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Response of Lentil to Bio and Chemical Fertilizers at Farmer’s Field

M. A. H. BHUIYAN
Soil Science Division, BARI, Joydebpur, Gazipur-1701, Bangladesh;

M. S. ISLAM
RARS, BARI, Jessore, Bangladesh,

M. S. AHMED
OFRD, BARI, Faridpur, Bangladesh

Abstract/ Executive Summary:

Field trials were carried out at the Farming System Research & Development site, Hatgavindapur, Faridpur, On-Farm Research Division of Bangladesh Agricultural Research Institute during rabi seasons of 2006-2007 and 2007-2008 with the objectives to evaluate the response of lentil to Rhizobium biofertilizer and to reduce the use of N-fertilizer under farmer’s field condition. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. Unit plot size was 4 m x 5 m. Four fertilizer treatments viz. T₁: 24-22-42-20-5 kg N-P-K-S-Zn ha^-1, T₂: 50-22-42-20-5 kg N-P-K-S-Zn ha^-1, T₃: 0-22-42-20-5 kg N- P-K-S-Zn ha^-1 + Rhizobium Inoculum and T₄: Farmer’s practices were studied. Farmer’s practice was 25-18-21-0-0 kg N-P-K-S-Zn ha^-1. BARI Masur-4 and peat based rhizobial inoculum (strain BARI RLc-102) @ 1.5 kg ha^-1 were used. Result revealed that application of Rhizobium biofertilizer along with PKSZn chemical fertilizers produced the highest nodule number (11.62 plant^-1) and nodule weight (11.94 mg plant^-1), and the seed yield 1.44 t ha^-1. The seed yield was higher in T₃ treatments (N₀P₂₂K₄₂S₂₀Zn₅ + Inoculum) than T₁ (N₂₄P₂₂K₄₂S₂₀Zn₅) and T₂ (N₅₀P₂₂K₄₂S₂₀Zn₅) treatments. No variation was observed in seed yield in treatments T₁, T₂ and T₃ but significantly different from farmer’s practice. Farmer’s practice showed the lowest yield. Economic analysis revealed that T₃ treatment i.e. PKSZn plus Rhizobium inoculum gave the highest 5.36 benefit cost ratio (BCR) followed by T₁ 4.68 and T₂ 3.61. It is evident from the experiment that application of biofertilizer can be used as substitute of nitrogenous fertilizer for higher yield of lentil at farmer’s field in Faridpur.

Keywords: Lentil, Biofertilizer, Chemical fertilizers, Nodulation, Yield, Benefit cost ratio

Location: Farming System Research & Development (FSRD) site, Hatgavindapur of On-Farm Research Division, Bangladesh Agricultural Research Institute in Faridpur district.

Start Date: 00-00-2006

End Date: 00-00-2008

Program Area: Crop-Soil-Water Management

Commodity: Lentil, Bio fertilizer

Objectives:

The response of lentil to Rhizobium biofertilizer along with chemical fertilizers and
To evaluate the reduction of the uses of N-fertilizer for lentil cultivation under farmer’s field condition

Methodology:

Field trials were carried out at the Farming System Research & Development (FSRD) site, Hatgavindapur of On-Farm Research Division, Bangladesh Agricultural Research Institute in Faridpur district during rabi seasons of 2006- 2007 and 2007-2008 in randomized complete block design having four replications with four treatments. The unit plot size was 4 m × 5 m. The variety was BARI Masur-4 and peat based rhizobial inoculum BARI RLc-102 was used for the experiment. There were four treatments viz. T₁: 24-22-42-20-5 kg N-P-KS-Zn ha^-1 (BARC, 2005), T₂: 50-22-42-20-5 kg N-P-K-S-Zn ha^-1 (Recommended by Soil Science Division, BARI), T₃: 0-22-42-20-5 kg N-P-K-S-Zn ha^-1+ Rhizobium Inoculum and T₄: Farmer’s practice was studied. Farmer’s practice was 25-18-21-0-0 kg N-P-K-S-Zn ha^-1. Peat based Rhizobium inoculum was prepared in the Soil Microbiology Laboratory of BARI. The above peat based rhizobial inoculum @ 1.5 kg ha^-1 containing about 108 cells g^-1 inoculum was used. Chemical fertilizers i.e. N, P, K, S and Zn were applied in the treatments @ 24 kg N ha^-1 in T₁ and 50 kg N ha^-1 in T₂ from urea, 22 kg P ha^-1 from TSP, 42 kg K ha^-1 from MoP, 20 kg S ha^-1 from gypsum and 5 kg Zn ha^-1 from zinc oxide in T₁, T₂ and T₃ treatments but in farmer’s practice, 25-18-21-0-0 kg N-P-K-S-Zn ha^-1 was used. The seeds were sown on 16 November 2006 and 27 November 2007. During the experiment, growth and development of plants in the field were carefully observed. Ten plants along with roots were collected at 50% flowering stage from each unit plot. The dry weight of roots; shoots and nodules including nodule numbers were recorded. The plants were harvested on 07 March for 2007 and 02 March for 2008. Data on plant height, 1000-seed weight, stover yield and seed yield were taken. All data were analyzed statistically.

Source of Information: Bangladesh J. Agril. Res. 40(3): 501-506, September 2015, ISSN 0258-7122

Article Link (Online Journal): http://www.banglajol.info/index.php/BJAR/article/view/25424/17075

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It is evident from the experiment that biofertilizer can be used as the substitute of nitrogenous fertilizer in lentil at farmer’s field in Faridpur district of Bangladesh.

Knowledge Management: Journal