Nghiên cứu một số đặc điểm tái sinh của thảm thực vật rừng sau cháy tại huyện hòa vang thành phố đà nẵng

i /Ӡ,&$0Ĉ2$1 7{LFDPÿRDQÿk\OjF{QJWUuQKQJKLrQ &iFVӕOLӋXNӃWTXҧQrXWURQJOXұQYă WURQJEҩWNǤF{QJWUuQKQjRNKiF 7iFJLҧ Trҫ n Thӏ7KX7Kѭ ii NGHIÊN CӬU MӜT SӔĈҺ&Ĉ, ӆM TÁI SINH CӪA THҦM THӴC VҰT RӮNG SAU CHÁY TҤI HUYӊN HÒA VANG, THÀNH PHӔĈ¬1 ҸNG Ngành: Sinh thái hӑc Hӑtên hӑ c viên: Trҫ Q7KL7KX7Kѭ 1Jѭ ӡLKѭ ӟng dү n khoa hӑc: TS Phҥ m ThӏKim Thoa &ѫV ӣÿjRW ҥ RĈ ҥ i hӑF6ѭSK ҥ PĈj1 ҹ ng Tóm tҳ t: KӃ t quҧnghiên cӭu thҧ m thӵc vұ t rӯng tҥ i nhӳng khu vӵc rӯQJÿm[ ҧ y cháy tҥ i huyӋ n Hòa 9DQJÿmFK Ӎrõ rӯQJVDXFKi\WiLVLQKWѭѫQJÿ ӕ i tӕ WQKѭ ng sӵÿDG ҥ ng vӅthành phҫ QORjLÿmE ӏҧ nh Kѭ ӣng Xuҩ t hiӋ n nhӳng loài tái sinh sau cháy vӟi mұ Wÿ ӝGDRÿ ӝng tӯ17.787 cây/ha ÿ Ӄ n 27.480 cây/ha Sӕloài tái sinh ӣkhu vӵc cháy giҧ m tӯÿ Ӄ n loài so vӟi rӯng khơng cháy Có 81,4% 86,2% tái sinh có chҩ WOѭ ӧng tӕt khơng có tái sinh có chҩ WOѭ ӧng xҩ u TӍlӋcây tái sinh tӯ hҥ t chiӃ m chӫyӃ u (92,5% - 95,9%) Các loài bө i, thҧ PWѭѫLSKiWWUL Ӈ n nhӳng khu vӵc rӯng bӏ FKi\ÿ Ӆ u nhӳQJORjLFyÿ һ FÿL Ӈ PѭDViQJYjSKiWWUL Ӈ n mҥ nh ӣQѫ Lÿ ҩ t trӕ ng Ngồi ra, tính chҩ t cӫa ÿ ҩ t rӯQJVDXFKi\ÿmE ӏbiӃ Qÿ әi tiêu cӵFGѭ ӟLWiFÿ ӝ ng cӫ a cháy rӯng Cҫ n có nhӳng biӋ n pháp tích cӵc giúp phөc hӗ i thҧ m thӵc vұ t rӯng sau cháy Tͳkhóa: (cháy rӯng, tái sinh, mұ Wÿ ӝÿ ҩ t rӯng sau cháy, thҧ m thӵc vұ t rӯng) ;iFQKұQFӫDJLiRYLrQKѭӟQJGүQ 1JѭӡLWKӵFKLӋQÿӅWj TS Phҥ m ThӏKim Thoa Trҫ Q7KL7KX7Kѭ iii RESEARCH SOME CHARACTERISTICS REGENERATION OF PLANTS FOREST AFTER FIRE IN HOA VANG DISTRICT, DA NANG CITY Major: Ecology Full name of Master student: Tran Thi Thu Thu Supervisors: PhD Pham Thi Kim Thoa Training institution: Da Nang University of Education Abstract: The results of the study on plants forest in forest areas in Hoa Vang district showed that the forest after fire was regenerate quite quickly but the diversity of species composition was affected In particularly, there are some kinds of after-fire regenerated trees which appear in densities ranging from 17.787 trees / to 27.480 trees / The number of regenerated tree species in the fire forest area was decreased respectively from to species comparing with the non-fire forest There were about 81,4% - 86,2% of good quality regenerated trees and there were no bad quality ones Besides, the rate of regenerated seedlings from primary seed accounts from 92,5% to 95,5% Bushes, fresh mats that grow on burned areas are all light-sensitive and thriving species in the bare land In addition, the nature of the forest after burning has been negatively affected by the fire Therefore, positive measures should be taken to help restore plants forest cover after fire Key words: (forest fire, regeneration, density, forest land after fire, plants forest) 6XSHUYLRU¶V confirmation Student PhD Pham Thi Kim Thoa Tran Thi Thu Thu iv 0Ө&/Ө& 75$1*3+Ө%Ỵ$ /Ӡ,&$0Ĉ2$1 i TRANG TÓ07Ҳ7 ii 0Ө&/Ө& iv '$1+0Ө&&È&7Ӯ9,ӂ77Ҳ7 vii '$1+0Ө&&È&%Ҧ1* viii '$1+0Ө&&È&+Ỵ1+ x 0ӢĈҪ8 7tQKFҩSWKLӃWFӫDÿӅWjL 0өFWLrXQJKLrQFӭX ĈӕLWѭӧQJYjSKҥP YLQJKLrQFӭX 3KѭѫQJSKiSQJKLrQFӭX éQJKƭDNKRDKӑFYjWKӵFWLӉQFӫDÿ &ҩXWU~FFӫDOXұQYăQ &+ѬѪ1*7Ә1*4 8$19Ҩ1Ĉӄ1*+,Ç1&Ӭ8 0Ӝ76Ӕ.+È,1,ӊ0/,Ç148$1 1.1.1 Thҧ m thӵc vұ t 1.1.2 Khái niӋ m rӯng 1.1.3 Tái sinh rӯng 7Ә1*48$19Ҩ1Ĉӄ1*+,Ç1&Ӭ875Ç17+ 1.2.1 Trên thӃgiӟi 1.2.2 Nhӳng nghiên cӭu ӣViӋ t Nam 1.2.3 Nhӳng nghiên cӭu vӅtái sinh rӯng tҥ i huyӋ n Hòa Vang 12  Ĉ,ӄ8 ,ӊ1 7Ӵ - ;­ 1+,Ç1 +,.,1+ 9ơ 7ẻ1+ 7 +ẻ1+ 51*7,+8