Loluphi olona luhlu lwe-backfat lwexesha lokuzala kwe-gilt?

Imeko ye-fat fat ihambelana ngokusondeleyo nokusebenza kwayo kokuzala, kwaye i-backfat yeyona nto ibonakalisa ngokuthe ngqo imeko yomzimba wemazi.Olunye uphononongo lubonise ukuba ukusebenza kokuzala komntwana wokuqala we-fetus kubalulekile kwintsebenzo yokuzala ye-parity elandelayo, ngelixa i-backfat ye-gilt ngexesha lokuzala inempembelelo enkulu ekusebenzeni komntwana wokuqala.

Ngophuhliso lomgangatho omkhulu kunye nomgangatho woshishino lweehagu, iifama ezinkulu zeehagu zaqala ukusebenzisa izixhobo ze-backfat ukulawula ngokuchanekileyo i-backfat yeehagu.Kolu phononongo, umlinganiselo we-backfat ye-gilt kunye nokusebenza kwenkunkuma yokuqala kunye ne-feetal litter yabalwa, ukuze kufunyanwe uluhlu olufanelekileyo lwe-backfat yexesha lokuzala kwe-gilt kunye nokubonelela ngesiseko sethiyori sokukhokela imveliso ye-gilt.

1 Izixhobo kunye neendlela

1.1 Umthombo weehagu zokulinga

Uvavanyo e Shanghai pudong indawo entsha ifama yehagu isikali, khetha ukususela ngoSeptemba 2012 ukuya kuSeptemba 2013 malunga 340 grams gilt (inzala yehagu American) njengento yophando, khetha kwimazi xa estrus yesibini, kwaye umisele backfat, kunye neyokuqala. inkunkuma, imveliso, ubunzima bendlwane, indlwane, ubungakanani obubuthathaka beenkcukacha-manani zedatha yokuzala (ngaphandle kwempilo enkenenkene, idatha engaphelelanga).

1.2 Izixhobo zovavanyo kunye nendlela yokumisela

Ukuzimisela kwenziwa ngokusebenzisa isixhobo esiphathwayo se-B-superdiagnostic esiphathwayo.Ngokutsho kwe-GB10152-2009, ukuchaneka kokulinganisa kwe-B-type ultrasound diagnostic instrument (uhlobo lwe-KS107BG) luqinisekisiwe.Xa ulinganisa, yiyeke ihagu ime izolile ngokwendalo, kwaye ukhethe ukutyeba okuthe tye okuthe nkqo kwe-backfat (P2 point) kumgca ongasemva we-5cm ukusuka ngasemva wehagu njengendawo yokulinganisa, ukunqanda ukutenxa komlinganiselo obangelwe kukungasemva okanye ukuwa esinqeni.

1.3 Iinkcukacha-manani

Idatha ekrwada yaqala yaqwalaselwa kwaye yahlalutywa ngeetafile ze-Excel, zilandelwa yi-ANOVA enesoftware ye-SPSS20.0, kwaye yonke idatha yachazwa njengentsingiselo ± ukutenxa okuqhelekileyo.

2 Uhlalutyo lweziphumo

Itheyibhile 1 ibonisa ubudlelwane phakathi kobunzima be-backfat kunye nokusebenza kwe-litter yokuqala yeegilts.Ngokumalunga nobukhulu be-litter, i-backfat malunga ne-gram gilt kwi-P2 isuka kwi-9 ukuya kwi-14 mm, kunye nokusebenza kakuhle kwe-litter ukusuka kwi-11 ukuya kwi-12 m m.Ukususela kumbono we-litter ephilayo, i-backfat yayikuluhlu lwe-10 ukuya kwi-13 mm, kunye nokusebenza kakuhle kwi-12mm kunye ne-1 O inkunkuma ephilayo.35 Intloko.

