³óÃÌÁøÈïû ³ó¾÷°úÇÐ³í¹®Áý 39(1)1997.6 ¿¡ ½Ç¸° ³í¹®ÀÔ´Ï´Ù.

δâ©ðàソ¡ ÀÇÇÑ ¿©¸§Ã¶ ¼ö¹Ú ù¡òõú¾ß¾ üùÍý

 

ABSTRACT   ßýÖå   î§Öù ¹× Û°Ûö   Ì¿Íý ¹× ÍÅóÌ   î×é©  ìÚéÄÙþúÌ

               *       **      *       *       *       ***
     ßïÙ¥ý³¡¤ì°ùÓôÉ¡¤ÑÑëÈïö¡¤ì÷î¨éð¡¤êäóä¤ÚÓÏíéÜ
Effects of Irrigation Amount on Yield and Sugar Content of Summer Watermelon(Citrullus vulgaris S.)

             *             **             *             *
Myeong-Whoon Seo, Han-Chul Rhee, Yun-Jeong Kim, Jae-Wook Lim
           *               ***
Chang-Jae Yu and Kuen-Woo Park

ABSTRACT : This study was carried out to investigate the effects of irrigation amount on fruit quality and yield of summer watermelon grown in a plastic-house. The irrigation regimes after flowering consisted of continuous   irrigation, non-irrigation, 8-day interval irrigation from 10 days and 20 days after flowering(DAF).
  Soil water tension measured at harvesting time increased up to pF 3.5 in  non-irrigation without causing wilting of plants. The number of settings per plant ranged from 1.8 to 2.0 in all regimes of irrigation.  The continuous irrigation exhibited the highest(11.8%) fruit cracking ratio  while 8-day interval irrigation from 10 DAF showed the lowest(6.8%).  The weight, length and width of fruits increased in proportio

n to the amount of irrigation, while sugar content exhibited highest value(13.2¡£Bx) in non-irrigation.  The sucrose and fructose contents showed positive correlation with sugar contents while glucose did not.  
  As a conclusion continuous irigation for the first 10 days after flowering followed by 8-day interval irrigations seems to be a proper irrigation method to produce summer watermelon considering both yield and sugar content based quality.

 Key words : Watermelon, Irrigation, Quality, Sugar content, Fructose, Sucrose
¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡¦¡
*ÌÈѲԳÒÜõ½òÉýéêÂ(Kyonggi Provincial Rural Development Administration, Hwasong, 445-970 Korea)
**ç­ÑõÒÜåöãËúÐíÞ Ý¼ß£ê®çÝãËúÐíÞ(Pusan Horticultural Experiment Station, RDA, Pusan, 616-300 Korea)
***ÍÔÕòÓÞùÊÎè (Dept. of Hort. Sci., Korea Univ. 136-701 Korea)

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Table 1.  Amount and times of  watering under irrigation regimes.

 
  Before flowering : soil water tension was below pF 2.3 during irrigation
                             period by soil moisture controller       
   After flowering : soil water tension was below pF 2.5 during irrigation
                           period by soil moisture controller.
 
 ¼ö¹Ú ½ÃÇèÆ÷ÀåÀÇ Á¤½Ä±â ÀÌÈĺÎÅÍ ¼öÈ®½Ã ±îÁö 󸮺° Åä¾ç¼öºÐ º¯È­¸¦ º¸¸é ±×¸² 1°ú °°´Ù.
(±×¸² 1 »ý·«)

    Fig.1.  Soil water tension of various irrigation regimes.

           Before flowering : soil water tension was below pF 2.3 during irrigation
                             period by soil moisture controller
           After flowering : soil water tension was below pF 2.5 during irrigation
                             period by soil moisture controller

