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Optimum Physical Property of Media for the Production of Small Potted Ardisia in Capillary Mat Irrigation System  

Lee, Dong-Soo (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Kwon, Oh-Keun (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Lee, Young-Ran (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Lee, Yong-Beom (Department of Environmental Horticulture, University of Seoul)
Publication Information
Journal of Bio-Environment Control / v.18, no.4, 2009 , pp. 316-325 More about this Journal
Abstract
Adequate conditions of water content and aeration of container media are major environmental factors in the production of pot plant. This experiment was carried out to find optimum physical property of media for the production of small potted Ardisia in capillary mat irrigation system. The plant materials used in this experiment were Ardisia pusilla and Ardisia japonica. Seven substrates were formulated by blending perlite or fresh rice hulls at 20%, 40%, 60% (v/v) with sphagnum peat. Total pore space (TPS) increased by blending sphagnum peat with fresh rice hulls, but decreased by blending sphagnum peat with perlite. As fresh rice hull (FRH) and perlite content increased, air filled pore space (AFP) of substrate increased but container capacity (CC) decreased. Substrate blended with fresh rice hull was higher AFP than blended with perlite and the rate of increase was higher for FRH-containing substrate. As AFP increased, the $CO_2$ concentration in the pot decreased and the $CO_2$ concentration of substrate blended with FRH was higher than blended with perlite. The fresh and dry weight of Ardisia pusilla and A. japonica was the highest in the substrate contained 60% FRH, but the ratio of shoot dry weight to root dry weight was the lowest. The optimum total pore space, air-filled pore space, water holding capacity of substrate for the growth of Ardisia pusilla and A. japonica in the capillary mat irrigation system were 82.8%, 25.6%, and 57.2% respectively.
Keywords
air filled pore space; Ardisia japonica; Ardisia pusilla; container capacity; total pore space;
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