Ishyamba rimaze kwibasirwa n’umuriro, ingaruka mbi cyane ni ugutwika cyangwa gutwika ibiti.Ku ruhande rumwe, kugabanuka kw’amashyamba, kurundi ruhande, ubwiyongere bw’amashyamba bwagize ingaruka zikomeye.Amashyamba ni umutungo ushobora kuvugururwa ufite igihe kirekire cyo gukura, kandi bisaba igihe kirekire kugirango bakire nyuma yumuriro. Cyane cyane nyuma yubushyuhe bukabije bw’umuriro munini w’amashyamba, amashyamba biragoye kuyakira kandi akenshi asimburwa n’amashyamba akura make cyangwa ibihuru.Niba byangiritse kenshi n’umuriro, bizashoboka guhinduka ubutayu cyangwa n'ubutaka bwambaye ubusa.
Ibinyabuzima byose biri mwishyamba, nkibiti, ibihuru, ibyatsi, mose, ibinyamisogwe, amababi yapfuye, humus, na peat, birashobora gutwikwa. Muri bo, umuriro ugurumana, uzwi kandi nk'umuriro ufunguye, urashobora guhindagura gaze yaka umuriro kugirango ubyare umuriro, bingana na 85 ~ 90% byamashyamba yose ashobora gutwikwa.Birangwa numuvuduko ukwirakwira vuba, ahantu hanini ho gutwikwa, no gukoresha ubushyuhe bwayo ubwabyo bingana na 2 ~ 8% byubushyuhe bwose.
Amashanyarazi yaka umuriro azwi kandi nk'umuriro wijimye, ntashobora kubora gaze yaka umuriro, nta muriro, nk'urusenda, ibiti biboze, bingana na 6-10% by'amashyamba yose ashobora gutwikwa, ibiranga ni umuvuduko ukwirakwira, igihe kirekire, gukoresha ubushyuhe bwabo, nka peat irashobora kumara 50% yubushyuhe bwayo bwose, mubihe bitose birashobora gukomeza gutwikwa.
Ikiro kimwe cy'inkwi kimara metero kibe 32 kugeza kuri 40 z'umwuka (metero 06 kugeza 0.8 kubice bya ogisijeni isukuye), bityo gutwika amashyamba bigomba kuba bifite ogisijeni ihagije kugirango bibeho. Mubisanzwe, ogisijeni mu kirere igera kuri 21% .Iyo umwuka wa ogisijeni urimo umwuka wagabanutse kugera kuri 14 kugeza kuri 18 ku ijana, gutwikwa birahagarara.
Igihe cyo kohereza: Werurwe-31-2021