Ua ntej tshaj plaws, nkag siab txog kev xav tau zaub mov noj ntawm cov nyuj thiab yaj yog qhov yuav tsum tau xaiv cov khoom siv uas tsim nyog pub. Raws li ruminants, nyuj thiab yaj muaj lawv tus kheej tshwj xeeb hauv kev zom thiab nqus tau noj. Cov nyuj tsuas yog pub rau ntawm roughage, xws li quav nyab, silage, thiab lwm yam, thaum cov yaj muaj qhov xav tau ntau dua rau cov protein thiab lub zog. Yog li ntawd, thaum xaiv cov tshuab thiab khoom siv sib txawv yuav tsum tau coj mus rau hauv tus account, thiab cov cuab yeej siv tau kho cov feem ntawm cov khoom xyaw yuav tsum tau xaiv.
| Tus qauv | Muaj peev xwm (T / H) | Lub Hwj Chim (KW) | Ntsia Hlau Kab Ciam (Mm) | Qho hnyav |
| 75-B | 0.3-0.4 | 22 | 80 | 1000 |
| 85-B | 0.5-0.6 | 30 | 90 | 2000 |
| 90-B | 0.6-0.7 | 37 | 100 | 2100 |
| 100-B | 0.7-0.8 | 55 | 120 | 2200 |
| 135-B | 1-1.5 | 75 | 135 | 3200 |
| 145-B | 2-3 | 90 | 145 | 4000 |
| 160-B | 3-4 | 110 | 160 | 4500 |
| 175-B | 4-5 | 132 | 175 | 5000 |
Tom ntej no, xav txog kev ua kom muaj peev xwm ua tau ntawm cov khoom siv. Liaj teb ntawm qhov ntau thiab tsawg thiab tsawg cov cuab yeej siv nrog cov peev xwm sib txawv. Cov neeg ua liaj ua teb me me tsuas xav tau cov crushers me me thiab cov sib xyaw ua ke, thaum loj-teev kev lag luam yuav tsum tau ua tiav cov khoom siv nrog kev siv tshuab siab thiab ntau lawm. Ntsuas qhov koj xav tau thiab xaiv cov khoom siv uas phim nws, uas tsis tuaj yeem ntsib kev xav tau ntau lawm tab sis kuj tseem yuav zam cov chaw pov tseg tab sis kuj tseem yuav zam cov chaw pov tseg.
Tsis tas li ntawd, qhov tseeb ntawm pub cov khoom siv ua kuj tseem yog qhov tseem ceeb heev. Cov cuab yeej siv hluav taws xob siab tuaj yeem ua kom pom qhov tseeb ntawm pub lus piv, uas yog qhov tseem ceeb rau kev noj qab haus huv loj ntawm cov tsiaj txhu thiab yaj. Piv txwv li, lub zog tsis siv neeg tuaj yeem txo cov tib neeg ua yuam kev thiab xyuas kom meej ntawm cov as-ham.
Ib qho ntxiv, lub sijhawm ruaj khov thiab yooj yim ntawm kev tu yog yam kom txiav txim siab thaum yuav khoom siv cov khoom noj. Xaiv cov cuab yeej uas yog ruaj khov, yooj yim rau kev ua haujlwm tuaj yeem txo qis tsis tiav, txo cov nqi kho mob thiab txhim kho kev ua haujlwm thaum siv tau ntev.