This study was conducted to investigate the effect of four different NH₄?:NO₃? ratios (200:0, 100:100, 50:150, and 0:200 ㎎ㆍℓ?¹) in nutrient solution on growth, the nitrogen concentration of various organs, and in vivo nitrate reductase acti...
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https://www.riss.kr/link?id=A76225102
2006
Korean
525
SCIE,SCOPUS,KCI등재
학술저널
70-76(7쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
This study was conducted to investigate the effect of four different NH₄?:NO₃? ratios (200:0, 100:100, 50:150, and 0:200 ㎎ㆍℓ?¹) in nutrient solution on growth, the nitrogen concentration of various organs, and in vivo nitrate reductase acti...
This study was conducted to investigate the effect of four different NH₄?:NO₃? ratios (200:0, 100:100, 50:150, and 0:200 ㎎ㆍℓ?¹) in nutrient solution on growth, the nitrogen concentration of various organs, and in vivo nitrate reductase activity (NRA) in pear (Pyrus pyrifolia cv. Niitaka) seedlings in sand culture. Nutrient solutions used in this experiment were adjusted to pH 6.5 and trickle?irrigated 3 times a day, having nitrogen concentration of 200 ㎎ㆍℓ?¹. Tree height and dry weight of seedlings were restricted when NO₃? was the sole nitrogen source in the nutrient solution but there was no significant difference among other NH₄?:NO₃? ratios. The concentrations of nitrate?N in leaves and stems were increased with increasing the NO₃? ratio in the nutrient solution, but that of root was not affected. The concentrations of total and reduced nitrogen in leaves and stems increased with increasing the ratios of NH₄? in nutrient solution, but those in roots were insignificantly changed. In vivo ?NO₃? NRA of all organs was not related to the NH₄?:NO₃?ratios, whereas the in vivo ?NO₃? NRA of all organs increased with increasing the ratio of NO₃? in all the organs except roots where it decreased. The nitrate reduction occurred in various organs of pear seedlings. Growth and NRA were higher in ammonium or nitrate alone than combined application. Results showed that recommendable NH₄?:NO₃? ratio for the nutrient solution in pear is 50:150 ㎎ㆍℓ?¹.
NaCl 처리가 풋고추 ‘녹광’과 피망 ‘뉴에이스’의 생육 및 무기이온 함량에 미치는 영향
직파 재배 시 파종 거리, 깊이 및 시기에 따른 일시수확형 고추의 수량에 미치는 영향