Menene mafi kyawun kewayon kiwo na lokacin kiwo?

Yanayin jikin shuka mai yana da alaƙa ta kud da kud da aikin sa na haifuwa, kuma kitsen baya shine mafi girman yanayin yanayin shuka kai tsaye.Wasu bincike sun nuna cewa aikin haifuwa na farkon tayin gilt yana da mahimmanci ga aikin haifuwa na gaba ɗaya, yayin da jijiyar gilt a lokacin lokacin kiwo yana da babban tasiri akan aikin haifuwa na tayin na farko.

Tare da haɓaka manyan sikelin da daidaita masana'antar alade, manyan gonakin alade sun fara amfani da na'urori masu ƙima don daidaita daidaitaccen kitse na shuka.A cikin wannan binciken, an ƙididdige ma'aunin kit ɗin baya na gilt da aikin farko da na ɗan tayi, don gano mafi kyawun kewayon kitsen baya na lokacin kiwo da samar da tushen ka'ida don jagorantar samar da gilt.

1 Kayayyaki da Hanyoyi

1.1 Tushen gwajin aladu

Gwada a Shanghai pudong sabon yanki da sikelin alade gonar, zabar daga Satumba 2012 zuwa Satumba 2013 game da 340 grams na gilt (Amurka zuriyar alade) a matsayin wani bincike abu, zabi a cikin shuka a lokacin da na biyu estrus, da kuma sanin backfat, da kuma na farko. zuriyar dabbobi, samarwa, nauyin gida, gida, ƙididdigan ƙididdiga na aikin haifuwa mai rauni (ban da rashin lafiya, bayanan da ba su cika ba).

1.2 Gwajin kayan aiki da hanyar ƙaddara

An yi ƙudiri ta amfani da kayan aikin B-superdiagnostic mai ɗaukar nauyi.Dangane da GB10152-2009, an tabbatar da daidaiton ma'auni na kayan aikin bincike na duban dan tayi na nau'in B (nau'in KS107BG).Lokacin aunawa, bari alade ya tsaya a hankali a hankali, kuma ya zaɓi kauri mai kauri mai kyau a tsaye (P2 point) a tsakiyar layin baya 5cm daga bayan alade a matsayin ma'aunin ma'auni, don guje wa karkatar da ma'aunin da baka ta baya ko ke haifarwa. durkushewar kugu.

1.3 Kididdigar bayanai

An fara sarrafa albarkatun ƙasa kuma an bincika su tare da tebur na Excel, sannan ANOVA tare da software na SPSS20.0, kuma duk bayanan an bayyana su azaman ma'anar ± daidaitaccen karkata.

2 Binciken sakamako

Teburin 1 yana nuna alaƙar da ke tsakanin kaurin baya da kuma aikin litter na gilts na farko.Dangane da girman zuriyar dabbobi, kitsen baya na kusan gram gilt a P2 ya kasance daga 9 zuwa 14 mm, tare da mafi kyawun aikin dattin daga 11 zuwa 12 m m.Daga ra'ayi na rayayyun datti, mai baya yana cikin kewayon 10 zuwa 13 mm, tare da mafi kyawun aiki a 12mm da 1 O live litter.35 Head.

Daga hangen nesa na jimlar nauyin gida, nauyin baya yana da nauyi a cikin kewayon 11 zuwa 14 mm, kuma ana samun mafi kyawun aikin a cikin kewayon 12 zuwa 13 m.Don ma'aunin datti, bambanci tsakanin ƙungiyoyin baya ba su da mahimmanci (P & gt; O.05), amma yayin da ya fi kauri, mafi girman matsakaicin nauyi.Daga ra'ayi na rashin nauyi mai rauni, lokacin da baya ya kasance a cikin 10 ~ 14mm, ƙananan nauyin nauyi yana ƙasa da 16, kuma yana da mahimmanci fiye da na sauran kungiyoyi (P & lt; 0.05), yana nuna cewa baya (9mm) da kuma yayi kauri sosai (15mm) zai haifar da ƙaruwa mai yawa a cikin ƙarancin nauyin shuka (P & lt; O.05).

3 Tattaunawa

Yanayin kitse na gilt yana ɗaya daga cikin mahimman alamomi don sanin ko ana iya daidaita shi.Nazarin ya nuna cewa shuki mai bakin ciki da yawa zai yi matukar tasiri ga ci gaban al'ada na follicles da ovulation, har ma yana shafar abin da aka makala amfrayo a cikin mahaifa, yana haifar da raguwar yawan mace-mace da yawan daukar ciki;kuma overfertilization zai haifar da rashin aiki na endocrin da rage matakin basal metabolism, don haka yana shafar estrus da mating na shuka.

Ta hanyar kwatanta, Luo Weixing ya gano cewa alamomin haifuwa na rukunin tsakiya gabaɗaya sun fi na rukunin masu kauri, don haka yana da matuƙar mahimmanci a kula da matsakaicin yanayin mai lokacin kiwo.Lokacin da Fangqin ta yi amfani da duban dan tayi na B don auna gilts 100kg, ta gano cewa kewayon kit ɗin da aka gyara tsakanin 11.OO ~ 11.90mm shine farkon (P & lt; 0.05).

Dangane da sakamakon, adadin piglets da aka samar a 1 O zuwa 14 mm, jimlar nauyin litter, nauyin kai da rashin ƙarfi sun kasance masu kyau, kuma an sami mafi kyawun aikin haifuwa a 11 zuwa 13 m m.Koyaya, bakin ciki na baya (9mm) kuma mai kauri (15mm) yakan haifar da raguwar aikin zuriyar dabbobi, nauyin littin (kai) da haɓaka ƙimar liti mai rauni, wanda kai tsaye yana haifar da raguwar ayyukan samar da gilts.

A cikin aikin samarwa, ya kamata mu fahimci yanayin baya na gilts akan lokaci, da daidaita yanayin kitse gwargwadon yanayin mai na baya.Kafin kiwo, yakamata a sarrafa shukar kiba a cikin lokaci, wanda ba zai iya adana farashin abinci kawai ba amma kuma yana haɓaka aikin kiwo na shuka;Lean shuka ya kamata a karfafa ciyar da sarrafa da kuma ciyar da lokaci, da kiba shuka har yanzu daidaita ko samun ci gaba retardation da dysplasia shuka ya kamata a kawar da wuri-wuri don inganta samar da aikin da kiwo amfanin dukan alade gona.