Am mai spus si in alt topic cum sta treaba cu cercul ala...si asta este doar o explicatie din multe altele
Citat din: Shadowman din 29 August 2008, 18:25:54
Video :
http://www.newsin.ro/ozn-sibiu.php?cid=view&nid=3e2025c6-56e0-4af0-bff5-03059e65077e&hid=video
Nu este vorba in nici un caz de un OZN ci mai bine spus de un nou caz numit si ''Fairy ring'' (http://en.wikipedia.org/wiki/Fairy_ring)
Explicatia acelui cerc cu iarba uscata/moarta aparuta la Sibiu este foarte simpla.
Anumiti pori/bacterii microscopici provenite de la unele ciuperci pot produce 3 feluri de astfel de cercuri.Toate in timp printr-un anumit proces.
1.Cercuri formate din ciuperci
2.Cercuri formate din iarba mai inchisa la culoare
3.Cercuri formate prin iarba uscata/moarta
O imagine cu un cerc format din ciuperci:
(http://img392.imageshack.us/img392/2680/image1op5.jpg)
O imagine cu un cerc din iarba mai inchisa la culoare:
(http://img294.imageshack.us/img294/3183/fairyring11bv4.jpg)
O imagine cu un cerc din iarba uscata/moarta
(http://img294.imageshack.us/img294/629/screenhunter297nu4.jpg)
Mai jos la acest post voi atasa un fisier in format PDF referitor la astfel de cercuri aparute in iarba,unde se explica mai bine cum si de ce.Va rog sa-l citit.Este in limba engleza din pacate dar foarte informativ.
Citez cateva fragmente din PDF'ul respectiv:
CitatSYMPTOMS
Fairy ring fungi produce three kinds of symptoms: mushrooms, dark green rings, and rings of dying turf.
CitatCONCLUSIONS
Fairy rings are caused by certain species of mushroom-forming fungi growing on the organic matter in the soil. Rings expand as the fungus continues to grow outward. Management of fairy ring consists primarily of prevention and judicious use of strobulurin fungicides when symptoms appear. Although the name fairy ring evokes fantastic images of fairies dancing on the turf, the disease is much more like a nightmare for golf course superintendents. JAMES FARRAR, PH.D., is assistant professor in plant pathology at California State University in Fresno.
Iar pentru cei care cred ca prin unele paduri misuna consanzene care danseaza si fac cercuri prin iarba, le dedic urmatorul citat:
Citat~at night,fairies come out of their hiding places,join hands,and dance in a circle.By morning, mushrooms have sprouted
in the circularpath where the fairies danced. "BY JAMES J. FARRAR
(http://img294.imageshack.us/img294/859/2573579170062438154yupjve0.jpg)
Un alt exemplu:
http://plantpathology.tamu.edu/Texlab/Lawns/fr.html
PS: inca un caz pe care l-am rezolvat din fotoliu :wink: