a6 f)~1 HOC vA TRUNCHOC CHUVtN NGHltp
TRt1'iJ'NG B~I HQC TONC RQ'P TP. Db CHI MINH
~
c Au QUANGHI~N
MOT' SO
DAC
.
~
DIEM
I .
SINHTHAI HOC RUNGTRE LO6
(Bambusa procera A. Chev. et A. Cam.)
'-A "'- A
MIIN DONG NAN I'Q
Chovan ngonh: SINH THAI - Me IE;t 01 . 05 -10
TOM TAT LU!N AN PHQ utN 51 KHOA HQC
-" '-' ' ._\
r~\~\i\-\/,:.J('.' ; ~\!~ \~
! , . . ~ " I \ l-
I THUii':"j",C ~II.~L,r
\ . - . ~".j
! > " \
\~,~
tH.i.NH PH6 HO CHr MINH
1987
luOn an dirge holm thanh IQi B9 men Sinh moi, Khoa Sinh h9C
Tnrbng 9Qi hQcTOngHgp Thanh ph6 Hd Chf Minh.
NgU'c7ihU'ang do, khoa hQe; G 5 T5 PnUNG TRUNG NGAN
NgU'bi nh9n xet I:
Ngll'ai nh9n xet 2:
Ca quan nh9n xet:

b~f gi6y fir lo 0 (Chou CY'Xu, 1964; Nguy~n YOn Hlen, 1973)
k9 thu(ltlam sinh (ly ThQ, 1979; lam Xuan Sanh va Chou Quang
Hi~n; 19d4)
. . va ch"a co tong lrinh nao khoo lal khfo cQnh
.inhlh6i h9C cuo rCr"g. .
NnJn chllng, cae k~t qua hi.n co con fU'ang d6i sa 1U'(jJcVO
to nhi~u di~m chU'a th6n9 nh~t nhou nhU' xac dinh ten khoa
t;9c, ki~u sinh "U'CIn9cua lo 0, cae (hi tieu k9 Ihu{ll cuo phU'ang
thCrech{Jt cl,Qn '" dOng thoi con nhieu vaQ d~ co bon co y
-2-
nghta quon frQng ct6i vai vi~c sUodvng hgp Iy lai nguyen rllng
lO
0 nhu d{1c di ~m hinh Ihanh, dien fhe, sinh kh6i, nOng suet
rllng chua dugc khoo, s6t.
Ke thlro cac ket quo da dQf dugc trong c6c nghien CIlU
truae day, mi,leHell cua lu?m qn, nay la du-(j'igoe dQ sinh thai
hQC,ti~p tve di§u
ha thY'C Ie g6p phan khao sat mQtso d{1c
dit\m sinh thai hQe cua fling ,Lo 0 mien' Gong Nom BQ la~ co
sa khaQ hQCtho v!~c de xual phlfo;lghuang,khoi th6c va nljOj
ClU'angrl/ng mC}teach hgp Iy hon.
'. ,.~ ~ "
Chuang 2: NQI DUNG VA PHUONG PHAp NGHIEN CI1U
I'~' NQ1' DUNG' N,GHIEN CI1U: '
Can ell vaa myc tieu eua lu{m 6n va cae chi dan cuo
UNESCO, UNDP, FAO, 1978 ve nghien CIlUh~ sinh thai rllng
nhi~t d6i vaa dieu ki~n cv th~ (UOflIng Lo 0, cac n{li dung
chinh duge l{tp trung. khco sol Irong ju{tn an nay la cae c{1c
diim hin'h th'anh, dieMIl1e, sinh Iruang tau Irue quar1 thi, uac
tfnh sinh kh6i va nOMa suat cuo qUaM thi to 0 trang dieu

caekhu Vl/Cphon b6 chinh cuo Lo 0' mien &ong Nom 89; Phu6c
Long (560g Be), Vlnh An (&on9 Nol) IU- 1980- 198:>va eJieu
tra bO sung tQI Nom Cal Tien (&ong Noi) tu- 1980 - 1987.
&6i tl/gog va phQm vi, khao sat 16 cae qUaD Ih6 Lo 0 a
cae trQng thai rung ma Lo 0 chiem I/Uthe (0 r~t 1rong to thanh
rtlng -10 cae khu Vl/Cdang kinh doanh J<Jnphbm chinh 10 Lo
0- boo 90m IrQng Iha. ru-ng Lo 0 10 gia " (nhll cac trQng Ihal
r!)ong La 0 xeD go, Lo 0 thuon 10QI, hinh thanh Itl lau dong
phat tri6n dn dinh, chuo bj con ngllai liep lye tat d9ng) ,va cae
tr~mg thai rllng Lo 0 "phvc h6i '0 sou khi bj khoi thoe trtmo
hoQe lam ray dang a cae giai do,:," phye hoi khae nhou IIi I
den I nOm. Tuy nh!en, d6 11mhieu ve nguon g6e phat sinh rOn;, ,
dQc dl6m taU Irue va tai sinh cuo cae Ir Cong Ihai ru-ng go
nguyen sinh (dl~m Lo0), ru-ng go xen Lo 0 eOng da dll9c
khao sat. . .
