Effects of Some Sulfur Containing Substances on Growth of Rice Plant and Chemical Proporties of Paddy Soil

수종함유황물질(數種含硫黃物質)이 수도생육(水稻生育) 및 토양특성(土壤特性)에 미치는 영향(影響)

A pot experiment was carried out using Seomjinbyeo to investigate the effects of some sulfur-containing substances on the growth of rice plants and on soil characteristics. The results are summarized as follows: 1. Soil pH in plots given the sulfur treatments was lower than that in the urea plot during the growing stages. Soil pH in plots given the mineral sulfur treatments was higher than that in the ammonium sulfate plot at the early growth stage of rice. However, as the stage of rice growth progressed, soil pH became similar. After the experiment, soil pH was higher, but the sulfur content of soil was lower in the urea plot compared with that in other sulfur plots. After the experiment, the sulfur content of soil in the ammonium sulfate plot was the lowest among the plots given the sulfur treatments. 2. Plant heights and the number of tillers of the rice plants in plots given the sulfur treatments were higher than those in the urea plot, specially in the number of tillers of the rice plants. 3. Nitrogen and sulfur contents of the tops of rice plants in plots given the sulfur treatments were slightly higher than those in the urea plot. nitrogen and sulfur contents in the ammonium sulfate plot were higher than those in plots given the mineral sulfur treatments at the early growth stage of rice. However, as the stage of rice growth progressed, those in plots given the mineral sulfur treatments were higher. 4. The chlorophyll content in the leaf blade at heading stage in plots given the gypsume and given the mineral sulfur treatments was significantly higher than that in the urea plot. The N/S ratio was negatively correlated with the chlorophyll content.

본(本) 시험(試驗)은 수도(水稻)에 대(對)한 수종(數種)의 함유황물질간(含硫黃物質間)의 효과(效果)를 검토(檢討)하기 위(爲)하여 여진(蠣津)벼를 공시품종(供試品種)으로 하여 pot시험(試驗)을 수행(遂行)한 바 그결과(結果)를 요약(要約)하면 다음과 같다. 1. 수도생육기간중(水稻生育期間中) 토양(土壤) pH는 함유황물질시용(含硫黃物質施用)으로 다소(多少) 낮았으며, 함유황물질간(含硫黃物質間)에 있어서 생육초기(生育初期)에는 광물유황구(鑛物硫黃區)가 유안구(硫安區)보다 pH가 높았지만 생육후기(生育後期)로 갈수록 비슷하였다. 시험후(試驗後) 토양(土壤)에서도 함유황물질시용(含硫黃物質施用)으로 토양(土壤) pH는 다소(多少) 낮았다. 그리고 시험후(試驗後) 토양(土壤)의 유황잔존량(硫黃殘存量)은 함유황물질구(含硫黃物質區)에 다소(多少) 높았지만 함유황물질간(含硫黃物質間)에서는 유안구(硫安區)가 가장 낮았다. 2. 수도(水稻)의 초장(草長) 및 분얼수(分蘖數)는 함유황물질시용(含硫黃物質施用)으로 높은 경향(傾向)으로 특(特)히 초장(草長)보다는 분얼수(分蘖數)에서 더 효과적(效果的)이었다. 그리고 수량(收量)에서도 함유황물질구(含硫黃物質區)에서 다소(多少) 높았으며 그중에서도 광물유황구(鑛物硫黃區)에서 가장 높았다. 3. 식물체중(植物體中) 질소(窒素) 및 유황함량(硫黃含量)은 함유황물질시용(含硫黃物質施用)으로 높아졌으며 함유황물질간(含硫黃物質間)에는 생육초기(生育初期)에 유안구(硫安區)가 광물유황구(鑛物硫黃區)보다 높았지만 생육후기(生育後期)에는 낮았다. 4. 출수기(出穗期) 엽신중(葉身中)의 엽록소(葉綠素) 함량(含量)은 석고(石膏) 및 광물유황구(鑛物硫黃區)가 요소구(尿素區)보다 유의성(有意性)이 있게 높았으며, 엽록소함량(葉綠素含量)과 N/S 비율간(比率間)에는 유의성(有意性)은 없었지만 부(負)의 관계(關係)가 있었다.