regenerarea $i refacerea arboretelor de stejar cu ... - Editura Silvica
regenerarea $i refacerea arboretelor de stejar cu ... - Editura Silvica
regenerarea $i refacerea arboretelor de stejar cu ... - Editura Silvica
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unui sol brun-roqcat <strong>de</strong> pddure. Este puternic inierbat, btrtd,torit, uscat<br />
aproape in perioa<strong>de</strong>le secetoase.<br />
Profilul:<br />
lr:0 -- 10 cnr, brun-ccnuqiu, <strong>cu</strong> hurnus, luto-nisipos, mllos, In!.elenit, sllb glomerulrrr'<br />
Ar/Aa:10<br />
<strong>cu</strong> rtruchii, uscat la data observa[iei.<br />
- 20 cnr. cenu;iu-brun, <strong>cu</strong> pul,in humus, luto-nisipos. trllos, compact. uscat.<br />
Ag : 20 - 30 crn, ccnrr;irr-dcschis, luto-nisipos, mllos, foarte s;irac in humus, <strong>cu</strong> mici cotr-<br />
creliuni fcromangauoase, compact, uscat.<br />
Ar/B : 30 - 40 cnr, mlrunt, I)cstrit, <strong>cu</strong> pete rugirrii 9i cenu;ii nl)icioase. luto-argilos' <strong>cu</strong> llu-<br />
lneroase concreliuni {erornanganoass, t:onlpact, u$or reavilr'<br />
l).: 49 -- 85 crn, brun-ruginiu-<strong>de</strong>scl,is, <strong>cu</strong> pete ruginii-<strong>de</strong>schis, argilos, colnpact, reavllr.<br />
Be : 85 * 190 cm. bmn-negricios. slab ruginiu, <strong>cu</strong> pete ruginii, argilos, compact, reavin.<br />
(1,: sub 190 crn. ca rnai sus, <strong>de</strong> <strong>cu</strong>loare rnai dcsclrisir (rolcatl), <strong>cu</strong> seParalii <strong>de</strong> OOr(.]a.<br />
Pidurea luda, (porliunea Iuda Mare), este aqeza't)6! in zona <strong>de</strong> divagare,<br />
pe o parte joasd,-a conului cle <strong>de</strong>jecfie Dimbovila-Ialomifa' Fa!d,<br />
iie r'eJtut donului- d.e <strong>de</strong>jeclie, aceastd,<br />
-paite apare d"epresionatS,, udat5,<br />
tle Piriul lui l{eagu qi Piriul $tiubeiului. Altitutlinea 210 -295 m. Apa<br />
freaticd, la 2-G m.<br />
Arboretul este un stejd,ret in care <strong>stejar</strong>ul se afld, in amestec rar eu<br />
ulmul, jugastrul, cire$ul, mdrul; subarboret d.e ar-tar, singer (abun<strong>de</strong>nt)'<br />
pdducel, salbd, moale, lemn ciinesc q.a. Yegetalia a fost mai inainte viguroasd,,<br />
<strong>stejar</strong>ul atingind la virsta tle 120-180 <strong>de</strong> ani ind,lfimi <strong>de</strong> 32-34<br />
m qi diametrul, la 1,30 m, d.e 50-100 cm.<br />
{Jscarea a inceput' din 1936, proba,bil din cauza stagnirii prelungite<br />
Ia suprafala solului a ap€i provenite din topirea z['peniIor, qi a continual,<br />
in anii secetoqi ln pd,rfile mai ridicate ale terenului. tr'enomenul a <strong>cu</strong>lminat<br />
in intervalul 1945-1948<br />
IJscarea s-a,r pntea atribui qi originii a,rhorilor (16*tari gare au <strong>de</strong>pd4it<br />
virsta exploatabilit5,tii). In aceasttr, pf,dure se usucd, ins5, qi arborete tinere<br />
<strong>de</strong> <strong>stejar</strong>, tle 60 <strong>de</strong> ani, provenite tot din l5,stari ; sint arborete pure, fd,r5,<br />
subarborot, <strong>cu</strong> solul inlelenit.<br />
Tot in aceastd pd,d.ure se ma,i observil cd, <strong>stejar</strong>ii provenili din ld,stari<br />
vegeteand, activ qi au creqteri mari, in arborete <strong>cu</strong> subetaj <strong>de</strong> carpen qi<br />
subarboret d.e arfar qi arbuqti.<br />
Solulr format pe un lut roqu <strong>cu</strong> pietri$ mare qi pietre mlate <strong>de</strong> granit<br />
gneiss, <strong>cu</strong>ar! filonian, jaspuri S.t!. este podzolit puternic in orizontul superior,<br />
ruginiu in restul profilului,<br />
Proiilul:<br />
Ar: (t - 15 cm, brun.mijlociu. bogat in humus, luto-nisillos, <strong>cu</strong> strucl.urii glonerulari<br />
buntr (flri rnuchii).<br />
15 - 40 cm, girlbui-albicios, <strong>cu</strong> pdte ruginii-<strong>de</strong>schis, lutos, <strong>cu</strong> mici t:oucre{iuni fero-<br />
Dranganoase, <strong>cu</strong> pictre rare, incomplet nuciform..<br />
A j/rl - 40 - 60 cm, t'u aspect marmorat (cenufiu-gilbui, <strong>cu</strong> ruginiu), lutos, <strong>cu</strong> tlumcroase<br />
concreliuni ferornanganoase mirttnte, slab prismatic'<br />
lJl :. C0 - 1:J5 cnr, ruginiu puternic <strong>cu</strong> nuanll bruntr, <strong>cu</strong> pete <strong>$i</strong> vine cenugii, late <strong>de</strong> cca<br />
1 cm, <strong>$i</strong> pete negrieioase, <strong>cu</strong> concreliuni feromanganoase) lutos.<br />
I).. : 1.35 -- 18O cnr, ruginiu aprins, <strong>cu</strong> numero&se concrefiuni f,eromanganoase mici, <strong>cu</strong> multe<br />
pietre rulate <strong>de</strong> 5 - LO im Q, luto-argilos.<br />
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