V6i Illng n9i dung, da ap dvng cae:phuong phop thu IhOp
i6 li,u Ihkh hqp;
- - Qo.o tdnh dieD the d<;tcdl6m eau Iruc q\J~n xa rung,
ea",tru, quan th~ Lo 0 da dugc dieu tro Iren 54 0 lieu 'chu{1O
(O,lho) theo phuong phap 0 lieu chubn (XUCOSOVIv. N, 1957;
Thai Van Trung, 1970) ket hgp v6i phuong ph6p ve bi~u do
phau di~n (DavIs, T. A. W va Richards, P. W, 1933 - 1934).
- Hinh Ihoi vo .sinh Irvo-ng cua Ihan ngam, mOog, thon
: 4-
khi sinh, hOd U> 0 dU',?,ekhao sat va me ta (theo Ueda,-K,
1960; Le Nguy&n, 1971; Tran a(re HQu, 1985) bang each :d'c2o
goe than ngam, rhea dCii $1/ sinh
mOng trong suot mu~ mU'o
nam 1982. .
- Sinh khoi va nOng suet fling dU'gc thu th{lp theo phU'ang

'"i6 ThQi Van Trling X
= 4.2. I), Iren nen d6t ,feralit n6u do
no,u ,vang fren do bazan, feralit xam Yang, vang do tren phien
thQch.la cae 10Qidat co fang d61 sau
(> 60 em),' Ih06tthuy
; ~6t, khong ng9P veo mua mlla.
Cae quan sat thl[C Ie eho thay va phon be, co 51[ phon
hoa ro r~t glO'a La 0 va Tre Gai (Bambusa orundinaeea willd)
cOng la m9' loai Tre quan IrQng
a mien &5ng Nom' 69: ,Tre
Gainlhuang Xval lii~n a nai thap, dOl b&ngven song su6i, d6t
.xom trim granit thllong bj ng9P lap xap vao mug mllO. SI!
khat bi~, ve yeu cau sinh thai nay can dU'<}cehll
y Irong qui
hoQeh vung ehuyen eanh cho m6i loai. '
Cae dieu ki~r1 sinh thai nau fren chi mal eho Ihoy 'dQe di~m
cOG khu vl{c mo Lo 6 co kho nang xam chie" va !no rc}ng di,n
tich/la tien de can ,hie! -IlhU'ng thtra du gioi thie, 51{plio!" 5i'nh
,mc}t di~n tieh rCrng Lo 0 bQt ngan n;,ll hi~nIQi. Hori 'nO'a' th'r,~h
'ling vOi dieu kl~n$inh thai -nau Iren, thom Ihl/'- Y91r~rig nguyen
sinh a day' 'do /0 rlrng dm thvong 'xa'nh mva mu~ nhi~t"dal
.v6'i SVI1Uthe'cua looi cay go hQDau (Dipteroearpac'eae",rihU' DCiu
,.J6 bong (Dipterecorpus t,vrbinotus Gaertri.l, Saoden (Hopeo
:'Qdorato Roxb.) a fang vuql ,einh~n gluo v6i cae loai-khai;;~hU'
,H'uynh ITarrietia ;aYOniCa 81.) Cay Jrvingia maJoycino Oliv~),
Lirn50ng (P ltophoru:n da5yrachis KUiZ), xen Ian m9t It 1001
'Jyng fa mua kh9 nhU' 6ang Lang (Lagersfroemia' sp.) '.