 º» ½ÃÇè¿¡¼­ÀÇ °ü¼öó¸®ÀÇ ½ÃÇèÀÌ µÇ´Â °³È­±â´Â 8¿ù 1ÀÏ À̾ú´Ù. Á¤½Ä±âºÎÅÍ °³È­±â±îÁöÀÇ ¸ðµç ½ÃÇ豸ÀÇ Åä¾ç¼öºÐ °ü¸®´Â pF2.3À¸·Î Á¶ÀýÇÏ¿´°í, °³È­±â  ÀÌÈÄ ºÎÅÍ´Â pF2.5·Î Á¶ÀýÇÏ¿´´Ù.
  °³È­±â ÀÌÈĺÎÅÍ ¼öÈ®±â±îÁö °ü¼öÇÏÁö ¾ÊÀº ´Ü¼ö±¸´Â ¼öÈ®±â¿¡ À̸£·¯  Åä¾ç¼öºÐÀÇ pF°¡ 3.5 ¼öÁرîÁö ³ô¾ÆÁ³À¸³ª Ãʱâ ê×ð½ïÇÀÎ pF 3.9¿¡´Â ¹ÌÄ¡Áö ¾Ê¾Ò´Ù.  °³È­ 10ÀÏÈÄ ºÎÅÍ 8ÀÏ °£°Ý °ü¼ö󸮴 °³È­±â ºÎÅÍ 10ÀÏ ±îÁö pF 2.5·Î °ü¼öµÇ¾ú°í, Ó¨â©ô¥×âÑ¢ ÀÌÈÄ´Â pF 2.5¸¦ °ü¼ö½ÃÁ¡À¸·Î ÇÏ¿© 2ȸ °ü¼öÇÏ¿´À¸¸ç, 8Àϰ£ÀÇ Ó¨â©±â°£ µ¿¾È Åä¾ç¼öºÐÀÇ pF°¡ 3.0 ¼öÁرîÁö ³ô¾ÆÁ³À¸³ª »ýÀ°¿¡ ÁöÀåÀ» ÁÙ Á¤µµ·Î °ÇÁ¶ÇÑ Åä¾ç¼öºÐ »óÅ´ ¾Æ´Ï¾ú´Ù.
  ¶Ç, °³È­ 20ÀÏÈÄ 8ÀÏ °£°Ý 󸮴 °³È­±â ºÎÅÍ 20ÀÏ ±îÁö pF 2.5¸¦ °ü¼ö½ÃÁ¡À¸·Î ÇÏ¿© 6ȸ °ü¼öÇÑÈÄ 8Àϰ£ Ө⩠ÈÄ 1ȸ °ü¼öÇÑ Ã³¸®±¸¿¡¼­ 8Àϰ£ ´Ü¼ö±â°£ µ¿¾È Åä¾ç¼öºÐÀÇ pF°¡ 2.7 ¼öÁرîÁö ³ô¾ÆÁ³´Ù.  ÇÑÆí, ¹«Ã³¸®ÀÎ °üÇà °ü¼ö±¸´Â °³È­±â ÀÌÈÄ pF 2.5¸¦ °ü¼ö½ÃÁ¡À¸·Î ÇÏ¿© ÃÑ 8ȸ °ü¼öÇÏ¿´´Ù.
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Table 2.  Effect of irrigation regimes on the growth of watermelon.


   °ü¼ö󸮿¡ µû¸¥ °ú½ÇƯ¼ºÀº ÁÖ´ç 2°ú Âø°ú¸¦ ¸ñÇ¥·Î 1 ÁÖ´ç Âø°ú¼ö¿¡¼­ 󸮰£ Â÷À̰¡ ¾øÀÌ ÁÖ´ç 1.8 ~ 2.0°³·Î Âø°ú°¡ ¾çÈ£ÇÏ¿´À½À» º¸¿© ÁÖ¾ú´Ù. ¿­°ú´Â °³È­ 10ÀÏÈÄ 8ÀÏ °£°ÝÀ¸·Î °ü¼öó¸® ÇÑ Ï¡°¡ 6.7%·Î °¡Àå ³·¾Ò°í ´Ù¸¥ 󸮴 10¡­11.8%·Î ´Ù¼Ò ³ô°Ô ³ªÅ¸³ª Ãʱ⠺ñ´ë ÀÌÈÄÀÇ ¼öºÐ°ü¸®´Â pF 2.5 ¼öÁØÀ¸·Î 8ÀÏ °£°ÝÀ¸·Î  °ü¼ö´Â °ÍÀÌ ¿­°ú°¡ »ýÀ°¿¡ ¾çÈ£ÇÔÀ» ³ªÅ¸³»ÁÖ°í ÀÖ´Ù.


Table 3.  Effect of irrigation regimes on the fruit quality of watermelon.


