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KMID : 0903619990400060711
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Journal of the Korean Society for Horticultural Science
1999 Volume.40 No. 6 p.711 ~ p.714
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Effect of Nitrogen Rates and Drip - irrigation Levels on Leaf Mineral Contents and Growth of Lysimeter - grown ´ Fuji ´ / M.26 Apples
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노희명/Ro, Hee Myong
박진면/김동순/임명순/류순호/Park, Jin Myeon/Kim, Dong Soon/Yiem, Myoung Soon/Yoo, Sun Ho
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Abstract
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Nitrogen rates and drip-irrigation levels during 2 growing seasons were investigated for their effects on leaf mineral contents, shoot growth, and fruit load of ´Fuji´/M.26 apples growing in lysimeters. Trees were cultivated in a pot lysimeter filled with sandy loam. Drip-irrigation levels were -20, -50, and -100 ㎪ of soil matric potential (SMP), and nitrogen rates were 0, 10, and 20 g per tree in 1997 and 0, 25, and 50 g in 1998. Experimental plot was designed by the 32 factorial experiment of randomized block. Drip-irrigation level did not affect leaf mineral contents significantly, but the decreased N rate lowered leaf-N, -K, and -Mn contents. Average shoot growth and the dry mass of pruned branches were highest in the trees drip-irrigated at -20 ㎪ of SMP, but trunk circumferences were highest in the trees drip-irrigated at -50 ㎪ of SMP. The amount of pruning and fruit load were greatest in the trees received 50% N each year.
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