung @ 5 t/ha on oven dry (OD) basis was applied once a year before sowing bush bean and the chemical fertilizers were applied to this plot as integrated plant nutrition system (IPNS) basis. Bush bean: Full doses of P, K, S, Zn, and organic materials were applied during final land preparation as basal dose. Nitrogen as per treatment was applied in two equal splits at 15 and 35 days after sowing. Bush bean was grown maintaining line-to-line 30 cm spacing. The seed rate of Bush bean was 100 kg/ha. T. Aman rice straw 5t/ha (OD basis) was incorporated 7 days prior to Bush bean sowing (T₄). Bush bean was sown in line in December. T. Aus and T. Aman rice: All P, K, S, and Zn as per treatments were applied as basal and thoroughly incorporated with soil before transplanting. Nitrogen as per treatment was applied in three equal splits (basal 25-30 DAT + 55-60 DAT). Bush bean stover was incorporated at 5 t/ha as oven dry basis at 7 days prior to T. Aus planting (T₄). After T. Aus harvest, the rice straw was incorporated 7 days prior to T. Aman rice planting (T₄). Rice crops were grown maintaining 20 cm x 20 cm spacing in each season. T. Aus was transplanted in March and T. Aman in August. Appropriate cultural and management practices were followed during each crop season. Edible green pods of Bush bean were harvested from the whole plot and the yield was adjusted at oven dry basis. The rice crops were harvested at maturity from 2.5m x 2 m area. The grain yields were recorded at 14% moisture and straw yields at oven dry basis.

Source of Information: Bangladesh J. Agril. Res. 34(1) : 157-164, March 2009, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Soil test based chemical fertilizer application and IPNS based chemical fertilizer adjusted with the nutrient supplied by recycled crop residues and cowdung @ 5 t/ha (oven dry basis) showed similar yield performance on Bush bean. Recycled Bush bean stover along with IPNS based chemical fertilizer application or residual effect of cowdung + 100% N and 50% PKS of STB gave the highest yield in T. Aus rice. In T. Aman rice, residual effect of cowdung along with reduced doses of chemical fertilizer (100% N, 50% of P, K, and S) in the field trial substantially increased the grain yield.

Knowledge Management: Journal