农场猪饲料系数的确定方法

IF 1.7 4区农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY

Journal of Agricultural Science Pub Date : 2023-08-15 DOI:10.5539/jas.v15n9p117

V. L. Stass

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引用次数: 0

摘要

本研究的目的是找出一个只适用于农场猪的饲料系数公式。本研究采用猪杂交生长模型进行。这项研究中的动物生长模型并不先进，它发表在其他地方。本研究只使用了模型中必要的方程。饲料系数是一个复杂的特性。本文对常用的饲料换算系数公式进行了修正和变换。研究分析了饲料转化率的三个特点。区分这三个案例研究的原因是，在相同体重的猪中，在一个是生长动物而另一个达到最大体重的情况下，饲料系数不同。第一个案例研究涉及达到最大体重的猪。第二个案例研究涉及在有限体重范围内生长的动物。第三种是考虑一般情况;体重范围从断奶到最大体重。这项研究有三个结果。第一部分提出了猪达到最大体重时平均饲料系数的计算公式。第二个结果给出了生长动物在有限体重范围内的平均饲料系数公式。第三个结果给出了猪在30±6 kg体重范围内的平均饲料系数和最大体重的计算公式。

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A Method to Determine the Feed Conversion Coefficient in Farm Pigs

The aim of this study was to find out a formula for the feed conversion coefficient which is applicable solely to farm pigs. The study was performed by applying a hybrid model of growth of pigs. The model of growth of animals in this research was not advanced, it was published elsewhere. In this study only necessary equations of the model were used. Feed conversion coefficient is a complicated trait. In this research the usually used formula of feed conversion coefficient was revised and transformed. In the study three features of feed conversion were analysed. The reason to distinct the three case studies was that the feed conversion coefficient differs in the same weight pigs under condition that one is a growing animal but other reached its maximum weight. The first case study concerns pigs that reached their maximum weight. The second case study concerns growing animals in a limited weight range. Third one considers a general case; weight range from weaning up to maximum weight. There are three results in this study. The first one suggests a formula for the average feed conversion coefficient in pigs which reached their maximum weight. The second result suggests a formula of the average feed conversion coefficient for growing animals in a limited weight range. Third result suggests a formula of the average feed conversion coefficient for pigs in any weight range between 30 ± 6 kg, and maximum weight.

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来源期刊

Journal of Agricultural Science 农林科学-农业综合

CiteScore

2.80

自引率

5.00%

发文量

审稿时长

1.4 months

期刊介绍： The Journal of Agricultural Science publishes papers concerned with the advance of agriculture and the use of land resources throughout the world. It publishes original scientific work related to strategic and applied studies in all aspects of agricultural science and exploited species, as well as reviews of scientific topics of current agricultural relevance. Specific topics of interest include (but are not confined to): all aspects of crop and animal physiology, modelling of crop and animal systems, the scientific underpinning of agronomy and husbandry, animal welfare and behaviour, soil science, plant and animal product quality, plant and animal nutrition, engineering solutions, decision support systems, land use, environmental impacts of agriculture and forestry, impacts of climate change, rural biodiversity, experimental design and statistical analysis, and the application of new analytical and study methods (including genetic diversity and molecular biology approaches). The journal also publishes book reviews and letters. Occasional themed issues are published which have recently included centenary reviews, wheat papers and modelling animal systems.