Abstract :
A field investigation was carried out at vegetable research field, College of Horticulture, Mandsaur during rabi season 2010-11. The soil of the experimental field was light alluvial with sandy loam texture and uniform topography. Sixteen treatment combinations of four varieties (V1-Kufri Jyoti, V2-Kufri Chipsona-2, V3-Kufri Chipsona-1 and V4-Kufri Pushkar) and four nitrogen doses (N1-100 kg /ha, N2-125 kg /ha, N3-150 kg /ha and N4-175 kg /ha) were replicated thrice in factorial randomized block design. The findings of the experiment revealed that among the varieties, Kufri Pushkar recorded maximum leaf area per plant, chlorophyll content in leaves, dry weight of shoot, root and tuber. Maximum ‘A’ grade tuber yield was found with variety Kufri Jyoti followed by Kufri Pushkar. ‘B’ grade tuber yield was found maximum in case of variety Kufri Pushkar followed by Kufri Chipsona-1 and Kufri Jyoti. Analysis of plant after harvesting revealed significant influence of varieties on nitrogen, phosphorus and potassium content in plant. Maximum nitrogen and phosphorus content in plant was recorded with variety Kufri Pushkar. Potassium content in plant showed highest values with variety Kufri Jyoti. Analysis of soil after harvesting recorded significant influence of varieties on available NPK in soil. Highest available nitrogen, phosphorus and potassium were recorded with Kufri Chipsona-2. Nitrogen application enhanced the leaf area and chlorophyll content. Dry weight of shoot, root and tuber was recorded significant influence of nitrogen levels at all the stages. Highest dry weight of shoot, root and tuber was found with application of 150kg N/ha. Nitrogen application had significant effect on grade wise tuber yield. There was increase in ‘A’ grade tuber yield with increasing levels of nitrogen upto 150kg/ha. Application of nitrogen showed increase in nitrogen, phosphorus and potassium content upto 150kg/ha. It also caused increase in available nitrogen and decrease in available phosphorus and potassium in soil. Combined effect of varieties and nitrogen recorded significant effect on chlorophyll content in leaves at 60 DAP. Highest chlorophyll content was found with V4N3. Dry weight of shoot, root and tuber showed significant interaction effect of varieties and nitrogen levels at 90 DAP. Highest fresh weight of tuber and ‘A’ grade tuber yield was found under V4N3. There was significant effect of varieties and nitrogen levels interaction on nitrogen and phosphorus content in plant and available potassium in soil after harvesting.
Keyword :
potato, varieties, nitrogen, chlorophyll, grade wise tuber, nutrient, plant, soil