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Comparison of Climatic Conditions of Sweet Pepper's Greenhouse between Korea and the Netherlands  

Jeong, Won-Ju (Department of Horticulture & Plant biotechnology, Chonnam National University)
Myoung, Dong-Ju (Department of Horticulture & Plant biotechnology, Chonnam National University)
Lee, Jeong-Hyun (Department of Horticulture & Plant biotechnology, Chonnam National University)
Publication Information
Journal of Bio-Environment Control / v.18, no.3, 2009 , pp. 244-252 More about this Journal
Abstract
This research aims at comparison of climatic conditions of sweet pepper's greenhouse between Korea (KOR) and the Netherlands (NL) to find out the reason of much lower yield in KOR than NL focus-ing on greenhouse climatic conditions. Hence, greenhouse climate data were obtained from each one commercial glasshouse in both countries. The crops (cv. 'Derby') were grown on rockwool slab with two stems per plant with 3.75plants/$m^2$ in KOR and three stems per plant with 2.5plants/$m^2$ or four stems per plant with 1.875plants/$m^2$ in NL. Even though plant density was differed but stem density was on the same to 7.5stems/$m^2$. There was no significantly difference on weekly growth of sweet pepper plant both countries, whereas harvested nodes to whole nodes of NL's plant was more than two times higher compared to KOR. The averaged daily global radiation during the whole growing periods was 14.5MJ/$m^2$/day in KOR and l2.1MJ/$m^2$/day in NL. Averaged 24h temperature was similar to both glasshouse as $21.6^{\circ}C$ in KOR and $21.2^{\circ}C$ in NL during the whole growing periods, however the variance was higher in KOR than NL. Humidity deficit (HD) was observed higher in KOR during the whole growing periods. Averaged day $CO_2$ concentration was measured contrary pattern in both countries because of heating to greenhouse on NL winter season. Averaged 24h temperature and day $CO_2$ concentration to daily global radiation was regular pattern in NL, whereas there are large scatter in KOR. Consequently, more irregular greenhouse climate condition in KOR could be induced irregularly crop growth.
Keywords
climatic condition; global radiation; 24h temperature; humidity deficit$CO_2$ concentration;
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