Cika fom ɗin da ke ƙasa kuma za mu aiko muku da sigar PDF na ƙasan Kogin Riverside Mahimmin Tushen gurɓacewar Nitrate.
Nitrate da ke taruwa a cikin kasa kusa da koguna na taka muhimmiyar rawa wajen kara yawan sinadarin nitrate a cikin ruwan kogin a lokacin damina, in ji masu bincike daga jami’ar Nagoya da ke Japan.Binciken nasu, wanda aka buga a cikin mujallar Biogeoscience, zai iya taimakawa wajen rage gurɓataccen iska da kuma inganta ingancin ruwa a cikin ruwa mai zurfi kamar tafkuna da ruwa na bakin teku.
Nitrates wani sinadari ne mai mahimmanci ga tsirrai da phytoplankton, amma yawan nitrates a cikin koguna na iya lalata ingancin ruwa, yana haifar da eutrophication (fiye da wadatar ruwa tare da abubuwan gina jiki), kuma yana haifar da haɗari ga lafiyar dabbobi da ɗan adam.Ko da yake an san matakan nitrate a cikin kogunan ruwa yana karuwa lokacin da aka yi ruwan sama, ba a san dalilin da ya sa ba.
Akwai manyan ra'ayoyi guda biyu game da yadda nitrate ke ƙaruwa lokacin da aka yi ruwan sama.Bisa ka'idar farko, nitrates na yanayi yana narkewa a cikin ruwan sama kuma yana shiga cikin rafi kai tsaye.Ka’idar ta biyu ita ce, idan aka yi ruwan sama, kasa na yin nitrate a yankin da ke kan iyaka da kogin, wanda ake kira yankin kogin, ya shiga cikin ruwan kogin.
Don ci gaba da gudanar da bincike kan tushen sinadarin nitrates, wata tawagar bincike karkashin jagorancin Farfesa Urumu Tsunogai na Makarantar Graduate na Nazarin Muhalli, tare da hadin gwiwar Cibiyar Nazarin Gurbacewar iska ta Asiya, ta gudanar da wani bincike don nazarin sauye-sauye a cikin abun da ke tattare da sinadarin nitrogen da isotopes oxygen nitrates da lokacin ruwan sama mai yawa.Ƙara yawan nitrates a cikin koguna.
Wani bincike da aka yi a baya ya ba da rahoton karuwar yawan nitrate a lokacin hadari a wani kogin da ke saman kogin Kaji a yankin Niigata a arewa maso yammacin Japan.Masu binciken sun tattara samfuran ruwa daga magudanar ruwa na Kajigawa, ciki har da magudanan ruwa da ke saman kogin.A lokacin guguwa guda uku, sun yi amfani da autosamplers don samfurin kogunan ruwa a kowace awa na sa'o'i 24.
Tawagar ta auna ma'auni da abun da ke tattare da isotopic na nitrates a cikin ruwan rafi, sa'an nan kuma kwatanta sakamakon tare da maida hankali da kuma isotopic abun da ke ciki na nitrates a cikin ƙasa a yankin bakin teku na rafi.A sakamakon haka, sun gano cewa yawancin nitrates suna fitowa daga ƙasa ba daga ruwan sama ba.
"Mun yanke shawarar cewa wanke nitrates na kasa na bakin teku a cikin koguna saboda karuwar matakan ruwa da kuma ruwan karkashin kasa shine babban dalilin karuwar nitrates a cikin magudanar ruwa a lokacin hadari," in ji Dokta Weitian Ding na Jami'ar Nagoya, marubucin binciken.
Ƙungiyar binciken ta kuma yi nazari kan tasirin nitrate na yanayi akan karuwar nitrate a lokacin hadari.Abubuwan da ke cikin nitrates na yanayi a cikin ruwan kogin bai canza ba, duk da haɓakar hazo, wanda ke nuna ɗan tasiri na tushen nitrates na yanayi.
Har ila yau, masu binciken sun gano cewa nitrates na ƙasa na bakin teku suna samar da ƙananan ƙwayoyin ƙasa."An yi imani cewa nitrates na asalin ƙwayoyin cuta suna taruwa a cikin ƙasan bakin teku kawai a lokacin rani da kaka a Japan," in ji Farfesa Tsunogai."Daga wannan hangen nesa, zamu iya hasashen cewa karuwar nitrates a cikin kogin saboda ruwan sama zai faru ne kawai a cikin wadannan lokutan."
Reference: Dean W, Tsunogai W, Nakagawa F, et al.Bin diddigin tushen nitrates a cikin rafukan dazuzzuka ya nuna haɓakar ƙima yayin abubuwan da suka faru na guguwa.Kimiyyar halittu.2022;19 (13):3247-3261.doi: 10.5194/bg-19-3247-2022
An sake buga wannan labarin daga abu mai zuwa.Lura.Wataƙila an gyara abubuwan da aka gabatar don tsayi da abun ciki.Don ƙarin bayani, duba tushen da aka ambata.