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우리나라에서의 임목육종에 (林木育種) 의한 생산성 증가
류장발,심상영 ( Jang Bal Ryu,Sang Yung Shim ) 한국산림과학회 1988 한국산림과학회지 Vol.77 No.4
Improvement of productivity by forest tree breeding work in Korea was estimated for a few important tree species. Progenies of 17 plus trees of red pine (Pines densiflora) outgrew by 57 percentage compared with progenies of unselected trees at age 15. If best three families are selected among the 17, more than double in volume grow-th is expected. The hybrid Pinus rigida × P. taeda showed more than double volume growth compare to P. rigida at a southern plantation at age 15. However, the superiority of the hybrid decreased at northern plantations, mainly because of low coldhardiness of the hybrid. At a northern plantation, the hybrid grew less than the P. rigida on upper hill, while the hybrid grew much better than the P. rigida on flat area. Another hybrid Populus alba × P. glandulosa grew faster than both parents by two to two and half times according to planting sites at age 10. Introduction of Pinus rigida also showed increased volume growth. Volume increase by selection of best five provenances among 45 at age 12 was estimated as 53 percent compare to progenies of plus trees in Korea, Additional 19 percent of volume increase was expected by selection of the best families within the best provenances. Annual production of chestnuts reached about 70,000 M/T by planting resistant clones to chestnut gall wasp (Dryocosmus kuriphilus), which killed almost all susceptible trees. Although polyploid trees and mutants have been produced by colchicine treatments in over 10 tree species, none of them is economically important Remarkable improvement of productivity is expected by biotechnology in future through selection, hybridization, introduction of foreign genes at cell, cell organelle and gene level, and gene transformation. At present, mass propagation of superior planting materials by tissue culture will increase the productivity.
침엽의 수지구 (樹脂溝) 위치에 의한 우리나라 소나무의 이입교잡현상 (移入交雜現象) 연구
류장발,홍성호,정헌관 ( Jang Bal Ryu,Sung Ho Hong,Hun Gwan Chung ) 한국산림과학회 1985 한국산림과학회지 Vol.69 No.1
Introgressive hybridization of Pinus densiflora in Korea was investigated by examining the position of resin ducts in 4,992 trees from 67 populations. Judging that P. densiflora has only external resin ducts, P. thunbergii only medial resin ducts, and any tree which has even one needle with external and medial resin ducts is hybrid, hybrids are found at all populations investigated. As variation in position of resin ducts was found among needles on a tree, the number of needles investigated from a tree affects judgment of the tree`s hybridity. Therefore, hybridity seems to be judged by many traits rather than by the single trait, position of resin ducts. Seed production by artificial pollination between P. densiflora and P. thunbergii was very poor, i.e. one full seed from five female flowers or from two mature cones. This poor seed production, in addition to the low hybrid vigor, if any, seems to make the artificial pollination between the two species for mass-production of seeds for planting impractical.
류장발(Jang-bal Ryu),배재수(Je-soo Bae),장정원(Jung-won Jang) 한국양봉학회 2007 韓國養蜂學會誌 Vol.22 No.1
Honey producing counties in 4 major geographic books during Chosun dynasty. 166 counties out of total 334 counties produced honey in [Sejongsilockjiriji](published in 1454). 170 counties out of total 331 counties produced honey in [Sinjeung Donggukyeojisengram](published in 1532), 134 counties (data from 46 counties are missing) out of total 333 counties produced honey in [Yeojidoseo]([(published in 1766), 174 counties out of total 335 counties produced honey in [Daedonggigi](published in 1866). Considering data from 46 countes are missing in in [Yeojidoseo], nearry half of counties produced honey in 4 major geographic books during Chosun dynasty.