Ongororo pamiti yemakabichi inoratidza kuti fetereza inotorwa muweti netsvina yevanhu haina njodzi uye inogona kubatsira kudzikisa mitengo yechikafu.
Fetereza inotorwa kubva muweti yevanhu yakadzokororwa uye tsvina yakangochengetedzeka uye inoshanda seyakajairwa, maererano nemiedzo pamiti yekabichi. Kushandisa tsvina yevanhu nenzira iyi kunogona kubatsira kuderedza kushaikwa kwefetereza izvo zviri kupa kuti mitengo yezvekudya ikwire – kana vanhu vagutsikana kuti vashandise.
Nitrogen-based fertilizer zvinogadzirwa mu hurongwa hwesimba-simba kushandisa gasi rechisikigo sechinhu chakabikwa. Tsvina yemunhu inogona kuve kwakanakira kudya kwezvirimwa zvakaita senitrogen nephosphorus, asi inogona zvakare kutakura utachiona hunokonzera zvirwere uye tupukanana, saka inoda kunyatsogadziriswa kuti ichengetedzeke. Ichiri kushandiswa - dzimwe nguva isingagadziriswe - sefotereza mune dzimwe nyika dzine mari shoma, asi yakasiiwa zvakanyanya munyika dzine mari yakawanda.
Franziska Häfner paAgroscope muZurich, Switzerland, nevamwe vake vakaenzanisa makabheji anorimwa achishandisa organic fetereza inotorwa kubva kuvinasse, inogadzirwa nekugadzirwa kwe ethanol, nemafetireza akagadzirwa kubva muweti yemunhu uye tsvina.
Goho remakabheji akarimwa ne nitrified urine fertilizer (NUFs) akaenzana neaya akarimwa nemavinasse. Makabichi akarimwa aine manyowa emupfudze, kana manyowa nemaNUF pamwe chete, aive negoho rakaderera, asi fetereza iyi inogona kuwedzera kabhoni yevhu nekufamba kwenguva, ongororo yakawana.
Vatsvakurudzi vakaedzawo makemikari anodarika mazana matatu mucompost yetsvina, kusanganisira mishonga, zvinodzosa moto uye zvinodzinga zvipembenene. Ingori 300 muzana yeizvi zvakaonekwa, ese ari pakadzika zvakanyanya. Pakati pemishonga gumi neimwe yakaonekwa mucompost, maviri chete akawanikwa muzvikamu zvinodyiwa zvekabheji: painkiller ibuprofen uye anticonvulsant uye mood-stabilising drug carbamazepine. Asi huwandu hwekupedzisira hwaive hwakadzikira zvekuti waitoda kudya hafu yemiriyoni yemakabheji kuti uwane kamwe chete.
"Zvigadzirwa zvinobva mukudzoreredza weti netsvina yevanhu zvinogoneka uye zvakachengeteka nitrogen fetiraiza pakurima makabheji," Häfner akadaro mukutaura. "Vakapa goho rakafanana sechigadzirwa chefetereza, uye havana kuratidza njodzi maererano nekutapurirwa utachiona kana mishonga."
Kunobva: https://www.newscientist.com