Ukubeka iliso rhoqo "kuxinzelelo lwamanzi" kwizityalo kubaluleke kakhulu kwiindawo ezomileyo kwaye ngokwesiko kuye kwenziwa ngokulinganisa ukufuma komhlaba okanye ukuphuhlisa iimodeli zokuphefumla nge-evapotranspiration ukuze kubalwe isixa somphunga womphezulu kunye nokuphefumla kwezityalo. Kodwa kukho ithuba lokuphucula ukusebenza kakuhle kwamanzi ngokusebenzisa ubuchwepheshe obutsha obuqonda ngokuchanekileyo xa izityalo zifuna ukunkcenkceshelwa.
Abaphandi bakhethe ngokungacwangciswanga amagqabi amathandathu awayechatshazelwe ngqo kumthombo wokukhanya baza bafaka izixhobo zokuvavanya amagqabi kuwo, bephepha imithambo ephambili kunye nemiphetho. Barekhoda imilinganiselo rhoqo ngemizuzu emihlanu.
Olu phando lungakhokelela ekuphuhlisweni kwenkqubo apho izixhobo zokubona amagqabi zithumela ulwazi oluchanekileyo lokufuma kwezityalo kwiyunithi ephakathi ebaleni, ethi emva koko inxibelelane ngexesha langempela nenkqubo yokunkcenkceshela ukuya kumanzisa izityalo.
Utshintsho lwemihla ngemihla kubukhulu bamagqabi beluncinci kwaye akukho tshintsho lubalulekileyo lwemihla ngemihla oluye lwabonwa njengoko amanqanaba okufuma komhlaba ayesuka kwinqanaba eliphezulu ukuya kwinqanaba lokubuna. Nangona kunjalo, xa ukufuma komhlaba bekungaphantsi kwinqanaba lokubuna, utshintsho kubukhulu bamagqabi lwalubonakala ngakumbi de ubukhulu bamagqabi buzinze kwiintsuku ezimbini zokugqibela zovavanyo xa umxholo wokufuma ufikelele kwi-5%. Umthamo, olinganisa amandla egqabi okugcina amandla, uhlala ungaguquki ubuncinane ngamaxesha obumnyama kwaye uyanda ngokukhawuleza ngamaxesha okukhanya. Oku kuthetha ukuba umthamo ubonakalisa umsebenzi we-photosynthesis. Xa umswakama womhlaba ungaphantsi kweqondo lokubuna, utshintsho lwemini kumthamo luyehla kwaye luyeke ngokupheleleyo xa umswakama womhlaba we-volumetric uwela ngaphantsi kwe-11%, nto leyo ebonisa ukuba impembelelo yoxinzelelo lwamanzi kumthamo ibonwa ngempembelelo yawo kwi-photosynthesis.
“Ubukhulu bephepha bufana nebhaluni—iyanda ngenxa yokufuma kwamanzi kunye nokuncitshiswa ngamanzi ngenxa yoxinzelelo lwamanzi okanye ukuphelelwa ngamanzi emzimbeni,"Ngamafutshane, amandla amagqabi ayatshintsha ngotshintsho kwimeko yamanzi yesityalo kunye nokukhanya okungqongileyo. Ngoko ke, uhlalutyo lobukhulu bamagqabi kunye notshintsho kumandla anokubonisa imeko yamanzi kwisityalo – umthombo woxinzelelo. »
Ixesha leposi: Jan-31-2024