Masana kimiyya daga Jami'ar Utah sun gano shaidar cewa 'yan asalin Arewacin Amirka sun shafe shekaru 10 suna cin dankalin daji.
An yi nazari sosai kan tarihin cin dankalin daji kafin amfanin gonakin ɗan adam kuma har kwanan nan ya iyakance ga Kudancin Amurka. Don haka, a cikin 2016, masana kimiyya sun sami shaidar cewa Indiyawan da ke cikin Andes sun noma dankali kimanin shekaru 5000 da suka wuce. A Arewacin Amurka da Tsakiyar Amurka, aƙalla nau'ikan daji guda 20 na tushen amfanin gona daga jinsin Solanum (iyali nightshade), amma har yanzu ba a tabbatar da mahimmancin su a cikin abincin mutanen zamanin da ba. Masu binciken kayan tarihi na Amurka sun cika wannan gibin kuma sun yi nazari kan granules na sitaci da aka samu a daya daga cikin tsoffin abubuwan tona asirin.
Bayanai game da amfani da nau'in dankalin turawa na daji Dankali An riga an samo su a Kudancin Amirka, a cikin Casma Valley, Peru, kuma sun kasance shekaru 7, ko da yake babu wata yarjejeniya tsakanin masana kimiyya ko waɗannan tsire-tsire ne na daji ko kuma sun riga sun kasance cikin gida. Don sabon binciken, masanan kimiyya sun yi amfani da abubuwan da aka samo daga wurin mafaka na Arewa Creek a kudancin Utah. An sami shaidu da yawa na rayuwar mutanen da a can: hearths da ramuka, kayan aikin dutse, ragowar tsire-tsire da dabbobi. Binciken da aka yi ya nuna akwai nau'o'in al'adu guda bakwai, tun daga shekaru 800 da suka wuce.
Masana kimiyya sun binciki ragowar da ke saman kayan aikin dutse 101 da aka samu a nan. Filayen kayan kida 24 sun ƙunshi sitaci guda 323, waɗanda a ƙarshe aka gano granules tara a matsayin na nau'in dankalin daji. Solanum jamesii kuma 61 granules an gano a matsayin yuwuwar barbashi na wannan shuka. Binciken radiocarbon na kayan aikin dutse, wanda aka gano ragowar dankali, ya nuna shekaru 10-900. Kuma wannan binciken, a cewar masana kimiyya, shine farkon bayanan da aka rubuta na amfani da dankali a Arewacin Amurka. Kuma tun da dankali ya zo Turai daga Amurka, to watakila waɗannan su ne mafi dadadden ragowar dankali a duniya.
A baya, masu binciken kayan tarihi sun riga sun gano alamun amfani da tsiron daji da mutane suka yi kafin noman su. Don haka, an yi amfani da hatsin daji a Italiya shekaru 32 da suka shige, da sha’ir da alkama a Isra’ila shekaru 600 da suka shige.
An buga binciken ne a cikin Ayyukan Cibiyar Nazarin Kimiyya ta Ƙasa.
source: https://chrdk.ru