Dab tsi yog qhov zoo tshaj plaws backfat ntau ntawm lub sijhawm yug me nyuam gilt?

Sow fatty body condition is closely related to its reproductive performance, and backfat is the most direct reflection of sow lub cev mob.Qee cov kev tshawb fawb tau pom tias kev ua me nyuam ntawm thawj tus menyuam hauv plab ntawm gilt yog qhov tseem ceeb rau kev ua haujlwm ntawm cov menyuam hauv plab tom qab, thaum lub sij hawm rov qab ntawm gilt thaum lub sij hawm yug me nyuam muaj kev cuam tshuam zoo rau kev ua me nyuam ntawm thawj fetus.

Nrog rau txoj kev loj hlob ntawm loj-scale thiab standardization ntawm npua kev lag luam, loj-scale npua teb pib siv backfat apparatus kom raug tswj cov backfat ntawm sows.Nyob rau hauv txoj kev tshawb no, kev ntsuas backfat ntawm lub gilt thiab thawj thiab fetal litter kev ua tau zoo raug xam, thiaj li nrhiav tau qhov zoo tshaj plaws backfat ntau ntawm lub sij hawm yug me nyuam gilt thiab muab lub hauv paus theoretical rau kev coj cov gilt ntau lawm.

1 Cov ntaub ntawv thiab cov txheej txheem

1.1 Qhov chaw ntawm kev sim npua

Kev ntsuam xyuas hauv Shanghai pudong thaj chaw tshiab thaj chaw npua teb, xaiv lub Cuaj Hlis 2012 txog Lub Cuaj Hli 2013 txog 340 grams ntawm gilt (American npua xeeb leej xeeb ntxwv) raws li cov khoom tshawb fawb, xaiv nyob rau hauv cov noob thaum lub thib ob estrus, thiab txiav txim siab lub backfat, thiab thawj. litter, ntau lawm, zes qhov hnyav, zes, tsis muaj zog loj me nyuam cov ntaub ntawv txheeb cais (tsis suav nrog kev noj qab haus huv, cov ntaub ntawv tsis tiav).

1.2 Cov cuab yeej ntsuas thiab kev txiav txim siab

Kev txiav txim siab tau ua los ntawm kev siv lub tshuab ua haujlwm multifunctional B-superdiagnostic.Raws li GB10152-2009, kev ntsuas qhov tseeb ntawm B-hom ultrasound diagnostic instrument (hom KS107BG) raug txheeb xyuas.Thaum ntsuas, cia tus npua sawv ntsiag to, thiab xaiv txoj cai ntsug backfat thickness (P2 point) ntawm sab nraub qaum midline 5cm los ntawm sab nraub qaum ntawm tus npua raws li qhov ntsuas ntsuas, kom tsis txhob muaj qhov sib txawv ntawm qhov ntsuas los ntawm sab nraub qaum lossis lub duav plab.

1.3 Cov ntaub ntawv txheeb cais

Cov ntaub ntawv nyoos yog thawj zaug ua tiav thiab tshuaj xyuas nrog Excel cov lus, ua raws li ANOVA nrog SPSS20.0 software, thiab tag nrho cov ntaub ntawv tau qhia tias txhais tau tias ± tus qauv sib txawv.

2 Kev txheeb xyuas qhov tshwm sim

Table 1 qhia txog kev sib raug zoo ntawm backfat thickness thiab kev ua tau zoo ntawm thawj litter ntawm gilts.Nyob rau hauv cov nqe lus ntawm litter loj, lub backfat ntawm txog gram gilt ntawm P2 ranged ntawm 9 mus rau 14 mm, nrog rau qhov zoo tshaj plaws litter ua tau zoo li ntawm 11 mus rau 12 m m.Los ntawm qhov pom ntawm cov litter nyob, lub backfat yog nyob rau hauv thaj tsam ntawm 10 mus rau 13 hli, nrog rau kev ua tau zoo tshaj plaws ntawm 12mm thiab 1 O nyob litter.35 Lub taub hau.

