{"id":421,"date":"2007-02-20T13:30:00","date_gmt":"2007-02-20T13:30:00","guid":{"rendered":""},"modified":"2025-10-23T10:02:44","modified_gmt":"2025-10-23T10:02:44","slug":"agaclarin-yasi-nasil-belirlenir-421","status":"publish","type":"post","link":"https:\/\/gardensel.com\/tr\/agaclarin-yasi-nasil-belirlenir-421","title":{"rendered":"A\u011eA\u00c7LARIN YA\u015eI NASIL BEL\u0130RLEN\u0130R?"},"content":{"rendered":"<p><span class=\"gs-wm-wrap\"><img loading=\"lazy\" decoding=\"async\" src=\"\/images\/stories\/idedeoglu\/yllk_halka.gif\" border=\"0\" alt=\"yllk_halka\" title=\"yllk_halka\" hspace=\"10\" vspace=\"5\" width=\"241\" height=\"232\" align=\"left\" \/><i class=\"gs-wm-badge\" aria-hidden=\"true\"><\/i><\/span>Kesilmi\u015f bir a\u011fa&ccedil; g&ouml;vdesi &uuml;zerindeki halkalar\u0131 &ccedil;o\u011fumuz biliyoruz. Bir a\u011fac\u0131n ya\u015f\u0131n\u0131 belirlemek i&ccedil;in &ouml;ncelikle bu halkalardan yararlan\u0131r\u0131z. Asl\u0131nda bu halkalar a\u011fac\u0131n ya\u015f\u0131 yan\u0131nda daha bir&ccedil;ok &ouml;nemli bilgi bar\u0131nd\u0131r\u0131r. <\/p>\n<p>A\u011fa&ccedil; halkalar\u0131n\u0131n varl\u0131\u011f\u0131 mevsimlerle yak\u0131ndan ili\u015fkilidir. Mevsimsel farkl\u0131l\u0131klar\u0131n bulundu\u011fu kuzey yar\u0131k&uuml;rede b&uuml;y&uuml;me s&uuml;rekli olmay\u0131p, ilkbaharla birlikte h\u0131zlan\u0131r, yaz\u0131n azal\u0131r. \u0130\u015fte bu b&uuml;y&uuml;me h\u0131z\u0131 farkl\u0131l\u011f\u0131ndan dolay\u0131 ilkbaharda olu\u015fan odun dokular\u0131 a&ccedil;\u0131k renkli, yaz\u0131n olu\u015fan odun dokular\u0131 ise koyu renkli halkalar \u015feklinde g&ouml;r&uuml;l&uuml;r.<br \/>\n &nbsp; <\/p>\n<p>\nBu durumda bir a&ccedil;\u0131k ve bir koyu renkli halka bir y\u0131ll\u0131k bir b&uuml;y&uuml;meye kar\u015f\u0131l\u0131k gelir. Y\u0131ll\u0131k halkalar diye bilinen bu halkalar\u0131n say\u0131s\u0131 a\u011fac\u0131n ya\u015f\u0131n\u0131 vermektedir. <\/p>\n<p>Y\u0131ll\u0131k halkalar\u0131n bize sundu\u011fu bilgiler a\u011fac\u0131n ya\u015f\u0131 ile s\u0131n\u0131rl\u0131 de\u011fildir. Bu halkalar yard\u0131m\u0131yla;\n<\/p>\n<ul>\n<li>Arkeolojik kal\u0131nt\u0131lar\u0131n tarihlenmesi <\/li>\n<li>Ge&ccedil;mi\u015fte olu\u015fan erozyon ve &ccedil;&ouml;kelim h\u0131z\u0131n\u0131n belirlenmesi <\/li>\n<li>Radyoaktif karbon yoluyla saptanan ya\u015flar\u0131n do\u011frulanmas\u0131 <\/li>\n<li>&Ouml;nemli orman zararlar\u0131n\u0131n veya yang\u0131nlar\u0131n ger&ccedil;ekle\u015fti\u011fi tarihlerin anla\u015f\u0131lmas\u0131 <\/li>\n<li>Ge&ccedil;mi\u015fte ya\u015fanan iklim de\u011fi\u015fikliklerinin ortaya konmas\u0131 m&uuml;mk&uuml;n olur&#8230; <\/li>\n<\/ul>\n<p>\n&nbsp;\n<\/p>\n<p>\n&Ccedil;ok genel olarak y\u0131ll\u0131k b&uuml;y&uuml;me halkalar\u0131n\u0131n yard\u0131m\u0131yla ge&ccedil;mi\u015fte ya\u015fanm\u0131\u015f t&uuml;m bu olaylar\u0131 belirlemeye &ccedil;al\u0131\u015fan bilim dal\u0131na Dendrokronoloji denmektedir. Ya\u015fayan dikili haldeki bir a\u011fac\u0131n ya\u015f\u0131 Art\u0131m Burgusu denilen bir alet yard\u0131m\u0131yla bulunur. Ormanc\u0131l\u0131k &ccedil;al\u0131\u015fmalar\u0131ndaki m&uuml;hendislik esaslar\u0131 &ccedil;er&ccedil;evesinde yap\u0131lan &ouml;l&ccedil;&uuml;m i\u015flemlerinde bu alet &ccedil;ok i\u015fimize yaramaktad\u0131r. Bu art\u0131m burgusu; ya\u015f\u0131 &ouml;l&ccedil;&uuml;lecek a\u011fac\u0131n g&ouml;vdesinin yerden 1.30 m y&uuml;ksekli\u011findeki b&ouml;lgesinde, a\u011fac\u0131n g&ouml;vdesine &ccedil;evirmek suretiyle sokulur. Daha sonra halka ka\u015f\u0131\u011f\u0131 yard\u0131m\u0131 ile a\u011faca zarar vermeden bir ya\u015f halkas\u0131 &ccedil;ubu\u011fu d\u0131\u015far\u0131ya &ccedil;\u0131kar\u0131l\u0131r. Ve bu &ccedil;ubuk &uuml;zerinden a\u011fac\u0131n y\u0131ll\u0131k halkalar\u0131 kolayca say\u0131l\u0131r. Tabi bu i\u015flemin daha bir&ccedil;ok teknik ayr\u0131nt\u0131lar\u0131 bulunmakta olup, burada k\u0131saca anlatmaya &ccedil;al\u0131\u015ft\u0131k&#8230; Yan tarafta bir art\u0131m burgusu b&ouml;l&uuml;mleri ile birlikte g&ouml;sterilmi\u015ftir. <\/p>\n<p>Baz\u0131 a\u011fa&ccedil; t&uuml;rlerinin &ccedil;ok uzun y\u0131llar ya\u015fayabildi\u011fini biliyor musunuz? D&uuml;nyan\u0131n saptanm\u0131\u015f en ya\u015fl\u0131 a\u011fac\u0131 Sierra-Nevada&#39;n\u0131n (Kaliforniya-ABD) kuzeybat\u0131 yama&ccedil;lar\u0131nda denizden 3275 m. y&uuml;ksekte yeti\u015fmi\u015f bir &ccedil;am a\u011fac\u0131d\u0131r. (Pinus longaeva) 1963-1964 y\u0131llar\u0131nda yap\u0131lan tespitlerle bu a\u011fac\u0131n yakla\u015f\u0131k 4900 y\u0131ll\u0131k oldu\u011fu anla\u015f\u0131lm\u0131\u015ft\u0131. Bu a\u011fa&ccedil; g&uuml;n&uuml;m&uuml;zde ne yaz\u0131k ki ya\u015fam\u0131yor, insano\u011flu&#39;nun ac\u0131mas\u0131z testeresinden kurtulmay\u0131 ba\u015faramad\u0131&#8230; <strong>Kaynak:<\/strong> OGM<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kesilmi\u015f bir a\u011fa&ccedil; g&ouml;vdesi &uuml;zerindeki halkalar\u0131 &ccedil;o\u011fumuz biliyoruz. Bir a\u011fac\u0131n ya\u015f\u0131n\u0131 belirlemek i&ccedil;in &ouml;ncelikle bu halkalardan yararlan\u0131r\u0131z. Asl\u0131nda bu halkalar a\u011fac\u0131n ya\u015f\u0131 yan\u0131nda daha bir&ccedil;ok &ouml;nemli bilgi bar\u0131nd\u0131r\u0131r. A\u011fa&ccedil; halkalar\u0131n\u0131n varl\u0131\u011f\u0131 mevsimlerle yak\u0131ndan ili\u015fkilidir. Mevsimsel farkl\u0131l\u0131klar\u0131n bulundu\u011fu kuzey yar\u0131k&uuml;rede b&uuml;y&uuml;me s&uuml;rekli olmay\u0131p, ilkbaharla birlikte h\u0131zlan\u0131r, yaz\u0131n azal\u0131r. \u0130\u015fte bu b&uuml;y&uuml;me h\u0131z\u0131 farkl\u0131l\u011f\u0131ndan dolay\u0131 ilkbaharda olu\u015fan [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[421],"tags":[],"fp_columnist":[],"class_list":["post-421","post","type-post","status-publish","format-standard","hentry","category-orman-ve-ormancilik-bilgileri"],"_links":{"self":[{"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/posts\/421","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/comments?post=421"}],"version-history":[{"count":1,"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/posts\/421\/revisions"}],"predecessor-version":[{"id":172927,"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/posts\/421\/revisions\/172927"}],"wp:attachment":[{"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/media?parent=421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/categories?post=421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/tags?post=421"},{"taxonomy":"fp_columnist","embeddable":true,"href":"https:\/\/gardensel.com\/tr\/wp-json\/wp\/v2\/fp_columnist?post=421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}