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KMID : 1041219900320020094
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Journal of Sericultural and Entomological Science
1990 Volume.32 No. 2 p.94 ~ p.100
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Studies on the Mulberry Variety Yongchonppong
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ÚÓÎÃñç/Park, Kwang Jun
åÄàüæï/ì°ßÓéô/ÑÑÐñà¸/õËò³úû/õËâ×Ö¨/ì°éÌÐñ/Yang, Seong Yeol/Lee, Sang Uk/Kim, Ki Seok/Choi, Zi Hong/Choi, Suk Ryon/Lee, Yong Ki
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Abstract
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Yongchonppon, one of the native varities, is the highest clod resistant. For its practical use, feeding test has been implemented in the ordinary rearing and in the branch realing 1987 through 1988.
The results are summarized as follows.
1. The feeding of Yongchonppong at the 4th and 5th instar made 5% decrease in spring and 10% decrease of cocoon yield in autumn, respectively, while cocoon shell ratio was a little less and percentage of raw silk was a little high, as compared to the feeding of Kaeryangppong.
2. The feeding of Yongchonppong at the 4th instar only showed nearly same rearing result as the feeding of Kaeryangppong.
3. In case of the feeding of Yongchonppong at the 4th instar and early stage of the 5th instar, cocoon yield and percentage of raw silk marked 96% and 97¡98% of Kaeryangppong.
4. The total nitrogen and crude protein of Yongchonnppong was less, while the total carbohydrate, crude ash and crude fat were high, as compared to those of Kaeryangppong. It had more phosphate and boric and less manganese than Kaeryangppong
5. The leaf aereal weight of Yongchonppong was 1.57g/dcm2 and the leaf thickness was 113¥ì. The moisture reducing rate marked 41.3% after three hour exposure to the air.
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