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Crop Establishment Method and Time of Planting for Escaping Water Stress and Cold Under Rainfed Low Land Rice Consortium (water Management Component):water Status in the Selected Plots-1995

Dr M Nazmul Hasan
SSO
Irrigation and water Management Division, BRRI, Gazipur-1701,Bangladesh.

M Towfiqul Islam
SSO
Irrigation and water Management Division, BRRI, Gazipur-1701,Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted during T. Aman 1995 in Rajabari area of Rajshahi with 4 different transplanting dates (1^st June, 15^th June, 1^st July and 15^th July). The PVC tubes (one meter long and 2 cm dia) were installed in 16 selected plots of BR11 with 4 plots from each transplanting date. The readings of the PVC tubes were taken at an interval of 3 days to know the water status of the plots. Seepage meter was also installed and readings were taken daily from each of the 16 selected plots to calculate the seepage and percolation rate. Rainfall and evaporation data were collected from the nearest agromet station. Water status during the whole growing period was recorded for each of the selected plots by installing one meter long PVC tubes. Data shows that there was always standing water in all the plots during mid July to end of September. Therefore, there was no shortage of water. Water level was below the soil surface only at the early stage (before mid July) and at the later stage of crop growth. The PVC tube was found only dry at the later part of October, which indicates that there was sufficient water in the root zone soil during the whole growing period except in October. So it may be concluded that the crop did not suffer from water stress during the whole growing period except in October. S&P rate was estimated for each of the 16 selected plots. The average S&P rate was 8 mm/day ranging from 6 to 10 mm/day for different plots.

Keywords: S&P rate, PVC tube, Evaporation

Location: Rajabari area of Rajshahi

Start Date: 00-00-1995

End Date: 00-00-1995

Program Area: Crop-Soil-Water Management

Commodity: Rice, Water management

Objectives:

To determine the impact of transplanting time of rainfed rice on WUE
To determine the optimum planting time of rice to escape water stress

Methodology:

The experiment was conducted during T. Aman 1995 in Rajabari area of Rajshahi with 4 different transplanting dates (1^st June, 15^th June, 1^st July and 15^th July). The PVC tubes (one meter long and 2 cm dia) were installed in 16 selected plots of BR11 with 4 plots from each transplanting date. The readings of the PVC tubes were taken at an interval of 3 days to know the water status of the plots. Seepage meter was also installed and readings were taken daily from each of the 16 selected plots to calculate the seepage and percolation rate. Rainfall and evaporation data were collected from the nearest agromet station. Crop cut samples were harvested for yield estimation. Soil samples were collected from each of the selected plots for determination of soil moisture status and for developing soil moisture characteristics curves. Samples were collected from 3 different depths (0-10 cm, 10-20 cm and 20-30 cm). The WUE was calculated.

Source of Information: Proceedings of the BRRI annual internal Review for 1995, BRRI, Gazipur-1701,Bangladesh

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

There was always standing water in all the plots during mid July to end of September. The PVC tube was found only dry at the later part of October, which indicates that there was sufficient water in the root zone soil during the whole growing period except in October. So it may be concluded that the crop did not suffer from water stress during the whole growing period except in October. S&P rate was estimated for each of the 16 selected plots. The average S&P rate was 8 mm/day ranging from 6 to 10 mm/day for different plots.

Knowledge Management: Report/Proceedings