后备母猪

从进入繁殖群到配种，最必需的是用后备母猪专用料并采用自由采食方式来饲喂后备母猪。

All that will be required will be to feed a gilt developer diet ad libitum from arrival in the breeding herd until mating .

选用太湖后备母猪70头为试验组.40头大白猪为对照组。

70 Taihu gilts were selected as experiment group , and 40 large-white pigs as control one .

对大多数品种的后备母猪来说没必要故意设法想改变其身体组分。

For most genotypes of gilts there is no need to do anything special to manipulate body composition .

能量水平和来源对后备母猪血液代谢产物、激素分泌及卵泡液成分的影响

Effects of Dietary Energy Level and Source on Blood Metabolites , Hormone Secretion and Follicular Fluid Composition in Gilts

本文包括两个试验，分别研究了提高能量浓度对后备母猪和哺乳母猪的影响。

This article includes two tests , which the effect of increasing energy density on the back-up sows and lactating sows .

本文旨在综述后备母猪、妊娠母猪、泌乳母猪及断奶&再配种间隔期母猪的营养与饲养管理方面的研究新进展。

Recent research advances in nutrition and feeding management of replacement gilts , gestating , lactating , and dry sows were reviewed in this article .

母猪繁殖障碍覆盖了所有种猪场，后备母猪不发情率约为8.2%，产死胎、木乃伊、弱仔的母猪占繁殖母猪的21%左右；

Sow reproductive disorders occurred in all the investigated pig farms with 8.2 % of non-estrous rate and 21 % approximately of sows producing dead embryo , mummy foetus or weak piglet in all reproductive sows .

将试制疫苗接种妊娠母猪、后备母猪及Balb/C小鼠，接种后试验动物采食生长正常，无异常反应，妊娠母猪无流产、产死胎和木乃伊胎的记录。

The test animals ( pregnant sows , gilts and BALB / c mice ) showed no abnormal reaction after inoculated with the vaccine and pregnant sows showed no abortion , stillbirth , or records of mummified .

对青年母猪（大×长）繁殖力的调查表明：①后备母猪的发情率为71.98%，情期受胎率为84.18%，生理性乏情率为22.80%。

The investigation of the reproductivity from hybrid gilts ( Yorkshire Landrace ) indicated that the estrus rate , conception rate and physiological anestrous rate in gilts was 71.98 % , 84.18 % and 22.80 % respectively .

显而易见，脂肪和瘦肉都是保持良好繁殖性能必须的体组织，同时也是后备母猪饲喂目标：控制青年母猪的体组成，确保初配时有脂肪和瘦肉沉积。

What is becoming evident is that both fat and lean are essential tissues for reproduction and the objective of the feeding program for replacement gilts should be to manipulate the body composition of the gilt to ensure that adequate reserves of these tissues are present at first mating .

结果表明：1.雅南猪后备公、母猪的增重高峰为45月龄，生长育肥猪的生长高峰为78月龄。

The results are shown as follows : 1 . Replacement males and females reach their growth summit at the age of 4-5 months , and finishing pigs , at 7-8 months .