He aha ke ʻano o ka momona hope maikaʻi loa o ka wā hānau gilt?

ʻO ke kūlana o ke kino momona e pili kokoke ana i kāna hana hānau, a ʻo ka backfat ka hōʻike pololei loa o ke kūlana kino lūlū.Ua hōʻike ʻia kekahi mau haʻawina he mea nui ka hana hānau ʻana o ka pēpē mua o ka gilt i ka hana hānau o ka parity hope, ʻoiai ʻo ka backfat o ka gilt i ka wā o ka hānau ʻana he hopena nui i ka hana hānau o ka pēpē mua.

Me ka hoʻomohala ʻana i ka nui a me ka hoʻohālikelike ʻana i ka ʻoihana puaʻa, ua hoʻomaka nā māla puaʻa nui e hoʻohana i nā mea hana backfat e hoʻoponopono pono i ka backfat o nā lūlū.Ma kēia haʻawina, ua helu ʻia ke ana ʻana o ka momona hope o ka gilt a me ka hana mua a me ka fetal litter, i mea e ʻike ai i ke ʻano o ka momona hope maikaʻi loa o ka wā hānau gilt a hāʻawi i kumu kumu no ke alakaʻi ʻana i ka hana gilt.

1 Mea a me na Hana

1.1 Puna o nā puaʻa hoʻokolohua

Hoao ma Shanghai pudong hou wahi he unahi puaʻa mahiʻai, e koho mai September 2012 a September 2013 e pili ana i 340 grams o gilt (American puaʻa mamo) e like me ka noiʻi mea, koho i loko o ka lulu i ka wā o ka lua estrus, a hoʻoholo i ka backfat, a me ka mua. ʻōpala, hana ʻana, kaumaha pūnana, pūnana, ʻikepili ʻikepili hana hānau hānau nui (koe ʻole ke olakino maikaʻi ʻole, ka ʻikepili piha ʻole).

1.2 Mea hoʻāʻo a me ke ʻano hoʻoholo

Ua hana ʻia ka hoʻoholo ʻana me ka hoʻohana ʻana i kahi mea hana B-superdiagnostic multifunctional.Wahi a GB10152-2009, hōʻoia ʻia ka pololei o ke ana ʻana o ka mea hana diagnostic ultrasound type B (type KS107BG).I ke ana ana, e ku malie ka puaa, a e koho i ka manoanoa o ka momona hope (P2 point) ma ka laina waena hope 5cm mai ke kua o ka puaa ke kiko ana, e pale aku ai i ke ana o ke ana ma ke kakaka hope. hāʻule pūhaka.

1.3 Helu helu

Ua hoʻoponopono mua ʻia nā ʻikepili maka me nā papa Excel, a ukali ʻia e ANOVA me SPSS20.0 lako polokalamu, a ua hōʻike ʻia nā ʻikepili āpau e like me ka mean ± standard deviation.

2 Nā hualoaʻa loiloi

Hōʻike ka papa 1 i ka pilina ma waena o ka mānoanoa backfat a me ka hana ʻana o ka litter mua o nā gilts.Ma ke ʻano o ka nui o ka litter, ʻo ka momona hope o kahi gram gilt ma P2 mai ka 9 a 14 mm, me ka hana litter maikaʻi loa mai ka 11 a 12 m m.Mai ka manaʻo o ka litter ola, ka backfat aia ma ka laulā o 10 a 13 mm, me ka hana maikaʻi loa ma 12mm a me 1 O litter ola.35 Head.

Mai ka hiʻohiʻona o ka nui o ke kaumaha o ka pūnana, ʻoi aku ke kaumaha o ka backfat ma ka laulā o 11 a 14 mm, a loaʻa ka hana maikaʻi loa ma ka laulā o 12 a 13 m m.No nā paona litter, ʻaʻole i koʻikoʻi ka ʻokoʻa ma waena o nā hui backfat (P & gt; O.05), akā ʻo ka mānoanoa o ka momona hope, ʻoi aku ka nui o ka awelika o ke kaumaha.Mai ka hiʻohiʻona o ka nawaliwali ka nui o ke kaumaha, i ka wā o ka backfat i loko o 10 ~ 14mm, ka nawaliwali kaumaha helu ma lalo o 16, a he nui loa haʻahaʻa ma mua o nā hui 'ē aʻe (P & lt; 0.05), e hōʻike ana i ka backfat (9mm) a ʻO ka mānoanoa loa (15mm) ka mea e hoʻonui nui ai i ke kaumaha nāwaliwali o nā lūlū (P & lt; O.05).

3 Kūkākūkā

ʻO ke kūlana momona o ka gilt kekahi o nā hōʻailona koʻikoʻi e hoʻoholo ai inā hiki ke hoʻohālikelike ʻia.Ua hōʻike ʻia nā haʻawina e pili nui ana nā lūlū lahilahi i ka hoʻomohala maʻamau o nā follicles a me ka ovulation, a hiki i ka hoʻopili ʻana i ka embryo attachment i loko o ka ʻōpū, ka hopena o ka hoʻemi ʻana i ka nui o ka male a me ka nui o ka hāpai ʻana;A ʻo ka overfertilization e alakaʻi i ka endocrine dysfunction a me ka emi ʻana o ke kiʻekiʻe o ka metabolism basal, no laila e pili ana i ka estrus a me ka male ʻana o nā lūlū.

Ma o ka hoʻohālikelike ʻana, ua ʻike ʻo Luo Weixing ua ʻoi aku ka kiʻekiʻe o nā hōʻailona hānau o ka hui waena ma mua o nā pūʻulu mānoanoa backfat, no laila he mea nui ka mālama ʻana i ke kūlana momona i ka wā e hānau ai.I ka wā i hoʻohana ai ʻo Fangqin i ka ultrasound B e ana i nā gilts 100kg, ua ʻike ʻo ia i ka hoʻoponopono ʻia ʻana o ka momona hope ma waena o 11.OO~11.90mm ka mea mua loa (P & lt; 0.05).

Wahi a nā hualoaʻa, maikaʻi loa ka helu o nā puaʻa i hana ʻia ma 1 O a 14 mm, ka nui o ka litter paona, ka litter head weight a me ka litter litter rate maikaʻi loa, a ua loaʻa ka hana hānau hānau maikaʻi loa ma 11 a 13 m m.Eia nō naʻe, ʻo ka momona hope lahilahi (9mm) a me ka mānoanoa loa (15mm) ke alakaʻi pinepine nei i ka emi ʻana o ka hana litter, litter (poʻo) kaumaha a hoʻonui i ka litter litter rate, e alakaʻi pololei ana i ka emi ʻana o ka hana hana o nā gilts.

I ka hoʻomaʻamaʻa hana, pono mākou e hopu i ke kūlana backfat o nā gilts, a hoʻoponopono pono i ke kūlana momona e like me ke kūlana momona hope.Ma mua o ka hoʻouluʻana, pono e hoʻomaluʻia nā lūlū momona i ka manawa,ʻaʻole hiki ke mālama wale i ke kumukūʻai hānai akā e hoʻonui i ka hana hānau o nā lūlū;Pono nā lūlū lean e hoʻoikaika i ka mālama ʻana i ka hānai ʻana a me ka hānai ʻana i ka manawa, a ʻo nā lūlū momona ke hoʻololi a i ʻole ka ulu ʻana o ka ulu ʻana a me nā lūlū dysplasia e hoʻopau koke ʻia e hoʻomaikaʻi i ka hana hana a me ka pōmaikaʻi hānau o ka māla puaʻa holoʻokoʻa.