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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.19, no.4, 2010³â, pp.251-256
$NH_4^+:NO_3^-$ ½Ãºñ ºñÀ²ÀÌ ±Ý¾îÃÊ Ç÷¯±× ¹¦ »ýÀå°ú »óÅä È­Çмº º¯È­¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Influence of $NH_4^+$ and $NO_3^-$ Ratios in Fertigation Solution on Growth of Snapdragon Plug Seedlings and Changes in Medium Chemical Properties )
ÀÌdz¿Á;ÀÌÁ¾¼®;ÃÖÁ¾¸í; Ãæ³²´ëÇб³ ³ó¾÷»ý¸í°úÇдëÇÐ ¿ø¿¹Çаú;Ãæ³²´ëÇб³ ³ó¾÷»ý¸í°úÇдëÇÐ ¿ø¿¹Çаú;Ãæ³²´ëÇб³ ³ó¾÷»ý¸í°úÇдëÇÐ ¿ø¿¹Çаú;
 
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±Ý¾îÃÊ 'Potomac Red'¸¦ 200°ø Ç÷¯±× Æ®·¹ÀÌ¿¡¼­ À°¹¦Çϸ鼭 $NH_4^+$°ú $NO_3^-$ ºñÀ²À» Á¶ÀýÇÑ ¾×ºñ·Î ½ÃºñÇÑ °á°ú ÃÊÀå, »ýüÁß ¹× °Ç¹°Áß ¸ðµÎ 27 : 73($NH_4^+:NO_3^-$)ÀÇ ºñÀ²·Î ½ÃºñµÈ 󸮿¡¼­ °¡Àå ÁÁÀº »ýÀåÀ» ³ªÅ¸³Â´Ù. ÆÄÁ¾ 56ÀÏ ÈÄ ½Ä¹°Á¶Á÷ÀÇ Áú¼Ò¿Í ÀλêÇÔ·®Àº 27 : 73·Î ½ÃºñµÈ 󸮿¡¼­ °¢°¢ 2.84% ¹× 0.39%·Î °¡Àå ³ô°Ô ºÐ¼®µÇ¾ú´Ù. ½Ä¹°Ã¼³» KÀÇ ÇÔ·®Àº 󸮰£ Â÷À̰¡ ¶Ñ·ÇÇÏÁö ¾Ê¾ÒÁö¸¸, °üºñ¿ë¾×ÀÇ $NH_4^+$ ºñÀ²ÀÌ ³ô¾ÆÁú¼ö·Ï ½Ä¹°Ã¼ÀÇ Ca ¹× Mg ÇÔ·®ÀÌ °¨¼ÒÇÏ´Â °æÇâÀ̾ú´Ù. »óÅäÀÇ pH´Â ÆÄÁ¾ 3ÁÖ ÈĺÎÅÍ $NH_4^+:NO_3^-$ÀÇ ½Ãºñ ºñÀ²¿¡ µû¸¥ 󸮰£ Â÷À̰¡ ¹ß»ýÇÏ¿© 8ÁÖ±îÁö °è¼ÓÀûÀ¸·Î º¯ÇÏ¿´À¸¸ç, $NO_3^-$ÀÇ ºñÀ²ÀÌ Áõ°¡ÇÒ¼ö·Ï Áß¼ºÂÊÀ¸·Î, ±×¸®°í $NH_4^+$ÀÇ ºñÀ²ÀÌ Áõ°¡ÇÒ¼ö·Ï »ê¼ºÂÊÀ¸·Î º¯ÇÏ¿´´Ù. »óÅäÀÇ EC´Â $NH_4^+$ ÀÇ ºñÀ²ÀÌ Áõ°¡ÇÒ¼ö·Ï ³ô¾ÆÁ³°í, 100% $NH_4^+$ 󸮿¡¼­ ÆÄÁ¾ 8ÁÖ ÈÄ $2.2dS{cdot}m^{-1}$±îÁö »ó½ÂÇÏ¿´´Ù. $NH_4^+:NO_3^-$ÀÇ ºñÀ²¿¡ µû¸¥ »óÅäÁß Áú¼Ò ³óµµº¯È­´Â 100 : 0ÀÇ ºñÀ²¿¡¼­ °¡Àå ³ôÀº $NH_4^+$-N ³óµµ¸¦, 0 : 100¿¡¼­ °¡Àå ³ôÀº $NO_3^-$-N ³óµµ¸¦ ³ªÅ¸³»¾ú°í, »óÅäÀÇ Àλê³óµµ´Â 󸮰£ ¶Ñ·ÇÇÑ Â÷À̰¡ ¾øÀÌ ½Ä¹°ÀÌ »ýÀåÇÔ¿¡ µû¶ó Åä¾çÀÇ Àλê³óµµ´Â ³·¾ÆÁ³´Ù. ±×·¯³ª °üºñ¿ë¾×ÀÇ $NH_4^+$ ºñÀ²ÀÌ ³ô¾ÆÁú¼ö·Ï »óÅäÀÇ K, Ca ¹× Mg ³óµµ°¡ ³ô¾ÆÁö´Â °æÇâÀ̾ú´Ù. °üºñ¿ë¾×ÀÇ $NH_4^+:NO_3^-$ÀÇ ºñÀ²¿¡ ´ëÇÑ ½Ä¹°»ýÀå ¹ÝÀÀÀ» °í·ÁÇÒ ¶§ µÎ Áú¼Ò ºñÀ²·Î 27 : 73À¸·Î Á¶ÀýÇÏ´Â °ÍÀÌ Ç÷¯±× À°¹¦¸¦ À§ÇØ ¹Ù¶÷Á÷ÇÏ´Ù°í ÆÇ´ÜÇÏ¿´´Ù.
Objective of this research was to investigate the influence of $NH_4^+$ and $NO_3^-$ ratios in liquid feeding on the growth of snapdragon 'Potomac Red' and changes in medium chemical properties. The seeds were sown into 200 plug trays and fertigated once a week with nutrient solution containing various ratios of $NH_4^+$ and $NO_3^-$ such as 0 : 100, 27 : 73, 50 : 50, 73 : 27, and 100 : 0. The total N concentrations were adjusted to 50, 100 and $150;mg{cdot}L^{-1}$ in plug stages of 2, 3, and 4, respectively. Determination of seedling growth and analysis of plant tissue and root medum were conducted at 56 days after sowing. The treatment of 27 : 73 ($NH_4^+:NO_3^-$) had the greatest plant height, fresh weight, and dry weight. The N and P contents in 27 : 73 ($NH_4^+:NO_3^-$) treatment based on the above ground plant tissues were 2.39 and 0.39%, respectively, which were the greatest among treatments. The elevation of $NH_4^+$ ratio in fertigation solution decreased tissue Ca and Mg contents, but that did not influence tissue K content. The variations in $NH_4^+:NO_3^-$ ratios impacted the soil solution pH and the difference among treatments had been severe since three weeks after sowing. Elevation of $NH_4^+$ ratios in fertigation solution increased electrical conductivity and concentrations of K, Ca, and Mg in soil solution of root medum. The $NH_4^+$ and $NO_3^-$ concentrations in the soil solution were high in weeks 2, 3, and 4, then decreased gradually as the biomass of seedlings increased. Medium P concentration decreased gradually as seedlings grew, but statistical differences were not observed among treatments.
 
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»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.19, no.4, 2010³â, pp.251-256
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201015037859919)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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