Stevia (Stevia rebaudiana) yakawana mukurumbira seimwe inotapira inotapira nekuti ine glycosides iyo inosvika kusvika mazana matatu inotapira kupfuura chena chena shuga. Mumamiriro ekunze anodziya (USDA zones 300-9), iri chirimwa chisingaperi, asi hachizodonhe munzvimbo dzinotonhora zvakanyanya uye munzvimbo idzodzo, inorapwa segore. Boka rinotungamirwa naDr David Shew weNorth Carolina State University rakaitisa miedzo yakawanda yemumunda kuti iongorore mashandisirwo aro seimwe chirimwa. NC State zvakare chirongwa chekuberekesa chiri kugadzira nyowani nyowani
yakakodzera kune inopisa uye ine hunyoro mamiriro ezhizha akapararira muSouth US
Zvese zvirimwa zvine yakakwana pH renji kunze kwayo idzo zvirimwa zvichanetseka. Pane yakakwira substrate pH nhanho dzinovaka muviri dzakadai seFe, manganese (Mn), zinc (Zn), uye mhangura (Cu) inova shoma kushomeka kumuti. Muzviitiko zvakawanda zvirimwa zvine huremu hwepamusoro pH hunhu zvichaona Fe-kushomeka kwezviratidzo. Iron chinhu chisingafambike mumuti uye nekuda kweizvozvo haigone kutamiswa kubva kumashizha epasi kuzosangana nezvinodiwa nemiti muzvikamu zvitsva zviri kusimukira zvemuti.
Nekudaro, kana uchiedza kuongorora Fe-kushomeka zvakakosha kuti uwane nzvimbo yechiratidzo chekubatsira kubvisa kumwe kushomeka kwehutano. Mune ino kesi ye stevia, zvirimwa zvepamusoro zvikamu zviri kuratidza yero uye inopindirana chlorosis (Fig. 3). Saka, ne
kusanganiswa kwenzvimbo yechiratidzo, uye alkaline substrate pH inokoshesa chikonzero cheiyo interveinal chlorosis ndeye Fe-kushomeka nekuda kweiyo yakakwira substrate pH mazinga.
Verenga chinyorwa chakazara pa www.e-gro.org.
