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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.10, no.1, 2001³â, pp.50-54
ÀÙ»óÃßÀÇ ¼ö°æÀç¹è½Ã $ extrm{NO}_3$-N°ú $ extrm{NH}_4$-NÀÇ ºñÀ²ÀÌ ¿±Áß nitrate ÇÔ·®¿¡ ¹ÌÄ¡´Â È¿°ú
( Effect of $ extrm{NO}_3$:$ extrm{NH}_4$ Ratio on the $ extrm{NO}_3$ Content in Leaf Lettuce Cultured by a Deep Flow Technique )
±èÇýÁø;±è¿µ½Ä; »ó¸í´ëÇб³ ¿ø¿¹°úÇаú;»ó¸í´ëÇб³ ¿ø¿¹°úÇаú;
 
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ÀÙ»óÃß ¼ö°æÀç¹è½Ã ¹è¾ç¾× ³» NO$_3$-N¿Í NH$_4$-N ºñÀ² ¹× pH Á¶ÀýÀÌ ¿±Áß nitrate ÇÔ·®¿¡ ¹ÌÄ¡´Â È¿°ú¸¦ ±¸¸íÇÏ¿´´Ù. NO$_3$-/NH$_4$$^{+}$ÀÇ ºñÀ² 󸮴 12:1, 10:3, 8:5À̾úÀ¸¸ç, 8:5 󸮱¸¿¡ pH¸¦ ÀÚµ¿ÀûÀ¸·Î Á¶ÀýÇØÁØ Ã³¸®±¸Á¶ ¼³Á¤ÇÏ¿´´Ù. pHÀÇ º¯È­´Â 12:1 󸮱¸¿¡¼­´Â ½ÇÇè±â°£ µ¿¾È °è¼ÓÀûÀ¸·Î »ó½ÂÇÏ´Â °æÇâÀ» º¸¿´°í, NH$_4$$^{+}$ÀÇ ºñÀ²ÀÌ ³ôÀ»¼ö·Ï pH°¡ »ó´çÇÑ ÀúÇÏÇÏ´Ù°¡ ³·Àº ¼öÁØ¿¡¼­ À¯ÁöµÇ¾ú´Ù. NH$_4$$^{+}$ÀÇ ºñÀ²ÀÌ °¡Àå ³ô¾Ò´ø 8:5¿¡ pH¸¦ ÀÚµ¿ÀûÀ¸·Î Á¶ÀýÇØÁØ Ã³¸®±¸¿¡¼­´Â 5.5-6.5 »çÀÌÀÇ ¾ÈÁ¤ÀûÀÎ ¼öÁØÀ¸·Î pH¸¦ À¯ÁöÇÏ¿´´Ù. ¿±Áß nitrate ÇÔ·®Àº Àü¹ÝÀûÀ¸·Î 12:1 󸮱¸¿¡¼­´Â Á¡Á¡ °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´À¸³ª, 12:1°ú 8:5¿¡ pH¸¦ Á¶ÀýÇØÁØ Ã³¸®±¸¿¡¼­´Â ºñ½ÁÇÑ ¾ç»óÀ¸·Î ¼öÈ®½Ã¸¶´Ù Áõ°¡ÇÏ´Â °æÇâÀ» º¸¿´´Ù. Áï, NH$_4$$^{+}$ÀÇ ºñÀ²À» ³ôÀÌ°í ¹è¾ç¾×ÀÇ pH¸¦ Á¶ÀýÇÏ´Â °ÍÀÌ »ýÀ° ¹× ¿±Áß nitrate ÇÔ·®¿¡ °¡Àå ÁÁÀº °ÍÀ¸·Î ³ªÅ¸³µ´Ù
Effect of NO$_3$:NH$_4$ratio and pH of nutrient solution on nitrate content of leaves was investigated for leaf lettuce(Lactuca sativa L.) grown by a deep flow technique. Ratios(in me.L$^{-1}$ ) of NO$_3$:NH$_4$tested were 12:1, 10:3 and 8:5. The treatment of 8:5 NO$_3$:NH$_4$ratio had two solutions, one with uncontrolled pH and the other with automatically controlled pH. Solution pH continuously increased in 12:1 NO$_3$:NH$_4$treatment. Solution pH decreased gradually more as NH$_4$ratio increased. Treatment of 8:5 NO$_3$:NH$_4$with automatic pH control satisfactorily maintained the solution pH in the range of pH 5.5-6.0. Nitrate content in leaves was the greatest in treatment of 12:1 NO$_3$:NH$_4$ and the least in treatment of 8:5 NO$_3$:NH$_4$with automatic pH control. Fresh weight decreased in treatments of 10:3 and 8:5 NO$_3$:NH$_4$, whereas it increased in treatments of 12:1 and 8:5 NO$_3$:NH$_4$with pH control. It was concluded that the growth and leaf nitrate content were the greatest in high NH$_4$treatment with automatic pH control.
 
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»óÃß;¼ö°æÀç¹è;Áú¼ÒºñÀ²;¹è¾ç¾×;¹«Åä¾çÀç¹è;hydroponics;lettuce;nitrogen form;nutrient solution;soilless culture;
 
»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.10, no.1, 2001³â, pp.50-54
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920845804)
¾ð¾î : Çѱ¹¾î
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