'trongdo,o 51{hi~n d'4n ,uo to 6 du6i Ian rCrng nhU'ng
,phon b6 roi la"'56ng "khiem 16n"ya voi tro hau nhv kh6ng
; d6ngke. KIC~urllog nguyeri sinh noy hi~n fQi con hi~n di;.n

Khao sat lap cay tai sinh a cae: trc;angthai rClng nay cho
th6y khi cay go con U'u the- so vai Lo - 0 (rung g& xen Lo~O)
,thl lap cay go tai sinhphong phu (2800cay (> Im)I he) thu9c
cae loai :Dau la bong, Go mQt, Binh linh; B~ng lang, Cay,
Tram, TrU'ang,Long moog, BCra.Co k6 ' co kha n6ng chan)
IQi fifth trQng va tan va tiep fve giO'vai fro U'u the d6i vaiLo-o
NhU'ng khi Lo- 0 da giD' vai Iro U'u the (rling L~- 0 xen g6'
. ,
fling La. 0 thubn 109i) lap cay gO tei sinh it hoi)etrung binh
'tit 00
- 1600 cay> Im/haJ phbn Ian IhU9C c6c loQi g6 nhe I
long mang, Co ke, Thanh ngQnh, Long ,mCre,56 ". nen tri."
v9ng phyc hai loi 51f U'Uthe cua cay go ta di~u kho co th~
xay ra.
Qua tdnh hinh thanh rling La. 0 Iii g6 thee hU'l1ng Lb. &
hoa flIng g6 nay ch6c ch6n to qua trinh tau dai, c6 5V cQnh
tronh d~ gianh U'uthe tling IUt,t,,"S ngi tUOcay g6 hQ9C La .'Q.
"'~~-'7-
2) R\rhglb. 0 hinh thanhtren dat visn 10 euar&ng lb;, 0&
Sou khi hin; thanh tll fling go. cae trQ'Igthai rl1ngLo-0 (Lo-o
.en go~ L) -6 tnuchl 10Qi ) IQi tiep t c bi toe dgng bol eon!
ngU'ai: pbarl1J1g Lcho lam ray, khai t~hQc,rang,L9~ 0 $au khi;
bi tac d9ri9, do khlJ "nang lai sinh vB tj~h monh mi§,than ngam'
Lo- 0 van liep t c dam choi sinh mans hinh thanh . cae trQng
thai r\rng Lo- 0 "ph e hoi" sou ray, sou khoi thae trang. "
\ r\rngphve hoi, vai!ro U'u thecu-a Lo';"0 doi .vai cay go tang
'r~r,t vi lap cay 96 lai sinh 0 day kern phong' ph" va eh'-
y6u van Ii] cae cay go nho (long mllc, Co ke, Thanh ngonh)
thCrsinh mQcx.n vai Lo. 0, .
So v&i qua trinh hinta thanh r\rng Lo. 0 l\r rl1ng g6 nguyen

I liJNH THAI I .
, ,
, ' Ket quo ph8n tich cae mau than ngbm, than khi $:in~,16,
hoa~ LO0, thu th9P a PhU'acBinh, Dakta, Bu ,Gla M9P~ Vtnh
.','An,' Nom C~t Tiencho th6y lb 0 d6i tU'gngkhbo sat eua lu9n
, an nay c6 cae dQc di~m sou day: , ' ,
Than ngem mQc eym, krch thU'aG coo 13- 15m, dU'ang kinh
7 - IOem, khong gai, 16ng bQng, vach moog, tQi b, la C«Silong
:~ trllng dai, mo Dang co toi khans phat tri~n,gie boa hinh'ov~1
, I)hQn d~p mang 5 - 7 hoa tfmtrong do co3 4hoa thy', e6 lei
nhO'ngdQc trU'ngcua loai BambuM procera A. (her ,et A. Cdin,
da dU'gcLecomte H 1913 vaPhQm hoang H9, 1972 mo la, Cac
d{lc tning nay khac ro r~t (n"61 la hoo) vat loci Schizosta6h-
. gum idllingeri Steud cung c6 ten dia phU'ang 10 Lb0 Igi~ho,a
hinh try, manh, I hoc Thy), ' .
