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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.4, no.1, 1995³â, pp.50-58
ºñÆÄ±« ¿¬¼Ó »ýüÁß ÃøÁ¤ÀåÄ¡ÀÇ °³¹ß ¹× ÀÌ¿¡ ÀÇÇÑ »óÃßÀÇ »ýÀå¹ÝÀÀ ºÐ¼® l. ¾ç¾×ÀÇ À̿ ³óµµ ¹× ¸í¤ý¾Ï 󸮰¡ »ýÀå¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Analysis of Growth Response by Non - destructive, Continuous Measurement of Fresh Weight in Leaf Lettuce 1. Effect of Nutrient Solution and Light Condition on the Growth of Leaf Lettuce )
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These studies were carried out to develop a system for non -destructive and continuous measurement of fresh weight and to analyse the growth response of leaf lettuce under the different nutrient solution and light condition with this system. The developed measurement system was consisted of four load cells and a microcomputer. The output from the system was highly positive correlation with the plant fresh weight above the surface of the hydroponic solution. The top fresh weight of plant could be measured within the error $pm$ 1.0g in the range of 0 - 2000g. The top fresh weight of leaf lettuce increased 44 times at 18th day after transferring to the nutrient solution, and the maximum growth rate was observed at 13th day after transferring. The growth rate was 10.7- 29.6% per day during 18 days. Optimum concentration of the nutrient solution for the growth of lettuce was 1.4 - 2.2 mS/cm of EC level. When the light condition was changed from dark to light, the fresh weight was temporarily decreased, but the fresh weight increased under the opposite condition. Top fresh weight of leaf lettuce in the darkness normally increased within 12 hours after darkness treatment, and then slowly increased until 78 hours under continuous dark condition. After that times, the fresh weight began to decrease.
 
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»óÃß;»ýüÁß;ºñÆÄ±« ¿¬¼ÓÃøÁ¤;À̿³óµµ;leaf lettuce(Lactuca sativa L.);Non-destructive & continuous measurement;fresh weight;ionic concentration.;
 
»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.4, no.1, 1995³â, pp.50-58
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511922404474)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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