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Research Detail

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M. S. ISLAM
Chief Scientific Officer
Irrigation and Water Management Division, BARI, Joydebpur, Gazipur 1701

M. M. HOSSAIN
Senior Scientific Officer
Regional Agril. Res. Station, Rahmatpur, BARI,

MD. SHARIFUL ISLAM
Senior Scientific Officer
Regional Agril. Res. Station, Rahmatpur, BARI,

M. A. HOSSAIN
Senior Scientific Officer,
Irrigation and Water Management Division, BARI, Joydebpur, Gazipur 1701

An experiment was conducted in Jamalpur during the Rabi seasons of 2004- 2005 and 2005-2006 to investigate the yield and scab infection of potato variety Diamant under different irrigation frequencies and quantities. Three irrigation intervals, 7, 12 and 17 days along with three levels of water quantities equaling 50, 100 and 150% of depleted soil moisture were tested for yield and scab infection of potato tubers. It was observed in 2004-2005 that irrigation interval of 12 days and watering at 100% depletion of soil moisture produced the highest fresh and total yields of 24.64 t/ha and 27.56 t/ha, respectively, whereas irrigation interval of 7 days and watering at 150% of depleted soil moisture produced the lowest fresh and total yields (21.68 t/ha and 25.98 t/ha, respectively). In 2005-2006, irrigation interval of 12 days and watering at 100% depletion of soil moisture produced the fresh and total yields of 26.27 t/ha and 27.41 t/ha, respectively, and were not found statistically different from those obtained under water application of 150% depleted soil moisture and irrigation interval of 12 days. The scab infected tubers were found the highest 4.30 t/ha in 2004-2005 and 2.97 t/ha in 2005-2006 for water application of 150% depleted soil moisture and 7 days irrigation intervals. This indicates that scab disease is more susceptible to frequent and over irrigation.

  Irrigation interval, Moisture depletion, Scab disease, Potato
  Jamalpur
  00-00-2004
  00-00-2006
  Crop-Soil-Water Management
  Potato

To see the effect of irrigation interval and water quantity on the yield and extent of scab infection of potato variety, Diamant.

The experiment was conducted during the Rabi seasons of 2004-2005 and 2005- 2006 in Brahmaputra flood plain soil. Texturally, it was sandy loam. The field capacity of the soil was 30% by weight and the bulk density was 1.5 grn/cm3. The selected crop was potato and the variety was Diamant. The plot size was 3rnx3m. Each treatment was replicated thrice. The soil moisture was allowed to deplete from field capacity for a certain period (as per design of the treatments) and then, irrigation water was applied meeting the certain percentage of depleted soil water. The treatments were arranged in a randomized block design. T 1= Irrigation at 7 days interval meeting 50% depleted soil moisture T2= Irrigation at 7 days interval meeting 100% depleted soil moisture T3= Irrigation at 7 days interval meeting 150% depleted soil moisture T4= Irrigation at 12 days interval meeting 50% depleted soil moisture T5= Irrigation at 12 days interval meeting 100% depleted soil moisture T6= Irrigation at 12 days interval meeting 150% depleted soil moisture T7= Irrigation at 17 days interval meeting 50% depleted soil moisture T8= Irrigation at 17 days interval meeting 100% depleted soil moisture T9= Irrigation at 17 days interval meeting 150% depleted soil moisture The land was prepared and seeds were sown on 05 December 2004 and 08 December 2005. Row to row spacing was 60 cm and plant to plant spacing, 25 cm. Whole tubers were planted. Furrow method of water application was used in the experiment. Irrigation was applied as per design of the treatments and measured quantity of water was applied to plots. For proper germination of potato seeds, a common irrigation was given to all the treatments on 06 December 2004 and 10 December 2005. Thereafter, the plots were irrigated as per treatment design. Soil moisture was monitored at plantation, before each irrigation and at harvest. From the monitored soil moisture, the required depth of water application was determined using the following equation (Michael, 1978): IR= {(MFc-Mb)/100} X Pb X D.Fertilizers were applied at the rate of N 160 P45 K 130 S 20 Zn 5 B 1 kg/ha. Number of stems/hill, plant height, yield of tubers and number and weight of scab affected potato tubers were recorded. The harvested tubers were then checked for scab disease. In addition to yield and number of fresh tubers, the same were also recorded for scab affected tubers. All these parameters were analyzed statistically using computer software, MSTAT

  Bangladesh J. Agril. Res. 34(4) : 683-692, December 2009
  
Funding Source:
  

It was observed in 2004-2005 that irrigation interval of 12 days and watering at 100% depletion of soil moisture produced the highest fresh and total yields of 24.64 t/ha and 27.56 t/ha, respectively, whereas irrigation interval of 7 days and watering at 150% of depleted soil moisture produced the lowest fresh and total yields (21.68 t/ha and 25.98 t/ha, respectively). In 2005-2006, irrigation interval of 12 days and watering at 100% depletion of soil moisture produced the fresh and total yields of 26.27 t/ha and 27.41 t/ha, respectively, and were not found statistically different from those obtained under water application of 150% depleted soil moisture and irrigation interval of 12 days. The scab infected tubers were found the highest 4.30 t/ha in 2004-2005 and 2.97 t/ha in 2005-2006 for water application of 150% depleted soil moisture and 7 days irrigation intervals. This indicates that scab disease is more susceptible to frequent and over irrigation.

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