tailieunhanh - Báo cáo khoa học: "Effect of vegetative propagation on field performance up to age 8 of hybrid larch (Larix x eurolepis) clones"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài:"Effect of vegetative propagation on field performance up to age 8 of hybrid larch (Larix x eurolepis) clones. | 469 Ann Sci For 1991 48 469-482 Elsevier INRA Original article Effect of vegetative propagation on field performance up to age 8 of hybrid larch Larixx eurolepis clones LE Pâques D Cornu INRA Station d amelioration des arbres forestiers centre de recherche d Orteans F-45160 Ardon France Received 15 November 1990 accepted 15 March 1991 Summary More than 100 clones of hybrid larch Larix X eurolepis have been vegetatively propagated by stem cuttings and their behaviour under field conditions been examined in 2 clonal tests up to age 8 and 10 yr. Rooting rate was high 87 but very variable from clone to clone. Transfer of rooted cuttings from greenhouse to the nursery remained a serious problem. No correlation between octet vigour total height at age 2 yr and rooting ability could be found. Rooted cuttings behaved mostly like seedlings for both growth traits and stem form at least when taken from young ortets 2 yr old . Age 2 compared to 16 yr of donor plants seemed to have long-lasting effects up to age 10 yr on further growth of ramets. The genetic composition evolution of a fictive multiclonal variety was simulated up to age 8 yr. No major change in the representation of the component clones could be observed. Larix X eurolepis I vegetative propagation I stem cutting I clonal test I hybrid larch Resume Comportement en foret à 8 ans de clones de mélèze hybride Larix X eurolepis multiplies par voie vegetative. Une centaine de clones experience 1 et 21 autres clones experience 2 de meteze hydride ont été multiplies végétativement par bouturage horticole et installs à Eclache Puy-de-Dôme et à Peyrat-Le-Château Haute-Vienne . Le comportement des clones en foret à 8 ans et 10 ans pour experience 2 a été étudié de manière à verifier 1 intérêt de la vole donate et en particulter te bten-fonde de certaines critiques formutees à I encontre de la multiplication vegetative. II ressort de cette étude que - te taux d enracinement global est étevé 87 mais varte notabtement de clone