II SINHTRUONG:
I) &Qc'diim sinh mang:
" .",. Si:nhfru'c,Ilg.cliathanngtlm: Than ngum lb &sinh trU'ang
,thee ki~u;hqp' trye va than ngam mai dU'ge sinh to chu yeu tl>'
"Jhan ngem cay'm~ I n6m tubi. Net d91 s6c eua than ngamLo a
'1'0co' kIth thirae kha dai (50.80em), dam hoi nghitng xuong d6t
trU'flakhi cong liD ra khoi d6t Ihanh mOng(gan gi6ng nh" loCal
,Melocanllab(!-lnbusoidesTrin, a An d9, do d6 Cae than khl sinh
trong bVLLIS,0 khong mQcsat vao nhau nin chU'a thay xoy ra
:-hi,n tU'gf1g<nang bVi), eay la Iqi d,~m coo,L6,0 v~ mQtkinh,
doanh r~ng,
- ani'ng Lo6 «ria) : Than ngem co sinh trU'ang- 60 djith,
-m~i Ihonngem m~ ,inh ra 4 - 5 than nge,m mai trong dti c6 I
,than ngem mai e6 kith fh.,,6'c w'ong dU'ang than ngem m~
" 'd c::::4.5. em) ph~t trieDthanhthan, khilinh '&oikhLc6 hi;n

>. Mud lniing ~ Mua xvat hi~n mOng to 0 ke~ daH!) dbo' . ,.,
'hang 6 den 'cu6i thong 9 khbp v6imua mu'a fQFdaYltrong',dd,
cd th~',.phon:'bi;t vy sbm'(thang 6) 'vv mu9n(thang9).~a'-vy,
~hfnhFhang 7- 8). M6ngVIIchinn(55~75%) phbn Ian la;mOni
.6ng) ~oi'i t~ pnat Iri6n Ihanh thon khi iinh cootrongkhimOng- ',,'
vy sam va y miJ9n mQc roirac va IhU'ang bj itthui) (dl"
-'Flingltu:&ngciialllcing: Khi mai xuat 'hI'"'; m~'r;g ~o;,g')
Lo 0 fllOg 1rU'ang ce9m frong>T5,. 20 ngay (2 ~4cni/2,4gia-),iau
' '
, "-'
;
\
\:;
I \.
\
' .
"'-'
.t_
. ~':!"J Q-
d6 "hanh db" (10. 20cm/24gia) va 6n djnhtrong t~~i Oia~dai
"(55 -05 ngay), ~au cung 9 am di r~ fit. Nh" th,,~Ong -nhu tae
,'10ai'Tr8, trucnhift dOi ~hac, thai eian d~ m~n~ l~ 0 .sinh
. 'li'\farig hoan bl v~ kic.hthtrac 10 80. 100 ngay,
Do Iinh trU'angtheo ki6u hQp trye:
" -,Gllta c8ym, va mang L~ 0 I~n tQI m6i qua" h, ch9t
c:h~,,~ krch thU'bca diy me c6'dU'ang. kfrh Ian (7. 8cm) &"dl"h
,al sjnhmang c6 c6p kinhlan tU'ang dU'ang, 116i IQi,cOY
m,
,c6c6pkinh Mho (I .2~rn)sa sinh mane co o~p -1dnhnho(2. 4cift)
16~ han c8y m9 ~hut h d. dong frong q!Ja tr\nh phve h~t ,

' ,
"-:01
\ ' ' \ -~~H
l
i
'1("\ I .
'. )!. \ . '. .
~~~ \hi.n' f",ng ".6ng "'ulb n)ngphvc h~1lau khat fh6c frtlng7
iMam cho th~y mans vy U7'1'1va mllQn COIf I, Ihui \80.90%)
_Jcao han nhieu so vbi mans vv cl1ln" (10. 20%~ MCfang"onl1 bi
thui 100%. mOng cO 95% trong khi'tf ,+ nay it han among ong
.(35%). Nguyen nhan dan d~nh:,n fU'9ng fhui,cua mOn9 10 do
~9ng v{JIrirng (heo rirng va CUI)15%, sou b,nh hoj (b~"h 'nom
"6ng va IOUdvc man;) 30% va coc .nguyen nhon ~h6e: !cQnh
tranh d,nh C"~f'g va khong Sic n song) 55%.
'
Nh9,djnh chung v~ d{lc diem sinh mang cva to 0,1 0 'kcf':
- Dc si~h Ir\lOn9 Iheo ki~u h9P ""1e:Me" kith !hllat manS
co quaM h~ mQt ,'hi'. '<iaicay m, tubi I vt\ co cay hJ~j 2 trong
'vi;t cung cap ch6t dtnh dU'a-n" nuoi mOngo ,',
. - M6it"ang qua" nghithgirta56'U'9';9.;6,klChthu-aemOlig
tho'th6y kh6 nang xam chiem va ph c hbi !6 hrqng mQnh .m8
tUa Lo
0 tr~ng d'~u kit" quong tr6ng, khonang nay glom cbn
va co thiq hQ" ch' trO"9 di~u kj~n byi pho'f trier) cay dQ~
(hiin iU'9ng ngirng sinh fa\Ian g) .
- 'Kha nO<)gsinh t'\lang mQnhm8 coo mang «6ng) l~ 0
chI trongmQt muo n1U'a16d5 hogn b; v~ kith t~.U'ai:la diem
d~~is6c d~nden 11'0ngst.6t coo coa qu~n th6 nh\l sl phon tfch
~ phbn seu "

va IV ph6t :triin tUg 'dig ylr~ntha-n chinh".$V phatttiin c~nh .
va II[ ton tQi cuo mo non" to co. ih~ xay dY'",rdU'.Q'c bang xac
djrih tudithan khr~in~ Lo 0 thee kinh thai ben ngaai phyc vy
tho vi,c ch9n du~EI ~6i 'tU'gng, khl khoi thac: , n "
- Tuoi 1: Than" m'oUxonh 'lU'oi, phulap ph6n saptr6ng,
CthU'ocodiay,' con. mo ncng. ' .
