http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김석동 한국콩연구회 1989 韓國콩硏究會誌 Vol.6 No.2
Symbiotic N₂ fixation in legumes is the culmination of a complex interaction involving host, Rhizobium and environment. Success in obtaining high N₂ fixation by the Rhizobium-legume symbiosis depends on a series of interacting factors: (a)effectiveness and efficiency of the Rhizobium strains present in the inoculum and/or soil in relation to the species and varieties of the legume; (b)competitive ability of the introduced rhizobia in relation to the native rhizobial population; (c)ability of the hose to supply its microsymbiont's nutritional needs; and (d)environmental factors, especially limiting factors in soil, that act an the bacteria and the host. The environment may directly affect the rhizobia or indirectly influence the bacteria through the plant. Fortunately, most of the conditions that benefit the bacteria and enhance N₂ fixation will also be beneficial to the plant, and when conditions are optimums for the: nutrition. The more important and common limiting factors in sail for N₂ fixation are P, Mo and lime deficiency, soil acidity, and toxic levels of exchangeable Al and Mn. The overcoming of these stresses is essential for high N₂ fixation and high yield. Of the many limiting factors, P deficiency is the most important single limiting fatter for N₂ fixation and soybean production. It has been shown that plants dependent on N₂ require more P than plants using mineral N. This need reflects the vital role of P in energy transfer and the large quantity of energy required for the reduction of N₂ to NH₃.
질소량, 온도, 수분포텐셜 조절에 따른 보리유묘의 질소흡수 및 체내동화
金石東,權容雄,蘇昌鎬 韓國作物學會 1993 한국작물학회지 Vol.38 No.5
양액재배를 통하여 질소가급도와온도 및 수분부족 조건에 따른 유모기 보리의 질소 흡수 및 동화와 생장의 변화를 조사하였던 바, 그 결과를 요약하면 다음과 같다. 1. 보리의 질소 흡수량은 양액의 질소가급도가 160ppm까지 높아질수록 증가하였으나 흡수된 질소의 동화는 80ppm에서 최고에 달하였고, 이보다 높아졌을 때는 체내에 무기능질소로 축적되었다. 2. 유묘기(3~4엽기)보리의 질소동화 및 건물생산은 엽중 질소농도가 약 3.4%일 때 최고에 달아혔다. 3. 유묘기 보리의 질소 흡수는 -2bar 이하의 수분 포텐셜 조건 또는 5℃ 이하의 온도조건에서 현저히 감소하였다. Water culture experiments were carried out to elucidate the effects of N availability, temperature and water potential of culture solution on the uptake and assimilation of N and dry matter accumulation by barley seedlings. N assimilation and dry matter accumulation at 3 to 4 leaves stage in barley plants were maximized at about 3.4 % of N concentration in leaf. N assimilation by barley plants increased with increase of nitrate concentration up to 80ppm in the solution. Over this level nitrate began to accumulated in the leaves and stems proportionally to the N availability in culture solution. Nitrate reductase activity increased in parallel with the increase in the concentration of reduced N in leaves. N uptake by barley plants decreased markedly when water potential reduced below -2 bar or when temperature dropped below 5~circC . These results suggest that the basal application rate of N, 60kg per hectare, for the barley crop needs to be re-examined under the concept of N use efficiency with taking into consideration of temperature and soil N availability because about a half of N accumulated in the leaves of barley plant before wintering is known to be lost by winter killing of above-ground part of the plant.
김석동,이행세 한국음향학회 1992 韓國音響學會誌 Vol.11 No.6
신경망을 이용한 음성인식에 관한 연구이다. 우선 음성을 음소로 분리하였다. 그런다음 각각의 음소를 인식하였다. 음소인식을 위해 제어망과 몇 개의 소규모 망으로 구성된 복합신경망을 이용하였다. 제어망은 음소가 어느 집단에 속하는가를 결정하고, 소규모망에서는 각 집단에 속하는 음소를 인식한다. 마지막으로 프레임별 인식 결과를 누적하여 음소를 판별하였다.