K. K. SARKER
IWM Division, BARI, Gazipur
A. R. AKANDA
IWM Division, BARI, Gazipur
B. C. KUNDU
TCRC, BARI, Gazipur
M. A. HAQUE
Soil Science Division, BARI, Gazipur
S. K. BIWAS
IWM Division, BARI, Gazipur
Stolonization, Tuberiszation, Furrow irrigation, Potato
Research field of Irrigation and Water Management Division under Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur
Crop-Soil-Water Management
Irrigation scheduling, Potato
The study was conducted at the research field of Irrigation and Water Management (IWM) Division of Bangladesh Agricultural Research Institute (BARI) in Gazipur during the dry season of November 2015 to February 2016. The soil was silt clay loam with an average field capacity (FC) of 28% (weight basis) and a mean bulk density of 1.5 g/cm3 over 0-60 cm soil profiles in 15 cm soil increment layers. The weather parameters were observed in the study site throughout the crop growing period in the years 2015-2016. The field experiment was laid out in randomized complete block design (RCBD) with six treatments replicated thrice. The treatments consisted of two irrigation levels and three furrow irrigation methods. Two irrigation levels were, (i) Irrigation at stolonization stage (20-25 DAP), tuberiszation stage (40-45 DAP), and tuber enlargement stage (60-65 DAP), (ii) Irrigation at 12-15 days intervals. Three irrigation methods were, (i) alternate furrow irrigation (AFI), (ii) fixed furrow irrigation (FFI) (iii) every furrow irrigation (EFI). The amount of irrigation water was applied up to 100% field capacity. Figures 1a, 1b, and 1c show the irrigation techniques for AFI, FFI, and EFI, respectively. Dry matter was measured at different intervals during the crop growing season. For dry matter estimation, plant samples were partitioned of root, stem, leaf and tubers for each treatment. The dry matter was collected on 22, 41, 63, and 85 DAP during 2015-2016. The roots and tubers were collected and cleaned and washed with clean water. The dry matter of root, stem, leaf, and tubers was dried in the oven at 600C until a constant weight was reached and expressed in g/m2.
Yield, water productivity, and N PK Zn B and TSS content of tubers: The yield contributing characters were recorded from the plants during the experimental period. Two rows were randomly chosen to measure the tuber yield components from each treatment. The number of tubers and marketable tuber yield (t/ha) were measured from fresh weight produced by the plants harvested from the selected two rows of each plot. The potato was manually harvested on February 17, 2016. Field water productivity was calculated as the ratio of tuber yield and total seasonal crop water use. The quality parameters like starch, total soluble solids (TSS, %) and N, P, K, Zn, and B contents of tubers were determined in the laboratory of soil science division of BARI, Gazipur, following standard methods. . TSS was also determined following standard method from Post-Harvest Technology division of BARI, Gazipur.
Statistical analysis
Data on yield attributes and tuber yield and water use efficiency were statistically analyzed to test the effects of irrigation levels and methods on these parameters using R software version 3.1.2. All the treatment means were analyzed following randomized complete block (factorial) design with three replications and compared for any significant differences using R-statistical models at a 5% probability level.
Annual Research Report 2015-2016, Irrigation and Water Management Division, BARI, Joydebpur, Gazipur
Report/Proceedings