Ukususela kumbono wesisindo esipheleleyo sendlwane, i-backfat inzima kwi-11 ukuya kwi-14 mm, kwaye ukusebenza kakuhle kufezekiswa kuluhlu lwe-12 ukuya kwi-13 m.Kubunzima be-litter, umahluko phakathi kwamaqela e-backfat awubalulekanga (P & gt; O.05), kodwa okukhona ukuqina kwe-backfat, ubukhulu be-avareji ubunzima belitha.Ngokombono wezinga lobunzima obubuthathaka, xa i-backfat ingaphakathi kwe-10 ~ 14mm, izinga lobunzima elibuthathaka lingaphantsi kwe-16, kwaye liphantsi kakhulu kunamanye amaqela (P & lt; 0.05), ebonisa ukuba i-backfat (9mm) kunye ukutyeba kakhulu (15mm) kuya kubangela ukwanda okubonakalayo kumlinganiselo obuthathaka wobunzima beemazi (P & lt; O.05).

3 Ingxubusho

Imeko ye-fat condition of gilt yenye yezalathi ezibalulekileyo zokugqiba ukuba ingaba inokuhambelana.Uphononongo lubonise ukuba iimazi eziziimazi ezibhityileyo kakhulu ziya kuchaphazela ngokunzulu uphuhliso oluqhelekileyo lweefollicles kunye ne-ovulation, kwaye zide zichaphazele i-embryo attachment kwi-uterus, okukhokelela ekunciphiseni izinga lokukhwela kunye nesantya sokumitha;kunye nokugqithisa kuya kubangela ukungasebenzi kwe-endocrine kunye nokunciphisa izinga le-basal metabolism, ngaloo ndlela kuchaphazela i-estrus kunye nokukhwelana kweemazi.

Ngokuthelekisa, uLuo Weixing wafumanisa ukuba izalathi zokuzala zeqela eliphakathi zaziphezulu ngokubanzi kunezo zeqela elityebileyo le-backfat, ngoko ke kwakubaluleke kakhulu ukugcina imeko yamafutha ephakathi xa kuzalaniswa.Xa uFangqin esebenzisa i-B ultrasound ukulinganisa i-100kg gilts, wafumanisa ukuba uluhlu olulungisiweyo lwe-backfat phakathi kwe-11.OO~11.90mm yayiyeyona yakuqala (P & lt; 0.05).

Ngokweziphumo, inani lamantshontsho eehagu eziveliswe kwi-1 O ukuya kwi-14 mm, ubunzima be-litter bubonke, ubunzima bentloko ye-litter kunye ne-litter rate ebuthakathaka yayigqwesile, kwaye ukusebenza kakuhle kokuzala kufunyenwe kwi-11 ukuya kwi-13 m.Nangona kunjalo, i-backfat encinci (9mm) kunye ne-15mm enzima kakhulu (15mm) ihlala ikhokelela ekwehleni kokusebenza kwe-litter, i-litter (intloko) ubunzima kunye nokunyuka kwezinga le-litter elibuthathaka, elikhokelela ngokuthe ngqo ekwehleni kwemveliso ye-gilts.

Kwimveliso yokuvelisa, kufuneka sibambe kwangethuba imeko ye-backfat yeegilts, kwaye kwangethuba sihlengahlengise imeko yamafutha ngokwemeko yamafutha angasemva.Phambi kokuzala, iimazi ezityebileyo kufuneka zilawulwe kwangethuba, nto leyo engagcini nje ngokugcina iindleko zesondlo kodwa iphucule nendlela yokuzala kweemazi;Iimazi ezibhityileyo kufuneka zomeleze ulawulo lokutya kunye nokutyisa ngexesha, kwaye iimazi ezityebileyo zisalungelelanisa okanye zinengxaki yokukhula kwaye iimazi zeehagu ze-dysplasia kufuneka zipheliswe ngokukhawuleza ukuze kuphuculwe ukusebenza kwemveliso kunye nenzuzo yokuzala kwayo yonke ifama yehagu.