It's many to replace a kind of pig advantage Along with the intensive exaltation of means for turning to raise pigs development and management for producing, the request of the manufacturer to the pigs quality is more and more high.At the same time, the pigs carry on the production of full burden under the control of the strict production plan and make natural selection and the proportion unusually eliminating have increment.The governor should control the renewal principle of a kind of pigs, the renewal in time grows a pig and lowers feeding cost. The renewal principle of one boar 1.1 natural selections Point the boar that will have already attained to use time limit(3~4 years) and go together with a kind of function decline to eliminate, also include because of the structure adjustment, species of production plan alteration, kinds seed selection but carry on having already aimed at to some individuals(community) in the boars sexual of eliminate. 1.2 abnormalities eliminate Pointing isn't appropriate because of feeding to manage in the production, use not reasonable, infection the disease or boar has the green prime of life boar that the many factors like congenital physiology blemish,etcs result in at don't drive well make use of circumstance under of eliminate.The reason that the boar unusually eliminates generally includes:Because the term Si isn't appropriate or on the sick list to result in the boar take part in to go together with to grow before the day food nourishment level not appropriate and spare boar body condition over fatty or lead thin, can not complete the whole a kind of process of going together with;Spare boar or is using of kind boar in a row a few check semen quality all performance dead Jing rate, the abnormal once led Gao, and descendant compatriot individual number less;In order to excessively lacking vitamin, and mineral...etc. to arouse boar sex gland in use or animal feed degeneration, sexual appetite muff, be disgusted with to go together with or refuse to go together with;From orchitis, attach burning or other diseases of Gaos to arouse boar physical endowment worse, sex function decline or lose;In order to exercise, going together with, kind or other reason result in boar limb the hoof hurt and didn't get a treatment in time;The boar isn't appropriate because of adjusting to teach separately, in the process of using in form evil habit, if bite a Dou sow, attack operation personnel etc.. The renewal principle of 2 sows 2.1 natural selections Will already arrive the sow of using the time limit(7~8 years) and hard maintenance normal production to eliminate.Because production plan change, lead a kind, change a kind and fall ill etc. reason, also want to eliminate to original production the function worse sow. 2.2 abnormalities eliminate The reason arousing sow to unusually eliminate in the production is a lot of, mainly including to breed a function obstacle and inheritting blemish, obstetrics disease, nourishment disease and limb the hoof is far-gone.To already to go together with a kind of day age and weight, but didn't express a period, passing to try methods like feeling,etc with the boar still can not make the individual that it is as usual in heat should eliminate;To produce Zi to break after the milk and pass a processing for 20 days still have never appeared to be in heat a performance or be in heat not obvious individual should eliminate;To because of feed manage not appropriate
once cause fatty or lead thin, passing the food structure of adjusting the day and strengthening to exercise still can not make its instauration grow functional sow should also eliminate;Didn't return a feeling phenomenon behind for going together with to grow, also have no gestation evidence, even exceed prepare to produce to expect don't give birth to baby as well, a few processings still can not be in heat the individual of going together with the kind as usual should early eliminate;Some numbers that are placed in to produce continuous 2~3 foetuseses of the sow that the high peak expectses to produce Zi all less, expel the factor of management, the confirmation is the reason of the sow, this kind of sow should eliminate;Although some sows produce Zi function better, Bi milk the dint is bad, continuous 2~3 foetuseses can not feed the baby pig produced as usual, and this kind of sow should eliminate;Some sow maternal instincts are bad, especially have the food Zi the evil habit, although producing the amount of Zis is many,producing the amount of Zis teaches lead the lowest, should determinedly eliminate. Source:Xinchang egg incubator www.incubatorforegg.com