SEEPAGE AND PERCOLATION LOSS IN THE RICE FIELD OF BANGLADESH AGRICULTURAL UNIVERSITY FARM

A Singha, S M H Islam, M Ahmed and T Akter
Journal of the Sylhet Agricultural University, Volume 1, Issue 1, 2014, Pages 117-122

Abstract:

A study was conducted at the Bangladesh Agricultural University (BAU) Farm in order to determine the seepage and percolation (S and P) loss in the transplanted Aman (T. Aman) rice field during the period from 23 August to 6 November 2010. The variety of rice was BRRI dhan49. The soil was silty loam having 78% silt, 12% sand and 10% clay. The study was conducted following two cylinders method for measuring seepage and percolation and Blaney-Criddle method for estimating evapotranspiration. This loss (S and P) was combined with evapotranspiration to determine the total water requirement. It was observed that the seepage and percolation loss in the study area varied from 1 to 8.50 mm day-1 with an average of 4.18 mm day-1. Total seepage and percolation loss was 307 mm for the whole growing season. The estimated evapotranspiration for the total growing season was found to be 538 mm with an average of 6.49 mm day-1. The total water requirement was 845 mm for the study period. During the study period seepage and percolation and evapotranspiration was 37% and 63% of total water requirement, respectively. Land soaking, land preparation, and surface drainage loss was not considered to determine water requirement.

Keywords:

Seepage and percolation loss, T. Aman rice, water requirement, yield


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A Singha, S M H Islam, M Ahmed and T Akter. 2014. SEEPAGE AND PERCOLATION LOSS IN THE RICE FIELD OF BANGLADESH AGRICULTURAL UNIVERSITY FARM, Journal of the Sylhet Agricultural University 1(1): 117-122.