Cov tub ntxhais hluas txheej ntoo, nyob ncaj qha rau hauv qab tawv, yog sapwood (tseem hu ua sapwood, underbark, blon). Nws yog suav hais tias yog tsis tshua muaj resistant mus tua los ntawm kab los yog fungi, thiab kuj muaj tsawg zog thiab muaj ib tug ntau ntawm cov dej, piv nrog ripe puab ib feem ntawm tsob ntoo thiab cov tub ntxhais. Hauv qhov xwm txheej, muaj cov ntoo zoo li no, cov ntoo uas muaj tag nrho ntawm sapwood, piv txwv li, aspen. Ib tug tuab resinous loj yog tso rau hauv nws - resin, uas yog tau los ntawm kev txiav nyob rau hauv bark on coniferous ntoo.
qauv ntoo
Ntoo muaj cov qauv hauv qab no:
- Nucleus - yog tsim los ntawm kev tuag ntawm cov hlwb nyob. Nws yog xim dub.
- Sapwood yog txheej uas nqa cov as-ham thiab dej los ntawm cov hauv paus hniav mus rau nplooj.
- Cambium yog txheej nyias ua los ntawm cov hlwb muaj sia. Los ntawm nws los txog qhov nce txhua xyoo ntawm tsob ntoo.
- Bast txheej - ua cov organic uas tsim tawm hauv nplooj mus rau cov hauv paus hniavtsob ntoo.
- Bark yog txheej txheej ntxhib. Nws ua haujlwm tiv thaiv ntau yam kev puas tsuaj thiab huab cua.
sapwood yog dab tsi?
Sapwood yog txheej ntoo uas nyob hauv qab ntawm tsob ntoo. Nws nqa dej los ntawm lub hauv paus system mus rau nplooj. Lub sapwood yog xim sib dua li sab hauv ntawm tsob ntoo, hu ua core. Nws muaj zog tsawg thiab tiv thaiv kab mob fungal thiab kab. Nws paub tias:
- Qee tsob ntoo, uas yog birch thiab aspen, yog tsim los ntawm sapwood nkaus.
- Nyob hauv cov ntoo qhib, cov hauv qab tsis siv vim qhov muag muag.
- Kev siv cherry sapling yog txiav txim siab pom.
Pine ntoo hauv qab cov tawv ntoo muaj cov khoom muaj txiaj ntsig zoo hu ua resin, uas, thaum muab rho tawm, nthuav tawm cov sapwood saum npoo. Tsis tas li ntawd, txij thaum ub los, tib neeg tau siv cov txheej no ntawm qee cov ntoo hluas ua zaub mov.
Cov ntoo hluas ntawm txhua hom tsis muaj cov noob, lawv muaj cov ntoo ntoo tag nrho. Tsuas yog lub sijhawm dhau los, cov ntoo no nkag mus rau hauv cov tub ntxhais vim yog kev thaiv ntawm txoj hauv kev uas cov dej nkag mus, resins, calcium carbonate thiab tannins. Yog li ntawd, cov xim ntawm cov tub ntxhais yuav tsaus ntuj. Hauv cov ntoo sib txawv, lub sijhawm luv rau kev tsim cov nucleus nyob ntawm qhov loj hlob thiab hom. Kev hloov ntawm subcortex mus rau lub hauv paus tuaj yeem ua tau ob qho tib si du thiab nrawm.
khoom noj khoom haus zoo
Sapwood or sapwood is a young layer of wood. Nws ua tau heevsiv rau zaub mov. Nyob rau hauv lub xyoo kev tshaib kev nqhis, cov neeg nyob ntawm Leningrad thaum lub sij hawm blockade noj lub thiaj li hu ua "birch porridge", uas yog, birch sapwood, thiab cov neeg sab qaum teb - spruce. Ntau txoj kev ua noj:
- Pine, spruce yog finely txiav thiab boiled, thaum hloov dej ob peb zaug. Cov txheej txheem no yog tsim nyog los tshem tawm cov resin. Tom qab ntawd qhuav thiab ntxiv rau mis nyuj, hmoov lossis noj tam sim.
- Cov birch yog crushed, ncuav nrog dej thiab tos kom txog thaum nws swells. Tom qab ntawd boil.
Tsis tas li ntawd, cov sapwood ntawm larch, linden, thiab aspen yog noj. Nws yog lub npe hu hais tias Kamchatka neeg yos hav zoov, tawm mus nuv ntses, tsuas yog salmon caviar los ntawm zaub mov. Ntawm txoj kev, lawv txiav birch sapwood thiab noj nws es tsis txhob khob cij.
Kev ua haujlwm hauv qab rau ntoo
Nyob rau hauv ib tsob ntoo sawn, sapwood ua ib tug insulating muaj nuj nqi, thiab nyob rau hauv ib tug muaj sia, nws yog ib tug conductor ntawm cov dej los ntawm lub hauv paus system mus rau nplooj, thiab kuj pab mus rau nteg cov khoom seem nyob rau hauv ntoo. Sapwood raug tshem tawm thaum lub sij hawm tsim cov cav sib npaug, thiab rau cov ntoo txiav ntoo yog khaws cia, yog li lawv txhim khu kev qha thiab ruaj khov. Lawv tsis ntshai:
- cua thiab te;
- kub hloov pauv;
- ultraviolet rays.
Vim qhov tseeb tias sapwood yog txheej ntoo nrog zoo absorbency, cav kho nrog tshuaj tua kab mob muaj kev tiv thaiv zoo. Xws li ntoo yog siv los tsim tsev nyob rau hauv cov tsoos Lavxias teb sab style.
