Ndeipi yakanakisa backfat mhando yenguva yekuberekesa gilt?

Dyara mamiriro emuviri wemafuta ane hukama zvakanyanya nekuita kwayo kubereka, uye backfat ndiyo inonyanya kuratidza ye sow body mamiriro.Zvimwe zvidzidzo zvakaratidza kuti kubereka kwekutanga kwe "fetus of gilt" kwakakosha pakuita kubereka kweiyo inotevera parity, nepo backfat yegilt panguva yekuberekesa ine simba guru pakuita kubereka kwekutanga "fetus".

Nekuvandudzwa kwehukuru-hukuru uye kumira kweindasitiri yenguruve, mapurazi makuru enguruve akatanga kushandisa backfat midziyo kuti inyatso gadzirisa backfat yenguruve.Muchidzidzo ichi, kuyerwa kwebackfat yegilt uye yekutanga uye fetal litter performance yakaverengerwa, kuitira kuti tiwane yakakwana yebackfat yenguva yekuberekesa gilt uye nekupa hwaro hwekufungidzira hwekutungamira kugadzirwa kwegilt.

1 Zvishandiso uye Nzira

1.1 Kunobva nguruve dzekuyedza

Muedzo muShanghai pudong nzvimbo itsva chikero nguruve purazi, sarudza kubva September 2012 kusvika September 2013 anenge 340 magiramu gilt (American nguruve vazukuru) sechinhu tsvakurudzo chinhu, sarudza munguruve apo yechipiri estrus, uye kuziva backfat, uye wokutanga. marara, kugadzirwa, huremu hwedendere, dendere, uwandu husina kusimba hwekubereka hwekuita data (tisingasanganisire hutano husina kunaka, data isina kukwana).

1.2 Midziyo yekuyedza uye nzira yekusimbisa

Kutsunga kwakaitwa uchishandisa inotakurika multifunctional B-superdiagnostic chiridzwa.Zvinoenderana neGB10152-2009, kuyerwa kwechiyero cheB-mhando ultrasound diagnostic chiridzwa (mhando KS107BG) inosimbiswa.Pakuyera, rega nguruve imire chinyararire, uye sarudza iyo chaiyo vertical backfat ukobvu (P2 point) kumashure midline 5cm kubva kumashure kwenguruve seyeyero nzvimbo, kudzivirira kutsauka kwechiyero kunokonzerwa neshure kana uta. kudonha kwechiuno.

1.3 Data nhamba

Data mbishi yakatanga kugadziridzwa nekuongororwa nematafura eExcel, ichiteverwa neANOVA ine SPSS20.0 software, uye data rese rakaratidzwa sezvinoreva ± kutsauka kwakajairwa.

2 Migumisiro yekuongorora

Tafura 1 inoratidza hukama pakati pebackfat gobvu uye kuita kwekutanga litter yemagilts.Panyaya yekukura kwemarara, iyo backfat yeanenge giramu gilt paP2 kubva pa9 kusvika 14 mm, ine yakanakisa kuita kwemarara kubva pa11 kusvika 12 m m.Kubva pakuona kwemarara mhenyu, backfat yakanga iri pakati pe10 kusvika ku13 mm, nekushanda kwakanakisisa pa 12mm uye 1 O live litter.35 Head.

Kubva pakuona kwehuremu hwedendere, backfat inorema muhuwandu hwe11 kusvika ku14 mm, uye kushanda kwakanakisisa kunowanikwa muhuwandu hwe12 kusvika ku13 m m.Pazviremu zvemarara, mutsauko pakati pemapoka ebackfat hauna kukosha (P & gt; O.05), asi kukora kwebackfat, ndiko kukura kweavhareji.Kubva pakuona kwehuremu husina simba, kana backfat iri mukati me10 ~ 14mm, iyo isina simba inorema iri pasi pe16, uye yakanyanya kuderera kupfuura yemamwe mapoka (P & lt; 0.05), zvichiratidza kuti backfat (9mm) uye yakanyanya kukora (15mm) ichakonzera kuwedzera kwakakosha kwehuremu huremu hwemhodzi (P & lt; O.05).

3 Kukurukurirana

Mamiriro emafuta mamiriro egilt ndechimwe chezviratidzo zvakakosha kuona kana inogona kuenzaniswa.Zvidzidzo zvakaratidza kuti mbesa dzakatetepa zvakanyanya dzinokanganisa zvakanyanya kukura kwefollicles uye ovulation, uye kunyange kukanganisa "embryo attachment" muchibereko, zvichikonzera kuderedzwa kwekusangana uye kubata pamuviri;uye overfertilization inotungamira mukusashanda zvakanaka kwe endocrine uye kuderedzwa mwero webasal metabolism, zvichikanganisa estrus uye kusangana kwenguruve.

Kuburikidza nekuenzanisa, Luo Weixing akawana kuti zviratidzo zvekubereka zveboka repakati kazhinji zvaive zvakakwirira pane izvo zveboka rebackfat gobvu, saka zvaive zvakakosha kuchengetedza mafuta ari pakati nepakati pakuzvara.Fangqin paakashandisa B ultrasound kuyera 100kg gilts, akaona kuti yakagadziriswa backfat range iri pakati pe11.OO~11.90mm ndiyo yaive yekutanga (P & lt; 0.05).

Zvinoenderana nemhedzisiro, huwandu hwenguruve hwakagadzirwa pa1 O kusvika 14 mm, huremu hwemarara, huremu hwemusoro uye husina simba hwemarara hwaive hwakanakisa, uye kuita kwakanakisa kubereka kwakawanikwa pa11 kusvika 13 m m.Zvisinei, musana wakaonda (9mm) uye wakanyanyisa (15mm) unowanzoita kuti kuderera kwemararamiro emarara, marara (musoro) uremu uye kuwedzera simba risina simba remarara, izvo zvinotungamirira zvakananga kuderera kwekugadzirwa kwegilts.

Muchiito chekugadzira, isu tinofanirwa kubata panguva iyo backfat mamiriro egilts, uye nenguva gadzirisa mamiriro emafuta zvinoenderana neiyo kumashure mafuta mamiriro.Kusati kwaberekesa, nguruve dzakafuta dzinofanira kudzorwa nenguva, izvo zvisingangogone kuchengetedza mutengo wekudya chete asiwo kuvandudza kubereka kwenguruve;Mbeu dzakaonda dzinofanira kusimbisa kutarisira kwekudya uye kudya panguva yakakodzera, uye mbesa dzakafuta dzichiri kugadzirisa kana kuva nekukura kwekukura uye dysplasia inodyara inofanira kubviswa nokukurumidza sezvinobvira kuvandudza kushanda kwekugadzira uye kubereka kubatsirwa kwepurazi rose renguruve.