http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 유순호 ( Sun Gang Yun (검색결과 7 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
-
요소(尿素)(Urea)를 시용(施用)한 초지(草地)의 토양단면(土壤斷面)에서 무기태질소(無機態窒素) 함량(含量)의 계절적(季節的) 변화
윤순강,유순호,Yun, Sun-Gang,Yoo, Sun-Ho 한국토양비료학회 1991 한국토양비료학회지 Vol.24 No.3
요소(urea)를 시용한 초지의 토양단면에서 무기태질소의 계절적 함량변화를 조사하기 위하여 질소 시용수준(施用水準)을 0, 14, 28 kg/10a로 하고 목초를 재배하면서 봄(5.26), 여름(7.27), 가을(10.18)철에 토양시료를 토양깊이 100cm 까지 20cm 간격으로 채취하여 분석(分析), 검토(檢討)한 결과는 다음과 같다. 1. 봄 철에 질소 무시용구에서는 $NH_4-N$ 함량이 높았으나 14, 28 kg N/10a 처리에서는 $NO_3-N$ 함량이 증가(增加)되었고 $NH_4-N$, $NO_3-N$ 함량은 토양깊이가 깊을수록 모두 감소되는 경향을 보였다. 2. 여름 철 토양 중 $NO_3-N$ 함량(含量)은 0 N < 14 N <28 N 순으로 증가되었고 28 N 처리에서는 토양중 평균 $NO_3-N$ 함량이 42 ppm였다. 3. 가을 철에는 $NH_4-N$ 함량은 전 처리에서 여름 철과 큰 차이가 없었으나 $NO_3-N$ 함량은 여름 철에 비하여 크게 감소(減少)되어서 14 N, 28 N 처리에서 각각 7, 14 ppm 이하로 낮아졌다. 4. 토양 중 전질소 함량은 봄 철에 토양깊이 0~20cm에서 0 N에 비하여 28 N 처리에서 0.042% 낮았으며 전체적으로는 0 N과 28 N 처리 사이에 차이가 적었다. 그러나 토양 전질소(全窒素) 함량에 대한 무기태질소(無機態窒素) 함량 비율은 0 N과 28 N 처리 간에 차이가 컸는데 여름 철에 28 N 처리의 토양깊이 40~100cm에서 무기태질소(無機態窒素) 함량비율은 0 N 처리에 비하여 크게 증가(增加)되었으며 특히 토양깊이 80~100cm에서는 0 N에 비하여 2배 이상 증가되었다. Field experiment was conducted to investigate the seasonal change in inorganic nitrogen content in grassland soil profile after urea application. Urea was applied at the levels of 0 (0N), 14 (14N), and 28 (28N) Kg N per 10a. Soil samples were taken at every 20 cm interval upto 100 cm soil depth in spring (May 26), summer (July 27), and autumn (October 18) and analysed for total and inorganic nitrogen ($NH_4-N$ and $NO_3-N$). The results obtained are as follows ; 1. In spring, the $NH_4-N$ content of ON treatment was higher than $NO_3-N$ content both in surface and subsoil. The urea application increasing both $NH_4-N$ and $NO_3-N$ contents in the surface soils and these contents decreased with soil depth. 2. In summer, increase in urea application rate elevated the $NO_3-N$ content in soil profile of 0 to 100cm and the content reached upto 42 ppm in the 28N treatment. 3. The seasonal difference in $NH_4-N$ content between summer and autumn was insignificant throughout soil profile. Soil $NO_3-N$ content in autumn were 7 and 14 ppm for 14N and 28N respectively, showing very low values compared with that of summer. 4. The ratio of inorganic nitrogen to total nitrogen increased with soil depth and with urea application rates.
-
-
윤순강,유순호 ( Sun Gang Yun,Sun Ho Yoo ) 한국환경농학회 1993 한국환경농학회지 Vol.12 No.3
Nitrogen is an element required to meet optimal plant growth. However, when it was applied (as chemical fertilizer or animal waste) more than the demand of plant and managed it unreasonably can be accumulated in subsoil and leached from soil system. Nitrogen also can be act as an pollutant to soil and water through water contamination if its concentration exceed the critical level. The concentration and downward movement of nitrate in soil is influenced by cultural practices and soil properties. High level of nitrate nitrogen in drinking water is harzadrous for animal and human health, especially for infants and the restoration of the quality of groundwater is impossible by now. Therefore it is the only way to prevent from leaching of nitrate nitrogen to keep the quality of groundwater as vital water resource. The aims of the presentation of this review paper are to understand the relationship between agricultural practices and the concentration of nitrate nitrogen in groundwater and to suggest further informations for the rational management methods to reduce the leaching of nitrate nitrogen in soil.
