인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
The world’s population is currently facing a large number of problems that need to be resolved as soon as possible. One of these problems is climate change, which is associated with an increase in the concentration of greenhouse gases in the upper atmosphere. Agricultural production has a significant impact on the climate due to the high emissions of nitrous oxide and carbon dioxide from the surface of arable soils. The purpuse of the study is to evaluate the effect of cultivated crops, fallows and soil temperature on the rate of carbon dioxide emissions. The soil temperature under crops and fallows from May to July gradually increases from 8.9-10.1 to 19.2-21.8 °C, then drops to 6.9-7.3 °C. In spring wheat crops, the soil temperature until the middle of the growing season is 0.2-2.2 °C higher than in alfalfa and corn crops and 0.3-1.3 °C lower than in nacked steam. The rate of carbon dioxide emissions significantly depends on the type of crops being cultivated. At the beginning of the growing season, CO 2 emissions range from 37.4 to 64.9 kg/ha, with the maximum observed in alfalfa crops and the minimum in spring wheat. In the dead fallow, the values during this period do not exceed 34.0 kg/ha. An increase in soil temperature led to an increase in the emission rate under crops to 93.2-121.0 kg/ha. The highest rate of CO 2 production per day was observed in alfalfa crops, the minimum in spring wheat crops, and in dead fallow the values were at the level of 80 kg/ha. A decrease in the rate of soil respiration began to occur simultaneously with the cooling period of the soil and correlated well (r=0.85-0.94). The equations developed during the work indicated that, with a high probability (72-89%), a change in soil temperature by a degree Celsius changes daily emissions in the range of ±5.0 kg/ha for wheat fields; ±7.0 kg/ha for corn; ±7.4 kg/ha for alfalfa and about ±3.9 kg/ha for dead fallow. The share of crop effect in the carbon dioxide emission rate is 24.8%, while soil temperature is 67.3%.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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