Iav raug tsim yog qhov tseem ceeb heev rau kev ua kua dej qab zib. Thaum cov Covid muaj teebmeem, kev thov rau cov dej qab zib poob - tab sis muaj cov cim qhia tias nws tau pib khaws qeeb.
Xyoo no, kev thov thoob ntiaj teb rau cov iav tsim ua cov khoom lag luam yuav tsum kwv yees li 3.8 lab tonnes, lossis li ntawm 6 feem pua, nrog kev thov hauv kev lag luam iav poob los ntawm 3.1 lab tonnes, lossis 9 feem pua. Tab sis cov nqi tsis ntev los no tau pib nce, hais tias qhov kev thov xav tau zoo, ua rau pom txog kev poob rau Suav cov neeg tsim khoom lag luam.
Feem ntau cov neeg tsim dej qab zib tau txo ntau lawm vim muaj cov xav tau poob thaum lub sijhawm muaj thoob qhov thoob. Kev lag luam iav haus txog 50% ntawm tag nrho cov dej qab zib. Ntxiv rau Suav Tebchaws, cov thawv iav kev lag luam noj 24% ntawm alkali, ca iav 23% thiab lwm yam iav 5%. Tuam Tshoj yog lub ntiaj teb' s kev tsim cov iav loj tshaj plaws, yog li thaum koj xav txog Tuam Tshoj, cov txheeb cais no suav txog 18% ntawm tag nrho cov khob ntim dej qab zib xav tau, 29% ntawm cov iav tiaj thiab 5% ntawm lwm yam iav.