-
정광용,유순호,윤순강,박우균,권순익,박홍재 한국환경농학회 1994 한국환경농학회지 Vol.13 No.2
固形 畜産廢棄物에 의한 農業環境 汚染을 줄이고 廢棄物 중에 함유된 植物에 유용한 養分物質의 效率的인 再活用을 위하여 中, 小規模 양돈농가에서 비닐하우스 豚糞건조발효 복합시설을 開發하여 적용 가능성과 효율을 구명하고자 농가 實證試驗을 수행하였다. 乾燥床은 圓形 콘크리트 바닥형태를 적용하였고 豚糞의 攪拌은 機械式 攪拌機를 이용하였으며 乾燥床에서 수분이 감소된 豚糞의 醱酵를 위하여 2組 1式의 送風式 醱酵床으로 구성된 乾燥, 醱酵施設에서 시험을 수행하여 얻어진 結果는 다음과 같다. 氣溫이 높은 계절에는 機械式 攪拌機를 이용한 乾燥床에서 最初投入되는 豚糞의 수분함량이 70-80%였던 것이 乾燥床을 통과하여 醱酵床에 투입되는 단계에서의 糞糞 水分含量은 醱酵에 적합한 45-65%에 달하였으나 氣溫이 낮아질수록 乾燥床에서의 攪拌에 의한 水分除去率이 감소되었다. 豚糞乾燥時 水分調節劑로 이미 乾燥된 豚糞을 副材料로 사용하였을 때 水分減少率은 52.1%로 生豚糞만을 乾燥하였을 때에 水分減少率 19.7%에 비하여 水分除去 效果는 32.4% 增加한 結果를 보였다. 生豚糞과 乾燥豚糞 간의 乾燥期間 經過에 따른 豚糞 중 化學成分 含量間에는 큰 차이가 없이 類似한 경향을 보였으며 P₂O_5 含量은 生豚糞에 비하여 乾燥豚糞에서 輕微하게 높은 경향을 보였다. 그리고 生豚糞과 乾燥豚糞 중 無機成分 含量도 큰 차이가 없었으며 成分別로 볼때 CaO가 가장 높았고 다음이 K₂O, MgO, Na₂O였다. 豚糞을 乾燥함에 따른 微生物 密度는 生豚糞에 비하여 乾燥豚糞에서 E. coli 141.9倍 그리고 Streptococci는 236.2倍가 減少하였다. 豚糞 乾燥, 醱酵複合施設의 總費用은 4,185,630원이었으며 本 乾燥施設運用費는 190,000원/年으로 頭當 乾燥施設 관리 所要經費는 985원(200頭 基準)였다. A practical study on a drying and fermentation system equipped with a stirring machine operated mechanically, of pig manure was conducted to prove the efficiency of and practicability to an ordinary pig farm. The type of the drying bed was a round-shaped (r=3m) concrete structure and the stirring machine was adopted to stir and transfer dried pig manure to the fermentation tank. The dried pig manure was put into a fermentation tank (V=18㎥), which was aerated from pipe lines installed at the bottom. While water content of pig manure passing through a drying bed was remarkably reduced than before drying, the drying efficiency of this system decreased in winter. However, the temperature of pig manure piled up in the fermentation room in winter reached over 60℃ and excess water of pig manure was removed during the fermentation process. The reduction rate of water content of pig manure, to which dried pig manure was added as bulking material on the drying bed, was 52.1%, but when dried without bulking material it was only 19.7%. Although the content of P₂O_5 of dried pig manure was slightly higher than that of fresh pig manure, progressive changes in chemical composition between fresh and dried pig manure made no great difference. Among the contents of minerals of fresh and dried pig manure, CaO was the highest and the rest were in the decreasing order of K₂O, MgO, and Na₂O. Population density of E. coli and Streptococci of dried pig manure was reduced by 142 and 236 times that of fresh pig manure, respectively. The installation cost of this drying and fermentation system was 4,185,630 won (approximately 5,232 US $) and operating cost per year was 190,000 won (237.5US $) on the basis of self-labor condition.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
