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수용성 규산질 비료의 시용에 의한 벼 줄기 강도 강화와 수량에 대한 효과
이승빈(Seung Been Lee),주진호(Jin Ho Joo),신중두(Joung Do Shin),김창균(Chang Gyun Kim),정영상(Yeong Sang Jung) 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.6
수용성 규산질 비료가 벼의 생육과 수량에 미치는 영향을 알아보기 위하여 포장 시험을 수행하였다. 기존의 입상 또는 분상 광재 부산물 규산질 비료와 대비하여, 처리 수준에 따른 규산의 벼 흡수 정도를 알아보았다. 시험 장소는 강원도 춘천시 천전리에 있는 강원대학교 부속농장이었다. 2012년 5월 10일에 오대벼 30일 묘를 논 포장에 정식하였으며, 구의 면적은 25 ㎡, 재식 밀도는 15주 m<sup>-2</sup>이었다. 처리한 규산질 비료의 양은 입상 2,000 kg ha<sup>-1</sup>, 분상 60 kg ha<sup>-1</sup>, 수용성 20 kg ha<sup>-1</sup>를 표준으로 50 %, 100 %, 200 %로 각각 시비하여 재배 후 수확하여 분석하였다. 벼의 줄기 강도를 알아보기 위하여 4 번째와 5 번째 마디의 절간 5-cm를 잘라 한쪽을 고정하고 중심에 추를 달아 줄기의 꺾임 강도를 측정하였다. 그 결과 벼 줄기의 강도를 측정해본 결과 무처리에 비해 규산질 비료가 시비된 토양에서 생장한 벼에서 강도가 월등히 높이 나타난 것을 알 수 있었다. 벼 줄기꺾임은 무처리와 비교하여 규산질 비료를 시비한 모든 처리구에서 높게 나타났으며, 수용성 규산질 비료를 시비한 처리구의 벼에서 꺾임 강도가 가장 높게 나타났다. 이는 수용성 규산질 비료가 토양 내 수분과 반응하여 빠르게 흡수되어 벼의 생장에 영향을 미치는 것으로 판단된다. 이는 수량조사에서 알 수 있었는데, 처리량에 비해 127 의 수량 상승률을 보인 입상 광재 규산질 비료보다 상대적으로 적은 양을 시비한 수용성 규산질 비료에서 125 의 수량 상승률을 보여 동등한 효과를 보인 것으로 판단된다. A field experiment was conducted to evaluate effect of water soluble silicate fertilizer (WSS) application on rice plants with respect to comparing with powdery slag-originated silicate fertilizer (PSS) and granular one (GSS). The 30-day seedlings were transplanted on May 10, 2012. The plot size was 25 ㎡, and the planting density was 15 hills m<sup>-2</sup>. The standard application level was 2 kg ha<sup>-1</sup> for WSS, 200 kg ha<sup>-1</sup> for GSS, 200 kg ha<sup>-1</sup> for GSS. The application rates were 50 %, 100 %, and 200 % of the standard levels. The soil and plant samples were taken after harvest on September 10. Strength weight of the stem was measured on the center of the 5-cm of the fourth internode. Nutrient contents and yield of grains and were evaluated. The strength weight of the stem was positively correlated with the silicate content of the stem with the highly significant R<sup>2</sup> of 0.601. The strength of the stem was satisfactorily enforced by application of 50 % WSS and GSS, and 100 % PSS. Application of 50 % or 100 % of WSS showed little difference in rice yield in comparison with application of 100 % of PSS or GSS. Therefore, application of 20 kg ha<sup>-1</sup> of WSS would be recommendable for rice cultivation which enforced stem strength, and increased yield of rice.
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몇가지 채소 유묘의 초기생장과 양분함량에 미치는 바이오차 효과
홍성창 ( Hong Sung-chang ),최순군 ( Chio Soon-kun ),최동호 ( Choi Dong-ho ),허승오 ( Hur Seung-oh ),신중두 ( Shin Jung-do ),장은숙 ( Jang Eun-suk ) 한국환경농학회 2018 한국환경농학회 학술발표논문집 Vol.2018 No.-
Carbon sequestration, amendment on green house gas emission, and soil remediation can enhanced by the biochar. Biochar effects on soil fertility and nutrient cycling. Crops growing on the biochar applied soil could be affected on its characteristics. There are many seeding mixes for a lot of vegetable seedling. The objective of this study was to investigate the effects of biochar contents of seeding mixes on early growing of lettuce (Lactuca sative) and red pepper (Capsicum annunm), The consist of treatments were control(0 : 1, biochar ratio to seeding mixes (w/w)), 1 : 9(10%), 3 : 7 (30%), 5 : 5 (50%), and 7 : 3 (70%), respectively. The pH of mixed substrates were increased from 5.5 (control) to 8.3 (biochar 70%) depending on biochar contents, while the EC were decreased from 2.1 (control) to 0.8 (biochar 70%). As the biochar content increased in the mixed substrate, the T-N and K content were decreased. The plant length, leaf number, and dry weight of lettuce and red pepper were in order of 50%, 30%, 10%, control, and 70%. These characteristics of lettuce and red pepper seedling showed significantly differences. Increasing content of biochar (10%, 30%, and 50%) progressively activate growing of the lettuce and red pepper but at 70% treatment growing of these were retarded. As the biochar content in the mixed substrate increased T-N, P, K, Mg, and Na content of lettuce, 30 days after sowing, were increased, but Ca content not showed differences. 80 days after sowing red pepper seedling showed different nutrient content compared to those of lettuce seedling. The content of K of red pepper seedling increased depending on the biochar content but the content of P, Ca, and Mg were decreased. On the point of view nutrient content of seeding mixes, at the 50% treatment plot, the amount of nitrogen was 80% of the control, but fresh weight of the lettuce and red pepper were most heavy. Thus, it was assumed that early growing of the lettuce and red pepper seedling were affected by the action of biochar that adsorption and holding nutrient reaction in seeding mixes. In conclusion, adding the biochar to seeding mixes was considered as an important measures for growing healthy seedling and carbon sequestration. More field experiments are needed to verify the biochar effect of crop growth over the entire growing season.
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