Los ntawm qhov kev xav ntawm tag nrho lub zes qhov hnyav, lub nraub qaum yog hnyav dua nyob rau hauv thaj tsam ntawm 11 txog 14 hli, thiab qhov kev ua tau zoo tshaj plaws yog ua tiav nyob rau hauv thaj tsam ntawm 12 txog 13 m m.Rau cov khib nyiab hnyav, qhov sib txawv ntawm cov pab pawg backfat tsis tseem ceeb (P & gt; O.05), tab sis qhov tuab ntawm cov backfat, qhov loj dua qhov nruab nrab litter hnyav.Los ntawm qhov kev xav ntawm qhov tsis muaj zog qhov hnyav, thaum lub backfat nyob rau hauv 10 ~ 14mm, qhov tsis muaj zog qhov hnyav yog qis dua 16, thiab yog qhov qis dua li ntawm lwm pab pawg (P & lt; 0.05), qhia tias backfat (9mm) thiab tuab heev (15mm) yuav ua rau muaj kev nce ntxiv ntawm qhov tsis muaj zog ntawm cov noob qoob loo (P & lt; O.05).

3 Kev sib tham

Cov mob rog rog ntawm gilt yog ib qho ntawm cov cim tseem ceeb los txiav txim seb nws puas tuaj yeem sib phim.Cov kev tshawb fawb pom tau hais tias nyias nyias nyias yuav cuam tshuam rau kev loj hlob ntawm cov hauv paus hniav thiab ovulation, thiab txawm cuam tshuam rau lub embryo txuas hauv tsev menyuam, uas ua rau txo qis mating tus nqi thiab conception tus nqi;thiab overfertilization yuav ua rau endocrine tsis ua hauj lwm thiab txo cov theem ntawm basal metabolism, yog li cuam tshuam estrus thiab mating ntawm sows.

Los ntawm kev sib piv, Luo Weixing pom tias qhov ntsuas kev ua me nyuam ntawm cov pab pawg nruab nrab feem ntau siab dua li cov pawg backfat tuab, yog li nws yog ib qho tseem ceeb heev uas yuav tsum tswj kom muaj roj tsawg thaum yug me nyuam.Thaum Fangqin siv B ultrasound los ntsuas 100kg gilts, nws pom tias qhov kho rov qab muaj qhov sib txawv ntawm 11.OO ~ 11.90mm yog qhov ntxov tshaj plaws (P & lt; 0.05).

Raws li qhov tshwm sim, tus naj npawb ntawm piglets tsim ntawm 1 O mus rau 14 hli, tag nrho qhov hnyav litter, lub taub hau hnyav thiab cov khib nyiab tsis muaj zog tau zoo heev, thiab qhov kev ua tau zoo tshaj plaws tau txais ntawm 11 mus rau 13 m m.Txawm li cas los xij, nyias backfat (9mm) thiab tuab heev (15mm) feem ntau ua rau kev poob qis ntawm cov khib nyiab, cov khib nyiab (lub taub hau) qhov hnyav thiab nce cov khib nyiab tsis muaj zog, uas ncaj qha ua rau kev poob qis ntawm kev ua haujlwm ntawm gilts.

Nyob rau hauv kev xyaum ntau lawm, peb yuav tsum tau raws sij hawm tuav lub backfat qhov teeb meem ntawm gilts, thiab raws sij hawm kho cov rog qhov teeb meem raws li lub rov qab rog.Ua ntej yug me nyuam, overweight sows yuav tsum tau tswj nyob rau hauv lub sij hawm, uas tsis tsuas yog txuag tus nqi pub tab sis kuj txhim kho kev yug me nyuam ntawm sows;lean sows yuav tsum ntxiv dag zog rau kev tswj hwm kev noj zaub mov thiab kev noj zaub mov kom raws sijhawm, thiab cov noob qoob loo hnyav tseem kho lossis muaj kev loj hlob qeeb thiab dysplasia sows yuav tsum raug tshem tawm sai li sai tau txhawm rau txhim kho kev tsim khoom thiab kev yug me nyuam ntawm tag nrho cov npua ua liaj ua teb.