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Dissemination of N Management Through Use of Leaf Color Chart (lcc)

Akhter Hossain Khan
Principal Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

M.Islam Uddin Mollah,
Principal Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Abhijit Saha
Principal Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

M.A.Quddus
Chief Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Abstract/ Executive Summary:

In T. Aman season, the farmers' were able to save 6 kg N/ha, with a range from -4 to 53 kg N/ha. Grain yields under FP ranged from 4.16 to 5.13 t/ha and for LCC-based N it was 4.40 to 5.30 t/ha. The increase in grain yield ranged from 0.12 to 0.72 t/ha which were about 2 to 16% of the existing farmers yield. In Boro season, the farmers' saved 5 to 30 kg N/ha which were about 4 to 20% of the farmers' existing practice at different locations. Grain yields under FP ranged from 5.72 to 6.33 and for LCC-based N it was 6.09 to 6.39 t/ha. The increase in grain yield ranged from 0.01 to 0.42 t/ha i.e. about 0.1 to 7.3 % only.

Keywords: LCC use, Nitrogen management, T. Aman, Boro rice, Farmers, Extention providers

Location: Kushtia, Meherpur, Chuadanga and Jhenaidah

Start Date: 01-07-2006

End Date: 30-06-2007

Program Area: Crop-Soil-Water Management

Non-commodity: Dissemination

Objectives:

To disseminate the leaf color chart technology for real time N management of rice

Methodology:

This activity has been initiated since 2005 T. Aman season in farmers' plots in four districts of Central-Western Part of Bangladesh with ADB funding and is being continued for 2007 T. Aman season. The districts are Kushtia, Meherpur, Chuadanga and Jhenaidah. At the starting of the activity, discussion among researchers, extension personnel of District and Upazila levels of Department of Agricultural Extension (DAE) followed by group meetings with grass root level extension providers (Sub-Assistant Agricultural Officers) of DAE and NGOs and farmers were held at site level. In T. Aman season 2006 and Boro season 2007, 302 farmers' plots were selected in seven blocks for this activity. The blocks were Patikabari of Kustia Sadar Upazila of Kushtia district; Amdah of Meherpur Sadar of Meherpur district; Dashami, Bhultia and Jolibila of Chuadanga Sadar and Hauli of Damurhuda Upazila of Chuadanga district; and Sadhuhati of Jhenaidah Sadar of Jhenaidah district. The participating farmers' and the concern SAAO were properly trained about the technology. Each farmer's plot was divided into two parts for comparing of LCC based and farmers' practice (FP). Other crop management practices were similar for both the parts of the plot.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2006-07

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Results of T. Aman 2006 revealed that the average total amount of N applied across the blocks under farmers' practice ranged from 101 to 1128 kg/ha and with LCC, it was ranged from 63 to 111 kg/ha. On an average, the farmers' were able to save 6 kg N/ha, with a range from -4 to 53 kg N/ha. Grain yields under FP ranged from 4.16 to 5.13 t/ha and for LCC-based N it was 4.40 to 5.30 t/ha. The average increase in grain yield and decrease in N use were about 8% and 6%, respectively. The average increase in gross return and gross margin for LCC based N management over farmer's practice for all the farmers in 7 locations were Tk.3644 and Tk.3645 /ha, respectively. Results of Boro season 2007 revealed that the average total amount of N applied across the blocks under farmers' practice ranged from 126 to 153 kg/ha and with LCC, it ranged from 118 to 123 kg/ha. The farmers' saved 5 to 30 kg N/ha which were about 4 to 20% of the farmers' existing practice at different locations. Grain yields under FP ranged from 5.72 to 6.33 and for LCC-based N it was 6.09 to 6.39 t/ha. The average increase in grain yield and decrease in N use were about 2.4% and 12%, respectively. The average increase in gross return and gross margin for all the farmers in 7 locations were 1680 and 1798 Tk/ha, respectively. Results of the four seasons (including previous T. Aman and Boro seasons) in 1027 farmers'fields at 11 locations reveal that there are opportunities for increasing farmers' income and livelihood by the use of LCC for N fertilizer management in rice.

Knowledge Management: Report/Proceedings