-, Tuoi 2:Than mau xanh tham,' djan ylac dae gan g6c
(5. 10%) mang;'nhi~u can't, nhe, dQc than, khans c~nm. nang.
Tuoi;J! Than mau'~onh. thdm, loang lod6m Jr6ng xam 'CUQ
dig y (30.50%), khong con mo nong. .,'
Tu13i4va ,?-4: Than mau xamtr6ng do IVphat tnin
day dQc eu,adio Y(~o. 130%),pl1QnVOlhanl9Jaco ma", xonh
tham ho{lc c:;huy~n sangvan~, khong'con.mo' ncJOg~
2) Tu6i thanh thvc va mvc ho~a: ,
- Tudi thanh thvc toi sinh cuo Lo 0 10t.uOil': mane Lo0'
dU'Q'csinh ch\J yeutlr than ngem cpymt; I nOm tuOi. "
- TuOi thanh thvc cons ngh, cuo Lo 6 10 'ubi 3: Lo 0 tu6i
3.4 thlch hQ'p nhch cho vi~c che, bIen b9f ,gioy va cae (On,9
4vng khdc ' , ,',,' '
A" ' ,
, -Tu6i, thQ cuo LoO tU'ang d6i ng6n : a to6i 5c6 hitn
tU'Q'ngnga vans batdau 'co nhifng vet myc va Ian fato~n than
lam cho than khi $inh mv(;.va chet kho trongrO'ng vod lObi 6.
" .( ! : "
3JI(ETCAUTUOI: "", " "
(; (O'n910 6 «gia', tll~ cay thorih thvcc6ns- ngh~ C;i!>3
-~~:3-
tu~i) la 59,1% ,cao ban cay non (40,9%), so h,qng cay chel
mlJcb&ngho9c cao ban c:hutit so vai 1U'91".9mong 6iMhr-ohcmg
, r"am~Tr6iIQj~a rllng Lo6 «phvc:hOi»;IfI~ c'oy'nonthU'angcoo

Ihrch hgp. aU'ong krnh binh quan cue thon khf sinh tiep tvc tOng
Irong giai doc;m nay nhO'ng vai loc
a9 ch{1mhaD va aQIIQi Ir;
so-nhU' FlIng gia (7cm) sou 8. 10 nam phvc hoi.
=-\1:4~
,- . . '
, .4 ' . ,
Oru-ngL~ 0, phVC:hoi theo'ray,: qua tririhphvchor~9
49'vadU'ang kfnh 'tU'ong tv nhU'sau khdi Jt\ac trang vart6c'49
phvc hoi dU'angkinh chgm hart (1;4c'infnamthCrnhat 3,7cmlti~m
thCr'to" 4,8cMfntirrither bay ,) v~ cap kinh 6n djnh chr~9t
khoang5.6cm 'thap han rllng Lo0 cgich do'datbj thoaihoa.
Trai' IQi,m~t dQ a ,tllhg'to 9'phIJC hoi sou:tOy cao hOri-$,ou
'khai that tiling 10- 20cy~~ dlh~mQt thai gi~n phvc hoi. . , '
, 6 co 2 trQng thai ru-ngphvc hoi, sl{ ph6n ,b6 s6coy thee
cap kfnh, 10 $'1 phonbo bat ~~ixCrng vai~day 'pho,n be$.6.7
cap kfnh va, i~(,.h ve phie trai cho thay "jnh chat chU'a 6n djnh
cua quan Ihi. Sou 6.7 nOm ph , hoi, don don quan Ih~ s! co
,.
sl{ phon bo chuah 5 cap kinh 6n djnh nhlt riing,Lo agio:
I . ,'" , ."
, Nh{Jndjnh chung ye ket cau m91d9 va dU'angkinhquan
thi La 6 cho: t.hoy ,q co 2 tr(lng thai n)n,g ~Q 6 cgia) Va phQC
hoi deu co mouthuon: ru-ng Lo6 «g,O)co kith thU'accoy To
(7.8enl) nhU'ng s~ 1U'C;mg,~an~ m6i sinh ,hang nOm kern do II{
khongche eua cac coy qua thanh Ihvc, hi~n dl~n Irong quan
the.Trai IQ'irk~'ai,thac 'rang hoc;.c lam r.fJylhi'kfcn'thich "$\1'sinh
'mang, nhU'ng Id-m
giarn n9hiem trQng kich IhU'acthan khi s'inh.
