Horticulture, Environment, and Biotechnology : HEB

  • 제47권6호
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  • Pages.295-299
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  • 2006
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  • 2211-3452(pISSN)
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  • 2211-3460(eISSN)
한국원예학회 (Korean Society of Horticultural Science)
권호 표지

Effect of Irrigation Level on Sap Flow, Relative Water Content, and Photosynthetic Rate during Bulb Development Stage of Garlic Plants

Nam, Sang-Sik;Kim, Byoung-Woon;Chung, Gap-Chae;Choi, Kyeong-Ju;Choi, In-Hu

  • 발행 : 20060000
⟨ 이전 논문 다음 논문 ⟩

초록

This study was conducted to investigate the response of watering to sap flow transport, leaf relative water content, and photosynthetic rate of garlic during vegetative and bulb development stages under water-stressed conditions. The cloves were planted on the polyethylene film-mulched plots at a planting density of 18 × 11 ㎝ in a greenhouse in September 2002 and harvested in May 2003. The irrigation levels during the experimental period were 0 (no irrigation), 10, 20, and 30 ㎜. Volumetric soil water contents (VSWCs) were changed periodically from 32-35 to 21-25% in the irrigation plots, but continuously decreased to 19% in the no irrigation plot. The sap flow of leaf sheath was increased with increase of irrigation level. The highest sap flow was continuously recorded from 9:00 to 19:00 in the irrigated plants, but recorded from 9:00 to 16:00 in the water-stressed plants. Relative water content of leaf was highly associated with VSWC (R² = 0.92**). When VSWC decreased to 20%, relative water content of leaf during the day decreased below 75%, and garlic plant leaf was wilting by. the water stress. Photosynthetic rate was 16.8 μ㏖ㆍm⁻²ㆍs⁻¹ at noon when VSWC increased to: 30%, while photosynthetic rate decreased to 14.5 μ㏖ㆍm⁻²ㆍs⁻¹ when VSWC decreased to 21%.

키워드

참고문헌

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