  ¶Ç, Âø°úÀ²Àº °³È­ 10ÀÏÈÄ 8ÀÏ °£°Ý °ü¼ö±¸°¡ 79.0 %À̾úÀ¸¸ç, °üÇà °ü¼ö±¸´Â 81.0 %,  °³È­ 20ÀÏÈÄ 8ÀÏ °£°Ý °ü¼ö±¸´Â 88.9 %, °³È­ÈÄ ´Ü¼ö±¸´Â 90 % ¼øÀ¸·Î ³ô¾ÆÁö´Â  °æÇâÀ» º¸¿´´Ù. ÚÓ Ôõ(1985)Àº ÇÏ°è ½Ã¼³Àç¹è ¼ö¹ÚÀÇ °ü¼ö½ÃÇè¿¡¼­ °ü¼ö 󸮱¸ÀÇ Æò±Õ Âø°úÀ²Àº 78.8%À̶ó ÇÏ¿´°í ì° Ôõ(1993)Àº ¼ö¹Ú ºñ°¡¸²Àç¹è Àç½Ä¹Ðµµ ½ÃÇè¿¡¼­ Âø°úÀ²ÀÌ 48 ~ 86 % ¼öÁØÀ̾ú´Âµ¥ ºñÇÏ¿© ´Ù¼Ò ³ô°Ô ³ªÅ¸³µ´Ù.
  °úÁß ¿ª½Ã °ü¼ö·®ÀÌ °¡Àå ¸¹¾Ò´ø °üÇà °ü¼ö±¸°¡ 1,872g/°³·Î °¡Àå ¹«°Å¿ü°í, °ü¼ö·®ÀÌ Àû¾îÁú ¼ö·Ï °úÁßµµ °¡º­¿öÁ® °³È­ÈÄ ´Ü¼ö±¸´Â 1,272 g/°³À¸·Î °¡Àå ³·Àº ¼öÁØÀ̾ú´Ù.
  °ú½Ç Å©±â¸¦ ³ªÅ¸³»´Â Íýíþ°ú ÍýÌìÀº »ýÀ° °á°ú¿Í °°ÀÌ °ü¼ö·®ÀÌ ¸¹À» ¼ö·Ï °¡Àå Ä¿¼­ °üÇà °ü¼ö±¸°¡ ÍýíþÀÌ 18.4 cm, ÍýÌÓÀÌ 14.1 cm À̾úÀ¸¸ç, °³È­ÈÄ Ó¨â©Ï¡¿¡¼­´Â ÍýíþÀÌ 16.3 cm, ÍýÌÓÀÌ 12.9cm·Î °¡Àå ³·Àº ¼öÁØÀ̾ú´Ù.
  °¢ 󸮰£ ´çµµ´Â <Ç¥ 4>¿¡¼­¿Í °°ÀÌ °ü¼ö·®ÀÌ ¸¹¾Ò´ø °üÇà°ü¼ö±¸°¡ 9.6¡ÆBx·Î °¡Àå ³·Àº â©ñÞÀ̾ú´ø ¹Ý¸é, °ü¼ö·®ÀÌ Àû¾îÁú¼ö·Ï ´çµµ´Â ³ô¾ÆÁ® °³È­ 10ÀÏÈÄ 8ÀÏ °£°Ý °ü¼ö±¸°¡ 12.5¡ÆBx, °³È­ÈÄ Ó¨â©Ï¡´Â °¡Àå ³ôÀº 13.2¡ÆBx¸¦ ³ªÅ¸³»¾ú´Ù.  óÚï£(1970)´Â ¼ö¹ÚÀº °³È­ 20ìí ÀÌÈÄ ºÎÅͰ¡ ¼º¼÷Àû ¹ßÀ°±â·Î¼­ ǰÁú ƯÈ÷ ´çÇÔ·®¿¡ ¿µÇâÇÏ´Â ½Ã±â¶ó°í ÇÏ¿´´Âµ¥, º» ½ÃÇè¿¡¼­µµ °³È­±â ÀÌÈÄÀÇ °ü¼ö·® Â÷À̰¡ ´çµµ¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. ¶Ç, ÓØ Á¾·ùº° ÇÔ·®À» º¸¸é  sucrose´Â °üÇà °ü¼ö±¸¿¡¼­ 25.8 mg/§¢, °³È­ 10ÀÏÈÄ 8ÀÏ °£°Ý 󸮱¸´Â 107.0 mg/§¢, °³È­ÈÄ Ó¨â©Ï¡´Â 126.6 mg/§¢·Î ´çµµ¿¡¼­¿Í °°ÀÌ °ü¼ö·®ÀÌ Àû¾îÁú ¼ö·Ï sucroseµµ ³ô¾ÆÁö´Â °æÇâÀ̾ú´Ù.  ¶Ç fructose ÇÔ·®µµ °üÇà °ü¼ö±¸°¡ 32.8 mg/§¢ À̾ú°í, ÀÌ¾î ´Ù¸¥Ã³¸®µµ °ü¼ö·®ÀÌ Àû¾îÁú ¼ö·Ï fructore ÇÔ·®ÀÌ

 Á¡Á¡ ³ô¾ÆÁ® °³È­ÈÄ Ó¨â©Ï¡ÀÇ °æ¿ì 78.1 mg/§¢·Î °¡Àå ³ôÀº ¼öÁØÀ̾ú´Ù.

Table 4. The content of sugars and yield under irrigation regimes in watermelon

 

    Fig.2. Relationship between sugar content and saccharides in watermelon.


  ±×¸² 2¿¡¼­¿Í °°ÀÌ ´çµµ´Â sucrose¿Í fructose¿Í ïáÀÇ ßÓμμÌõ°¡ ÀÖ¾î ´çµµ¿¡ ¿µÇâÀ» ÁÖ´Â ÓØ×¾´Â sucrose¿Í fructose ÀΰÍÀ¸·Î º¸¿´´Ù.
  ÇÑÆí,  glucose ÇÔ·®Àº 󸮰£¿¡ ÀÏÁ¤ÇÑ °æÇâÀ» ³ªÅ¸³»Áö ¾Ê¾Ò´Âµ¥,  À̰ÍÀº sucrose ¹× fructose¿Í ´Ù¸¥Á¡À» º¸¿©ÁÖ°í ÀÖ´Ù.
  ¼ö·®Àº °üÇà °ü¼ö±¸°¡ 14,650 kg/ha À̾úÀ¸¸ç, °³È­ 20ìí 8ìí °£°Ý±¸´Â °üÇà¿¡ ºñÇØ 99 %, °³È­ 10ÀÏ 8ÀÏ °£°Ý Ï¡´Â 91 %, °³È­ÈÄ ´Ü¼ö±¸´Â 69 % ¼öÁØÀ̾ú´Ù.  
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