Vol. 16 No. 1
Potato (Solanum tuberosum L.) seed tuber production as influenced by intra-row spacing, dehaulming time and nutrient management in lower Indo-Gangetic plains of India
Author(s): S.K. DAS, A. SARKAR, J.K. TARAFDAR AND A. CHAKRABORTY
Abstract: For successful potato cultivation virus free quality planting material is the prime input, which accounts for nearly 40-50% of the total cost of cultivation. Field experiments were conducted during rabi seasons of 2016-17, 2017-18 and 2018-19 at BCKV, Kalyani, WB, India to determine the effects of intra-row spacing, dehaulming time and nutrient management on potato seed tuber production in lower Indo-Gangetic plains of India following seed plot technique. The experiment was laid out in a split split plot design with three replications having twelve treatment combinations viz. Main plot: intra row spacing 2 levels, sub plot: dehaulming time 2 levels and sub sub plot: nutrient management 3 levels. The results showed that with reduction in intra row spacing from 20 to 15cm, dehaulming at 65 DAP and decrease in nutrient levels from 100% RD of NPK to 50% RD of NPK seed grade size (< 75g) tuber yield and numbers and total tuber numbers were increased significantly. Intrarow plant spacing and nutrient levels had a marked effect on disease incidence and intensity. Haulm cutting at 65 days after planting was found to be safer considering the aphid population build up and transmission of viral disease through it. It was found from the indexing of the viruses in the tubers of Kufri Himalini (breeder seed and produced seed tuber) the seeds were free from PVY, PVX, PVS, PVM and PVLRV. The highest net return and B : C ratio (4.08) was obtained with 15 cm intra row spacing, dehaulming at 65 DAP and 50% RDF of NPK + 0.1% boric acid as foliar application at 40, 50 and 60 DAP followed by B : C ratio (3.99) with 15 cm intra row spacing, dehaulming at 75 DAP and 50% of RDF of NPK + 0.1% boric acid as foliar application at 40, 50 and 60 DAP.
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