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KMID : 0903619660020010067
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Journal of the Korean Society for Horticultural Science
1966 Volume.2 No. 1 p.67 ~ p.73
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Study on Nitrogen Translocation in Apple and Pyrus Serotina Pear by Post - Harvest Urea Foliar Application
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Abstract
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1) According to the result of leaf analysis of the sampled leaves made Oct. 20th, two urea foliar applications with 32 lbs of urea diluted to 100 gallons of water significantly increased the total nitrogen contents of apple and Pyrus serotina pear leaves in comparison with nonsprayed or 5 lbs of urea sprayed leaves.
2) According to the result of spur bud analysis made Oct. 20th and Nov. 23, two urea foliar applications with 32 lbs of urea diluted to 100 gallons of water significantly increased the amount of N accumulation in comparison with nonsprayed or 5 lbs of urea sprayed.
3) At the tip of terminal spur buds of apple and Pyrus serotina pear trees with sprays of 32 lbs urea, total nitrogen content was gradually increased from the 1st to the 2nd sampling date in comparison with nonsprayed or 5 lbs of urea sprayed.
4) The damage on the leaves of apple and Pyrus serotina pear by the urea foliar application with 32 lbs of urea to 100 gallons of mater prior to leaf fall was not observed.
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