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한국생물환경조절학회 / v.15, no.1, 2006년, pp.84-90 
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질소 시용수준에 따른 배 '신고' 실생묘의 생육과 질소관련물질의 변화
( Effects of Nitrogen Supply Levels on Growth and Nitrogen Substance in Pear (Pyrus pyrifolia cv. Niitaka) Seedlings ) |
| 김송남;최동근;강인규;한광수;최철; 중국산동성과수연구소;전북대학교 생물자원과학부;상주대학교 환경원예학과;우석대학교 애완동물허브자원학과;경북대학교 원예학과;
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| 초 록 |
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| This study was conducted to anticipate nitrate reduction state in tree through measurement of nitrate reductase activity (NRA) and investigate the effect of nitrogen concentrations (100, 200, 400, and 600 $mg;L^{-1}$) on growth, the nitrogen content of various tissue, and NRA of pear (Pyrus pyrifolia cv. Niitaka) seedlings in sand culture. Nutrient solutions used in this experiment were adjusted to pH 6.5 and fixed the ratio of ammonium and nitrate to 1:3 and trickle-irrigated 3 times a day. Tree height and dry weight of various organs in seedlings were higher in low nitrogen concentration (100 and 200 $mg;L^{-1}$) than in high nitrogen concentration (400 and 600 $mg;L^{-1}$). The shoot growth in 600 $mg;L^{-1}$ was extremely poor by nitrogen over supply. Increasing the nitrogen concentration, the concentration of nitrate-N in leaves and roots were insignificantly changed but that of stems increased. The accumulation of total and reduced nitrogen in all organs with increasing concentrations of nitrogen supply were increased at 30 days after treatment but those of all organs at 60 and 90 days after treatment were highest in 600 $mg;L^{-1}$, whereas there were no significant changes among other nitrogen concentration. The in vivo (${+NO_3}^-$) NRA of all organs did not relate to nitrogen concentration but the in vivo (${-NO_3}^-$) NRA of leaves except roots increased with increasing the nitrogen concentration. Therefore, the proper nitrogen concentration to promote growth and nitrate reduction of pear tree was 200 $mg;L^{-1}$. |
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| 키워드 |
| 동양배;영양액;질산환원효소;Pyrus pyrifoli;nitrate reductase;nutrient solution; |
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생물환경조절학회지 / v.15, no.1, 2006년, pp.84-90
한국생물환경조절학회
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200617033442652)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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