Gi,aj quyet 'mau 1huonnay bang c6Ch tQo'ra m9t ket taU' hqp

true rieng khat hon voi r\Tnggo trong do c6 Ih~xem10h'Q'ng
'diy voi dU'ang kinh rieng a mOi cap lubi 10 mQt cphon tlr
r&ng e6 chCre nOng khae nhau d6i veri qua trinh phat triftn
c\la Jl)ng va qua trinh nay (co a IrCjlng thai FlIng cgia) va
phye hoi) 10 qua trinh «doi mal) r\Tng hang nOm bang each
thay the (,ae phon IIi rung cgia eoj) bang coe; phon Iii rung
coon) theo hinh IhCre«191
xac» dan.
- " r"ng Lb 0 cgia). qua Irinhdbi m6"ivbn duy tri t6u
true bn ~inh cua rCrng,frai ICjli C rCrng phyc hOt quo tlinh dOi
m6'idiAn ,a theo xu hU'ongfang don kith thU'oe binh quan,
tang nhanh sou do glom dan m9t dQ, thuyltn t" sv U'uthe cua
cay fobi non sang coy thanh thyc, nghTa Ia tien don den trCjlng
thai 6n d;nh nhll r\TngLo 0 cgia).
Chtrang 61 SINH KH61 vA. NANG SUAT
,
I. SINH KHOla
I ) Tr9ng 11I9ngkho c6 th~ L~ 0: T'909 1119"0'e6 th~
to 0 bien ,hlen theo tubi Ian dU'ang kin" than khi sinh tl)
I,2kg Ilubi I / cap kinh I den 22,5kg I tuoi 3 / cop kinh IX.
Theo lu6i, is c.ungm9t cop kinh, trqng 11I9n9thop nh6t a tu~i ,
tOng "hanh len tu6i2, tang t.hl)m den tu6i 3 va bn dinh C
cae tu6i t.oo han con Iheo dU'ang kinh, a eung m9t tubi, 16c
d9 lOngtf9ng 11I9n9c6 fh~Cangnhanh khi dllcng kfnh congIon.
, ~".;.:16:r-
.'
~"S'l
R,bAnb6 Ii I~ eae.bQ'pJiQn trone, ftQng' 't,u9Rg,~c~ th~
nhU' ~QUi t~~n~hisinh,(4Q77(}%kcQtih'(lo.~2j%)"I'a' (,1Q 20,%).
~>Th~,r!n9Am 0.0. 15%l,lrOl)g ,,($.9JhO!1 khfsioh va than 'Ul~m it

'~dn9 10Ru'o'JrjT\O'phVC hoj sinhkhoi c~o qu~nlh~ too :',IQng
'sinh kh6i.q~an Ihe Lo 0 long IIhqnh Ih8,O cae 110mphvc.:hoi tv
:n'Om.IhU"nh6tl,O,59 tpn/hQ'den n.am IhU't\J 62,83tori/ho ,sau
do lOng
chQroban ,do m9,td9 9iom~an (71j50 t.6n/hp/nOm,thU'
nom,l9,37 t6nl hoI nom tr.U'lJay,., vo On,djnha Jrj ,~ 80~,.85
f~,nIh;;zx~p xill1ft9 Lo.0 <giO), 11J~ InaQ khJIlnhtrQFI~rt6'1)9
~1:7
sinh'khcSi they dOi theo nOm phyc hoi fir 46,8%I nOm:t11(,nhat
d6n63%1 nOmthCrboy treng do tir nOmther IV ha di m&,b6t
dCiuco cay du tleu chuan khoi thac. Sinh kh6i kho thac tOng
d.ltn.vao cae nOm sou: 15,79 tan
/ ho I nOm thIS nOm; 21,45
ton1 he nOm Ihli boy ohU'ng van con, thap hc," nhiEh;lo\lai rirng
L~0 cgill). 0 .
- Qua Idnh phvc hoi t6n9 sinh kh6i quCin the La 0 phyc
.h~i IOU ray IU'ang tl{ nhU' 0 sou khoi thac Irang nhO'ng.t6c d{)
.ch{1m han \lai IIi s6 6n djnh 65., 70 Ian / ho sou 7.01000(11 phvc
hbi. 11I~ sinh kh6i kho thae trim 'Jnh kh6i than khi sinh kem
vo chI sou 6 nOm (32,7%) mal co th6 dU'o r!)ng Ira IQi. khoi
thac dU'gc. '
Nh{ln dint, chung ve d{Jc diem linh kh6i
quan th6 La 0
tho thay :
-So vai h~ linh thai rlrng mU'o nhi,t dai co t~nglinh
kh6i {phon'lren dot} 290 tan / ha, sinh kh6i quan the La 0 kern
han ro r,t the hl~n qua trinh diAn the thli sinh thoai hoa fIr
rirng go den Ilrng La O.
