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Effect of Nitrogen and Phosphorus on the Growth and Yield of French Bean

M A RAHMAN
Scientific Officer
Soil Science Division, Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh

A. K. M. S. HOQUE
Senior Scientific Officer
Soil Science Division, Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh

M. N. RAHMAN
Scientific Officer
Soil Science Division, Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh

M. B. TALUKDAR
Scientific Officer
Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh

M. S. ISLAM
Scientific Officer
Soil Science Division, Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh

Abstract/ Executive Summary:

A field experiment on French bean was conducted in Old Brahmaputra Floodplain Soil of Jamalpur and Grey Terrace Soil of Joydebpur during 2005-2006 to find out the optimum rates of N and P for yield maximization of French bean. Four levels of nitrogen (0, 100, 150 and 200 kg ha^-1) and 3 levels of phosphorus (0, 40 and 60 kg ha^-1) were used in the experiment. Potassium (K) 80 kg, 10 kg sulphur (S) and 5 t cowdung ha^-1 were applied as a blanket dose. The experiment was laid out in a randomized complete block design with 12 treatments replicated 4 times. Nitrogen and phosphorus alone significantly influenced the pod yield of French bean. Among the N levels, the highest pod yield (13.33 t ha^-1 at Jamalpur & 14.68 t ha^-1 at Joydebpur) were obtained with 150 kg N ha^-1. Among the P levels, the highest pod yield (12.35 t ha^-1 at Jamalpur & 13.69 t ha^-1at Joydebpur) were obtained with 60 kg P ha^-1. Interaction effect was not significant. However, highest pod yield (13.60 t ha^-1 at Jamalpur & 15.05 t ha^-1 at Joydebpur) was obtained from 150 kg N plus 60 kg P ha^-1. Economic analysis showed that 150 kg N plus 40 kg P ha^-1 gave the highest gross margin of Tk. 1,66,684 ha^-1.

Keywords: Nitrogen, Phosphorus, Yield, French bean

Location: BARI Regional Station, Jamalpur and BARI central farm, Joydebpur, Gazipur

Start Date: 00-00-2005

End Date: 00-00-2006

Program Area: Crop-Soil-Water Management

Commodity: French bean

Objectives:

Objective of the study was to find out the requirement of nitrogen and phosphorus for French bean.

Methodology:

The experiment was conducted at BARI Regional Station, Jamalpur and BARI central farm, Joydebpur during 2005-2006 to find out the requirement of nitrogen and phosphorus for French bean. Before starting the experiment, soil samples was collected from the field and analyzed in the laboratory following standard methods. The fertility status of the initial soil sample were analyzed. Organic matter content of the soil was poor. The soil was acidic in nature. Phosphorus, potassium, sulphur, boron and zinc status of the soil were found to be either at par or below the critical level. Based on soil test values the different treatment combinations were formulated as follows: T₁ = N₀P₀kg ha^-1 , T₂ = N₁₀₀ P₀ kgha^-1, T₃ = N₁₅₀ P₀ kg ha^-1, T₄ = N₂₀₀ P₀ kg ha^-1, T₅ = N₀P₄₀ kg ha^-1, T₆ = N₁₀₀ P₄₀ kg ha^-1, T₇ = N₁₅₀ P₄₀ kg ha^-1,T₈= N₂₀₀ P₄₀ kg ha^-1, T₉ = N₀ P₆₀ kg ha^-1, T₁₀ = N₁₀₀ P₆₀ kgha^-1, T₁₁ = N₁₅₀ P₆₀ kg ha^-1,T₁₂ = N₂₀₀ P₆₀ kg ha^-1. There are twelve treatment combinations comprising 4 levels of N (0, 100, 150 and 200 kg ha^-1) and 3 levels of P (0, 40 and 60 kg ha^-1). The treatments were arranged in factorial RCB design with 4 replications. A blanket dose of 80 kg K, 10 kg S and 5 t cowdung ha^-1 was applied in the experiment. The sources of N, P, K and S were urea, TSP, MP and gypsum, respectively. The unit plot size was 3.0 m x 2.4 m. The whole amount of P, K, S, cowdung and ^½ of N were applied at final land preparation and the remaining ½ of N was top dressed 25 days after sowing. The tested variety was BARI French bean-1. The seeds of French bean were sown on late November in both the years at both locations with a spacing of 25 cm x 15 cm. Intercultural operations like weeding, irrigation and pest control measures were done as and when required. Data on yield components were collected. The green pods were harvested 4 times in February at both locations. The collected data were analyzed statistically by Computer following IRRISTAT package.

Source of Information: J.Soil.Nature. 1 (2): 30-34, 2007

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The applications of 150 kg nitrogen, 40 kg phosphorus along with a blanket dose of 80 kg potassium, 10 kg sulphur and 5 t cowdung ha^-1 are found economic for optimum yield of French bean in Old Brahmaputra Floodplain Soil of Jamalpur and Grey Terrace Soil of Joydebpur.

Knowledge Management: Journal