Nitrogen (ko nitrogen "N") shine ɗayan mahimman abubuwan da aka samo a cikin biosphere, kuma zasu sake zagayowar. Kimanin kashi 80% na iska yana dauke da wannan sinadarin, wanda a cikinsa atom biyu ake hada kwayoyin N2. Alaka tsakanin wadannan kwayoyin halitta tana da karfi sosai. Nitrogen, wanda yake cikin yanayin "daure", duk mai rai yana amfani dashi. Lokacin da kwayoyin nitrogen suka kasu kashi biyu, N atoms suna shiga cikin halaye daban-daban, suna hade da atam din wasu abubuwa. N yana yawan haɗuwa da oxygen. Tunda a cikin irin waɗannan abubuwa haɗin nitrogen da wasu kwayoyin halitta yana da rauni sosai, ƙwayoyin rai suna ɗaukar shi da kyau.
Ta yaya sake zagayowar nitrogen ke aiki?
Nitrogen yana zagayawa a cikin muhalli ta hanyar rufewa da haɗaɗɗun hanyoyin. Da farko dai, ana fitar da N yayin bazuwar abubuwa a cikin ƙasa. Lokacin da tsire-tsire suka shiga cikin ƙasa, ƙwayoyin halitta suna cire nitrogen daga gare su, don haka ya juya zuwa cikin ƙwayoyin da ake amfani dasu don tafiyar da rayuwa. Ragowar atom din suna haduwa da atamfofin wasu abubuwa, bayan an sake su a sifar ammonium ko ammonia ions. Sannan nitrogen yana ɗaure da wasu abubuwa, bayan haka ne ake samun nitrates, waɗanda suke shiga shuke-shuke. A sakamakon haka, N yana shiga cikin bayyanar kwayoyin. Lokacin da ciyawa, bishiyoyi, bishiyoyi da sauran fure suka mutu, suka shiga cikin ƙasa, nitrogen ya dawo ƙasa, bayan haka sake zagayowar zai sake farawa. Nitrogen yana ɓacewa idan ɓangare ne na abubuwa masu narkewa, jujjuya su zuwa ma'adanai da duwatsu, ko yayin aikin ɓatancin ƙwayoyin cuta.
Nitrogen a cikin yanayi
Iskar ba ta da kimanin tan quadrillion 4 na N, amma kusan tan tiriliyan 20 a cikin Tekun Duniya. tan. Wannan bangare na sinadarin nitrogen da ke cikin kwayar halittar rayayyun halittu ya kai kimanin miliyan 100. Daga cikin wadannan, tan miliyan 4 ana samunsu ne a cikin fure da dabbobi, sauran miliyan 96 kuma suna cikin kananan halittu. Sabili da haka, yawancin nitrogen yana cikin ƙwayoyin cuta, wanda N ke ɗaure dashi. Kowace shekara, yayin aiwatarwa daban-daban, ana ɗaure tan 100-150 na nitrogen. Ana samun mafi girman adadin wannan sinadarin a takin karkashin kasa wanda mutane ke samarwa.
Sabili da haka, sake zagayowar N wani ɓangare ne na matakan halitta. Saboda wannan, canje-canje iri-iri suna haifar. Sakamakon aikin anthropogenic, akwai canji a zagayen nitrogen a cikin muhalli, amma ya zuwa yanzu wannan ba ya haifar da babban haɗari ga mahalli.