0"
. - Tuy nhien, do kha nang .inh mOng va ph"e hai mQnh

rCrn9 f199P m~m (9 ton / tlo / nOm) va, tU'ong dU'ong voi cacki,~
'ling tre true nhi~t doi
khae (16.20 tanI hoInOm, Rozanov,
BoG va LM. Rozanovo, 1964).
2) SuotIch IOy va tieu giam sinh kh6i: Hang nOm, 'li rU1lg
, Lo 6 (~ia), sinh kb6i lieu giam do coy ehet mvela 17,39lon/
, "'° InOm, tU'ong dU'ong ho{1e Ion hon chut It 10 va; 1U'9ng~jn~
fa do ,do hi~u quatieh liJy gon nhU' la khong co th9mc,hre6
th6 '0 co s6 am. Tr6i IQI,a fling Lo 6 «ph e hoi), !oan q9
, sinh kh6i cuC! nOm phvc hoi deu lien dU'gctich 10y(10.11 tanl
'&0/0011\) tang nhann 111nOm tn" haj den nom In" tU' (lQ-18
:tanl ha loam) sou do giam fat nhanh va dl va~ the can bb"~
~iO'alinh ro va chiH disau 7 -10 "om phvchoi. Nell hrgng
tieugiomnay dU'9< tho hoQch vaslr-dVng thlse hQnch' i6't
, lonsy- lang phi lai' nguyen va tranh tho tv-ng qua 'tdnh «gl'6
, bqa). "
Philn ba: UNG DQNG
ChlJong 7:
KHAITHAc yANUQI DUONG
" . ' '
I. HlfN TR~NG KHAJ THAcy A NUQI Dl1CNG RUNG
. , -
I )'Khai- thac: Hi~n IQi ferng Lo 6 dang dU'STc'kliaitha~
theo 2 phU'ong Ih", : .
" - Chi;it iding ehi?I't6t co cay !rong bVi Lo 6 saudo IY'~
~ay tudi 2, 3, 4 va d ;? 5cm d~ Slr dvng. PhU'ongthu-cnay co
I1U di~rn la ky thu9t don gian, son IO'9ngtyp frung, vyrrxy6-t
-J9
v9n ehuY6n dA dang nh"ng co khuy6t cfi~m la lam lang phi
toj nguyen rllng : gian cfoQn vi,e kinh doanh lien tye (5 nOm

Ihan khi sinh, xay dvng mQt kef eau m{lt d9 va cfU'ongkinh
hqp Iy dA I{lndvng khOnggian dinh d"ang m9' coc.ht6i "II.
- Xoy dvng mQtket ,au luOih9P Iy, hQn ch~ .,.i+clanG
phi tal ngu) en do'"mvchoc \la cae cay thu hO9Ch11'100 gic,
cfoQnt~t oh6t r.ho cae IcQimye dkh Slrdyne
!!!!!2~
:. ~am bao toembe}tan che t,oi thi6u 'hQIi" <:,,~: sQ'.~tt1o:ai
hoa cua dot trong di~u ki~n 'lung doi nui. . ~,.
" ,,'
,", So yoi yeu CgU,neutr',", cac bi+n phap khai thac vanY9i
duan9jdang ap dvng cbu-aphu hqp n~n di~n ,rclotva c;hathrSmg
r\rngngay cang. co chieu hu-anggiam lut. "
, ','. ~.'~
. ,,'. 2) P~u-ang,thCrck9 thu9t khai thee va nl19idu-ong hqp'li
rtnglo 0:. '
: Phu-q~gthere kbai thee t phU'ang thCrc khai thcie','hkh
tt;gp du-QCde xuat ap dvng doi vaifllng -Lo
6 lach~t,chc;'"ti
rnH'h~t chQnlam sinh) vai do. tU'Qngch{lt la caccay fir toPI'3
tra len(.~ 3 tubi), luan ky khai thac 2 namisanlU'Qng kh<1i
th6c'45.55% trO' IU'Qng~l1ng. PhU'ong there;nay baa dam lay. to
nhiing cay den tubi thanh Ihvc cong ngh~, .chlla IQi cay non
(tupi I, 2) co nhi~m vv nu6i thon ngam '10 ~mh mane v6i :c;"a.!
