Article Info 제28권 1호 강원 농업생명환경연구 Vol.28, No.1, pp.15-19, 2016
Title The Optium Planting Density of New Potato Cultivar‘Oryun’and ‘Mibaeg’for Micro-tuber Production in Aeroponics
Author Jeon, S. J.1* , J. H. Maeng1 , A. S. Lee1 , S. J. Choi1 , J. W. Kim2 and I. J. Kim2
Institutions 1Special Crops Experiment Station, Gangwon Agricultural Research and Extension Services, Gangneung 25437, Korea
22Gangwon Agricultural Research and Extension Services, Chuncheon 24226, Korea 
Abstract This study was conducted to optimize planting density for potato micro-tuber production in spring season. Potato in vitro plantlets, cv Oryun and Mibaeg, were grown aeroponically at four different plant densities (8, 16, 32 and 64 plants/m2). Plant height was increased in Oryun varieties from 64.8 cm to 103.8 cm with increased planting density, but in Mibaeg did not differ at height, stem diameter and the number of nodes. Fresh weight was no difference up to 16 plants/m2 in Oryun and 32 plants/m2 in Mibaeg. Leaf area index was linearly increased in Oryun 4.4, 9.3, 12.0 and 23.4, respectively. But Mibaeg was slightly increased from 1.3 to 5.3. The number of tubers and weight per plant was decreased by high planting density in both varieties. However, the yield per square meter were 2.14, 5.17, 6.65 and 7.82 kg in Oryun, 1.38, 2.33, 4.60 and 4.83 kg in Mibaeg. We also observed that the number of micro-tubers, in Oryun 54, 120, 180 and 210 and in Mibaeg 89, 150, 294 and 357. The average tuber weight was 39.2 g in Oryun and 15.1 g in Mibaeg, but there is no difference among the planting density. Even though the maximum yields were 64 plants/m2 in both varities, we concluded that 32 plants/m2 were optimum planting densities, considering the requirments of plantlets and disease caused by excessive planting.
Keyword Aeroponics, Planting density, Potato micro-tuber
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