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KMID : 1041219900320020113
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Journal of Sericultural and Entomological Science
1990 Volume.32 No. 2 p.113 ~ p.117
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Recovery of Several Mulberry Varieties from Late Frost Damage
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李種漢/Lee, Jong Han
金東一/丁漢鎭/李梡周/Kim, Dong Il/Jeong, Han Jin/Lee, Won Chu
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Abstract
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The recovery of mulberry from a late frost (April 24 to 27) was investigated for four varieties: Kaeryangppong, CheongiIppong, and Jamsang 21 and 22 in Cheongju area, Chungbuk Province.
1. Unfavourable meteorlogical conditions for recovery of mulberry followed the early late frost: lower than normal temperatures in mid·April, less sunshine in early and mid·May, lower temperatures and early and less precipitation in late-May, and less precipitation than normal in early June.
2. Jamsang 21 grew to the 2-3 leaf stage first, at which time Kaeryangppong and Jamsang 22 were at the 1∼2 leaf stage, and Cheongilppong was at the swallow-bill shape~1 leaf stage.
3. The first leaf stage occurred on May 12, 15 days after the frost and, 19 days later in an average year. The difference lasted until the harvesting season, the 6 leaf stage.
4. Young shoot length was 50~58% of that in 1989. Kaeryangppong was the shortest at 50% and the Jamsang 21 highest 21 highest at 58% of 1989 values.
5. Leaf number was 52∼67% that in 1989, Kaeryangppong was the lowest at 52% and the Jamsang 21 highest at 67% of 1989 values.
6. Young shoot and leaf weight was 44∼63%, and leaf weight 39∼61%, compared to 1989. Kaeryangppoong and CheongiIppong were the lowest, Jamsang 21 and Jamsang 22 were the highest, compared to 1989 data.
7. Young shoot length was 50~58% compared with 1989. Kaeryangppong was the lowest as 50%, the highest Jamsang 21 as 58%.
8. Number of leaf was 52∼67% compared with 1989. Kearyangppong was the lowest as 52%, the highest Jamsang 21 as 67%.
9. Young shoot and leaf weight was 44∼63%, and leaf weight was 39~61% compared with 1989. Kaeryangppong was the lowest, lowest, Jamsang 21 was the highest, Cheongilppong was similar with Kaeryangppong and Jamsang 22 was similar with Jamsang 21.
10. Rate of young shoot and leaf weight to total weight decreased from 75% in 1989 to 55∼61% in 1990. Rate of leaf weight to young shoot decreased from 72∼82% to 67~71%, showed 5∼10% decrcase.
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KEYWORD
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