期刊论文

The Study on the Change in Feed Intake and Black Fat Thickness of Lactating Sows

中文

华北农学报

1000-7091

2009

24

B08

278-280

基金项目：国家自然科学基金资助项目（30700579） 湖南省科技厅基础研究资助项目（2008FJ3047）

本校为第一机构

选用15头胎次、预产期近似，品种一致的经产大白母猪，考察了一个哺乳期内母猪背膘厚度和采食量的变化。研究发现：采食量与背膘厚度在哺乳期内都呈二次曲线变化，即Y（采食量，kg）=-2．3056x2＋24．239x-20．417与y（背膘厚度，nun）=-0．0714x2-0．4x＋19．107。哺乳期采食量与母猪哺乳期的失重存在显著负相关（P〈0．05），哺乳期各阶段采食量与母猪背膘厚度呈明显的线性负相关（P〈0．1），回归方程为y（背膘厚度，mm）=19．876—0．085X。上述结果表明，以哺乳阶段为自变量建立回归方程预测采食量的准确性要优于背膘厚度，通过采食量预测背膘厚度也可取得较满意的结果。

Fifteen Yorkshire lactating sows were used to investigate the change in feed intake and black fat thickness of lactating sows in a whole lactation period. The result showed that the feed intake and black fat thickness were increased quadratically with increased lactation phase. The feed intake of sows in lactation period was correlated negatively with its black fat thickness（ P 〈 0.05）. From what discussed above, the result indicated that the accuracy would be better when the lactation phase was regarded as independent variable to build regr...