Effects of Paper Bag Coated Calcium on the Calcium Concentration, Lenticel Development, and Quality in 'Chuhwangbae' Pear Fruits
2008
Choi, J.H. (Pear Experiment Station, NHRI, RDA, Naju, Republic of Korea) | Choi, J.J. (Pear Experiment Station, NHRI, RDA, Naju, Republic of Korea) | Lee, J.S. (Pear Experiment Station, NHRI, RDA, Naju, Republic of Korea) | Moon, B.W. (MㆍHorticultural Technique Institute, Korea National Agriculture College, Hwaseong, Republic of Korea), E-mail: [email protected] | Choi, C. (Kyungpook National University, Daegu, Republic of Korea) | Nam, K.W. (Hankyong National University, Ansung, Republic of Korea) | Um, M.I. (Hankyong National University, Ansung, Republic of Korea)
In a pear fruit 'Chuhwangbae' was investigated the effect of the calcium-coated double paper bag on the physical properties of the paper bag, micro meteorological phenomena, and calcium contents in quality of fruit. The calcium-coated paper bag, compared with official paper bags, did not give any effect on light transmission ratio and tensile strength. The change of the inside relative humidity of the paper bag was a little compared with conventional paper bags, but there was no difference in temperature. The contents of the accumulated calcium of the pericarp was remarkably greater than conventional paper bags during the period of 65 days to 160 days after the full bloom, but the flesh remarkably increased at 160 days. The calcium content per concentration of calcium coating greatly increased in 12% of yellow double paper bags and 9, 12% of newspaper double paper bags in case of the pericarp, and in 3% of yellow double paper bags and 6, 9, 12% of newspaper double paper bags in case of the pericarp. As a result of treatment of a radioactive isotope, the amount of accumulated calcium in the pericarp continued until 60 hours after treatment, but there was no difference in the calcium amount between the flesh and no-treatment pericarp. As to the hardness of fruits at the time of harvest, there was no difference in the concentration in case of a yellow double bags. But newspaper double paper bags 6, 12% was significantly difference. Soluble solid remarkably increased in yellow double paper bags 6, 9% and yellow double paper bags 3, 6, 9%. Also, it did not effect on changes of the pericarp, fruit weight and the color of the pericarp.
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