what are some common misconceptions about mating? did you fall for it?-龙8官网app下载地址

yesterday, xiaobian sorted out the sows breeding related skills, received everyone's unanimous praise, have said did not see enough! so, today xiaobian strike while the iron is hot, and sort out the common breeding mistakes, for everyone to learn to communicate!
want to match good breed, besides master certain skill outside, want to avoid a few misunderstanding even, avoid risk as far as possible, do not pass any opportunity that promotes pig farm production benefit!
please have a look at --

myth 1: mating with only one bag, or even a bag with two ends

some pig breeders think that sows only need to be mated when they are in heat, or empiricism is in the first place, which is how they were mated before, so there is no problem with such a mating, and even some people think that it is the most economical... in fact, this kind of operation mode or idea has the extremely erroneous zone, this is lacks the scientific mating knowledge, takes the accidental as the inevitable, does not know calculates the economic account the typical performance.

the number of piglets in a litter depends on the number of ovulation, the fertilisation rate of eggs and the survival rate of embryos. the relationship between ovulation number, variety and number of fetuses was obvious. the fertilized rate of eggs is related to the quality of sows' eggs, the quality of boars' semen and the timing of mating. aging of the gamete (either egg or sperm) reduces the survival rate of the embryo.

in fact, multiple mating, through the repeated stimulation in the mating process, can constantly cause the nerve reflex of the sow, can make the sow endocrine system secrete a hormone that can accelerate ovulation, accelerate ovulation maturation, resulting in early ovulation or supplementary ovulation.

in order to increase the litter number of sows as far as possible, it is necessary to achieve timely breeding and improve the rate of conception in estrus. if master to rutting period not to allow or miss optimal mating opportunity, not only very difficult to succeed in mating, even if matched, litter number is very small. in production practice, it is not easy to accurately grasp the peak ovulation period of sows. in order to increase the chances of conception of sows, multiple mating methods can be used to increase the number of live sperm in the womb during estrus and improve the pregnancy rate of sows during estrus. the results show that the effect is significant.

error 2: the pig essence of the second day is not fresh, use effect is poor

the height of seminal fluid quality basically is to see spermatozoa vigor and the quantity of abnormal spermatozoa. when sperm motility exceeds 60 percent, fecundity and fertility are no longer affected by sperm motility. therefore, it is not accurate to judge whether pig essence is "fresh" simply by "days".

myth 3: only keep seeds to use high-grade pig essence

the use of high-grade pig essence for seed retention indicates that pig farmers have realized the importance of improving sow varieties for commercial pig production, and that the use of high-grade pig essence can improve the performance of future generations. however, when commodity production was carried out, the importance of high-grade pig essence for breed improvement was neglected. only when the performance of boars and sows was good, the performance of offspring would be better. among several key factors affecting the efficiency of pig breeding, the input of breed improvement can achieve the effect of one input and ten output, so whether the production of breeding pigs or commercial pigs using high-grade pig essence to improve the performance of future generations is worthwhile.

myth 4: sows give birth to little pig sperm is the problem

the amount of litter a sow gives birth to, in addition to being related to pig sperm, is also largely determined by the sow.
breed: sow breed ability is low, maternal sex is bad, close relatives is easy to cause sow to give birth to a few young.

age: premature breeding (low body mass, backfat not up to standard) of primary sows will lead to less litter; when they are too old, the overproduction and low management level of 6-8 fetal sows will lead to the premature reduction of reproductive performance of sows and the reduction of litter number.

feed: feed the sows moldy and deteriorated feed, unreasonable early feeding after breeding, poor health condition of sows in childbirth, early weaning of the last litter, vitamin a and niacin deficiency and other reasons, are easy to affect the litter number of sows.

feeding management: pre-breeding management: reserve sows have too little mating weight and too little age of months; the condition of the sows before breeding was not well controlled, and the reserve sows were not fed with limited feeding, which resulted in too large and too fat breeding and reduced litter number. there was no short-term optimal feeding for backup pigs and weaning sows before breeding; unreasonable feeding amount during pregnancy leads to less litter; estrus identification, inappropriate breeding timing, improper boar feeding management, environmental stress in early pregnancy, etc.

other reasons: unreasonable vaccination time: resulting in less litter. sows in the early and late stages of pregnancy, less vaccine, reduce various stress, promote fetal safety and fetal growth.

myth 5: sows give birth to weak young, uneven size is caused by the pig fine

if the proportion of weak offspring is large and stillbirth occurs, diseases such as swine fever, blue-ear disease and feed problems should be considered. give birth to the proportion of weak young is not big, want to consider breeder feed material operation problem.

in general, the control of weakling is mainly from the aspects of immunity, health care, feeding management and environmental control, with the focus on ensuring good health condition of pregnant sows, ensuring reasonable distribution and supply of nutrition, ensuring fetal development and reducing weakling.

other reasons: unreasonable vaccination time: resulting in less litter. sows in the early and late stages of pregnancy, less vaccine, reduce various stress, promote fetal safety and fetal growth.