IO'9ng tal, boo dam duy tri cau Iruc hQp Iy va pn dj"h cu~ rllng
ta m9td9 khoong 6000 cay / ho, cap kfnh blnb quant- Sem,
chi~u coo blnh quan 14-15m, 4 cap IUPitrong do 50% tubi I, ij
5o'%,tuPi 3, 4 va hang nOm rllng dO'Qc bb sung khoang 1500
than khi sinh mai co "hal lU'gng lot. Tinh toon san lU'qng Ihu
hoQch fy thuyetcho thay blnh quan co th~ dQt 15,1 lanjha/nO!11;
" "Vi~ekhaithae cay tuPi 3 tra len con co Y n9hTab60 'If

yiSu bao dam tac sinh ,ling. Thai gian d~ mang sinh trllang d'"
hoan bjkich fhU'ac 10 80- IDa ngay. S6 IU'tI'ngva kith fhU'ac
mtlng co quan h~ ch{lt the vai cay tudi I trong sinhmOng va
cay tubi 2 trong cung CO? chat dinh dU'ong. Rling lo-o gla co
IlIqng mOns thonn than khi sinh thop nhllng -kfch thllac tah
'llang II! cay m~, trai IQi rl1ng phy, hoj ca 56 lU'qngmOng cao
nhllng kich thU'oc nho. Kich thub, nay ph",c hoi dan cho dAM
khi dQf d~n trQng
thai dn dinh sou 7-10 nOm.
3) LO-oro hoa va chet rai rai t~ng bvl hang nOm.
4) Ket qua cuo d9C di~m sinh mung 10 fling ca egu true
rieng va co fhi phan bi~t 2 trQng thai: fling
Lo-ogia va rling
Lo-oph",c hOj:
-Rling Lb.6 gia co m9t d9. kfch thU'ac ~n dinh, -nhU'"9
,6 1U'9ngcay themh thye Ian h()'ncay non Men khang che s6
11I9ngmonS mal sinh hcmg nOm.
- RQ-ngLb-6 phvc hoi sau r6y ho(lc khai thee ,,6ng c6
"'9'"9 mOng sinh coo, kith thU'oc nhi>va co xu hU'ang phyc
hbi IQi trQng thai rling La-0 gia sou 7. 10 nOm.
Co 2 trQng Ihai deu khang phai 10c6u true hqp Iy.
S) Tubi thanh thyc tai sinh cua lo-a: tudi I, 'ubi thanh
thyc cong"gh, : tUdi3, ludifh9: S. 6.
~22-
6} M9C'du 10 tu-ng thl! sinh co sinh kh6f thap (BO-a51Ian/ha)
nhU'ng fu-ng
Lo-aco nOne suat cao (17 -20 tan / he / nOm) do
kha none tai sinh m/;mh me bang can dil(sng vo tlnh.
7) Cae phU'ong thCrek9 thu9t tac "dQng~i~n,tQt ehu:a phu
h9P vai qui Iv{it phat'sinh, phat Ifj~n eua l(rng nen dang lam

Thanh ph6 Ho CM Minh.
/
2. eHAuQUANGHltN, 1992
(!lJu,true va 161i:nh r\rng Ire ~~_6a PhU'&clong 116nSJ").
161ftt6t boo cao Khoo hQc IQiH9i nghjKhea hQcK9thuO)
IbnII.TrU'ang&Qih9CNong Nghifp IVThanhph6 H~CMMinh
3. CHAU QUANG HI~N, 1983
Khoo ,at 10 bO d9C di~m sinh mOng c~a r\rng tre l~-o b
'h,,6'c long ISong 8e). Thong tin Khoo h9C Ky thu91 Lam
Nghiip .6 '13 trong 37.42. Phon Vi,n l~-'!LNghl,p phra
Nom Thanh ph6 H~ Chi Minh.
4. LAMXUANSANH va OHAUQUANG HI~N, 1984
Tr. L~-6.Nha JtU6fban NOng Nghifp -Ha "OJ
5- CHJ.U QUANG HI~N, 1987
eXec minht6n Khooh9CTre l~_oa mi~n&onl Nom If.
'It&ng tin Khoa hQc Ky thu{lt Lam Nghi,p 5623 trang 5.9
PhQnVi'" lam Nghi,p phio Nil'" Thanh ph6 H~ CMMfnh.
r-D~t~: ,'-'; ",; ,
, """", ' : . - ", ,', '<I
I.j':.~' ":=~:.' nY, :
!
\ "" ' ,