Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)
- Volume 23 Issue 1
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- Pages.34-39
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- 1990
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- 0367-6315(pISSN)
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- 2288-2162(eISSN)
The Influences of Rice Straw and Gypsum Applied to a Saline Soil on the Growth Status of rice Seedlings when Flooded Direct Sowing
볏짚 및 석고시용(石膏施用)이 간척답(干拓畓) 직파(直播)벼의 초기생육(初期生育) 장해(障害)에 미치는 영향(影響)
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Hwang, Seon-Woong
(Agricultural Sciences Institute) ;
- Lee, Choon-Soo (Agricultural Sciences Institute) ;
- Lee, Yong-Jae (Agricultural Sciences Institute) ;
- Kwak, Han-Kang (Agricultural Sciences Institute) ;
- Park, Nae-Jung (Hong Ik University)
- Published : 1990.03.31
Abstract
The experiment was conducted in the pots of flooded saline paddy soil to evaluate influence of rice straw and gypsum application on germination and early growth status of directly sowed rice seedlings. 1. Germination percentage of rice seedlings were higher in treatment sowing at 1 day after submergence than that of treatment sowing at 21 days after submergence, and was severely interrupted by rice straw application. 2. Application of rice straw promoted the release of bicarbonate and volatile fatty acid of submerged water, while the amount of sulfate and soluble cations were decreased as compared to control. 3. Germination percentage of rice seedling had significant negative correlations with chemical characters of submerged water, and was highly affected by submerged water at 7 days after sowing. 4. Rice straw application interrupted germination of rice seedling by increasing pH of submerged water over critical level, and gypsum application depressed the early growth of young seedling dues to high salt concentration. 5. The relaease of bicarbonate was remarkedly increased with increasing pH over 7.5 of submerged water.
염농도(鹽濃度) 0.48%인 식질계(埴質系) 간척지(干拓地) 토양(土壤)에 볏짚과 석고(石膏)를 시용(施用)하고 담수(湛水)한 후 직파시간(直播時間)를 달리한 pot 시험(試驗)에서 벼 유묘(幼苗)의 초기(初期) 생육장해(生育障害) 원인(原因)을 조사(調査)하였다. 1. 발아(發芽)는 담수(湛水) 1일후(日後) 파종구(播種區)가 담수(湛水) 18일후(日後) 파종구(播種區)보다 양호(良好)하였고, 담수(湛水) 18일후(日後) 파종구(播種區)는 볏짚시용(施用)으로 발아율(發芽率)이 극히 불량(不良)하였다. 2. 대조구(對照區)에 비하여 볏짚시용(施用)으로 담수(湛水)중의 pH,
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