- 온도가 질산중화연탄상토의 연초묘 생육에 미치는 영향
- Influence of temperature on tobacco seedling grown on neutralized charcoal bed
- ㆍ 저자명
- 이윤환,홍순달
- ㆍ 간행물명
- 한국연초학회지
- ㆍ 권/호정보
- 1982년|4권 1호|pp.43-49 (7 pages)
- ㆍ 발행정보
- 한국연초학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
This experiment was carried out to study the influence of temperature on the growth rate and nutrient uptake of tobacco seedlings grown on neutralized charcoal bed during temporary transplanting. The highest growth rate was obtained at tile temperature of 26-22-$l8^{circ}C$, probably due to fast establishment of roots in the soil. Seedling growth was better in neutralized charcoal bed than in chaffy charcoal bed at each temperature. Days required for fresh weight to reach 20g/10p1ants were shortened by 9~12days as the temperature increased from 18-14-$l0^{circ}C$ to 26-22-$l8^{circ}C$. Compared with chaffy charcoal bed, days required for fresh weight to reach 20g/10 plants with neutralized charcoal bed were shortened by about 5 days, 4 days, and 2days at 18-14-$l0^{circ}C$, 22-18-$l4^{circ}C$, and 26-22-$l8^{circ}C$, respectively. Three macronutrient (N, $P_2O_5,;K_2O$) contents in seedlings increased with increase of temperature. At each temperature, N and $K_2O$ contents in seedlings of neutralized charcoal bed was higher than those of chaffy charcoal bed, whereas that of $P_2O_5$ was low conversely. Nitrate nitrogen from nitric acid that was used to neutralize chaffy charcoal was maintained to tile end of seedling period, providing the source of nitrate nitrogen for the better seedlings.