Imveliso yerayisi yerayisi inobudlelwane obukhulu kunye nokoma kwayo kunye nokufuma. Ngokuqhelekileyo, isivuno serayisi simalunga nama-70%. Nangona kunjalo, ngenxa yeendidi kunye nezinye izinto zahlukile, isivuno esithile serayisi kufuneka sinqunywe ngokweyona meko. Ireyithi yemveliso yerayisi isetyenziswa ngokubanzi ukujonga umgangatho werayisi njengesalathiso esibalulekileyo, ikakhulu kubandakanywa izinga elirhabaxa kunye nereyithi yokugaya irayisi.
Izinga elirhabaxa libhekisa kwipesenti yobunzima berayisi engapholiswanga kubunzima berayisi, obusuka kuma-72 ukuya kuma-82%. Inokugotywa ngomatshini wokugoba okanye ngesandla, kwaye ke ubunzima berayisi engapholiswanga bunokulinganiswa kwaye umlinganiselo orhabaxa unokubalwa.
Ireyithi egayiweyo yerayisi ibhekiswa kubunzima berayisi egayiweyo njengepesenti yobunzima berayisi, kwaye uluhlu lwayo luqhele ukuba ngama-65-74%. Inokubalwa ngokugaya irayisi emdaka ukususa i-bran layer kunye nomatshini werayisi ogayiweyo kunye nokulinganisa ubunzima berayisi egayiweyo.
Izinto ezichaphazela isivuno serayisi zezi zilandelayo:
1) Ukusetyenziswa ngokungafanelekanga kwesichumisi
Emva kokukhetha isichumiso esingafanelekanga ekukhuleni kwerayisi kunye nokusetyenziswa kwesichumiso senitrogen eninzi kwinqanaba lokuhlakula kunye nenqanaba lokuvuthwa, kulula ukulibazisa ukusebenza kakuhle kwesichumisi sokuhlakula kunye nokulibazisa ukuhlanjululwa kwerayisi, kodwa xa umphumo wesichumisi ubonakaliswa kwinqanaba lokudibanisa, kulula ukubonakala indawo yokulala, kwaye ichaphazela isivuno, ngaloo ndlela ichaphazela isivuno serayisi.
(2) Ukwenzeka kwezifo nezinambuzane
Ngexesha lokukhula kwerayisi, ezinye izifo kunye nezinambuzane zezinambuzane, ezifana ne-rice blast, i-sheath blight, i-rice borers kunye nezinye iintlobo, zivame ukwenzeka. Ukuba azilawulwa kwangethuba, isivuno serayisi kunye nesantya sesivuno serayisi siyachaphazeleka lula.
(3) Ulawulo olugwenxa
Ngexesha lokulima, ukuba iqondo lokushisa liyehla, ukukhanya kuba buthathaka kwaye iindlela ezifanelekileyo azizange zamkelwe ngexesha lokusombulula imeko, kulula ukunyusa ingqolowa engenanto, kwaye isivuno kunye nesivuno serayisi nazo zichaphazeleka.
Ixesha lokuposa: Feb-16-2023