Ovulation rate is the principlefactor limiting litter size in gilts and increasing the level of feed intake prior to mating will significantly increase ovulation rate.
排卵率是限制母猪窝重的主要因子，在配种前提高采食量能显著性地增加排卵效率。
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By using principlefactor analysis, four dimensions were identified. They are the sense of time efficacy, the sense of time value, initiative in time using and time management strategy.
Results:Exploratory principlefactor analysis of the items indicated that the scale had two factors-striving for high goals and minding mistakes, explaining 51.6% of the total variance.