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ka var uzinat cik kokam gadu
7, 2006, 22:01krista
:-:

    Pie mums koka vecumu var noteikt skaitot gadskārtas. Tādos klimatiskos apstākļos, kā pie mums, kur atšķiras ziema no vasaras, kokiem veidojas gadskārtas – pavasarī un vasarā viņi aug straujāk (veidojot gaišāku koksni) nekā rudeņos (kad veidojas tumšāka koksne). Ziemā koki neaug vispār. Līdz ar to koksnē veidojas ar aci redzamas joslas – gadskārtas. Lietusmežos koki neveido gadskārtas.

    Ja koks ir nozāģēts, tad gadskārtas var saskaitīt kaut vai uz celma virsmas. Ja koks ir augošs, tad koksnes parauga iegūšanai izmanto speciālus urbjus.

    Pēc koka resnuma un garuma vien noteikt tā vecumu nav iespējams. Piemēram, purvā augoša 400 gadīga priede būs daudzkārt mazāka nekā silā augoša 30 gadiniece.

    7, 2006, 22:54Zirneklītis

    Tikai jāņem vērā, ka vasarās ar sausumu pa vidu ( apmēram tā:jūnijs lietains, jūlijs sauss, augustā atkaļ šļakst)kokiem var veidoties divas "gadskārtas" vienā gadā. Bet nu, es domāju, ka šāda kļūda nav mirstamā vaina ...
    28, 2006, 17:30garamantu apkopējs
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