{"title":"农场猪饲料系数的确定方法","authors":"V. L. Stass","doi":"10.5539/jas.v15n9p117","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":14884,"journal":{"name":"Journal of Agricultural Science","volume":"1 1","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Method to Determine the Feed Conversion Coefficient in Farm Pigs\",\"authors\":\"V. L. Stass\",\"doi\":\"10.5539/jas.v15n9p117\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"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.\",\"PeriodicalId\":14884,\"journal\":{\"name\":\"Journal of Agricultural Science\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2023-08-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Agricultural Science\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.5539/jas.v15n9p117\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"AGRICULTURE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Agricultural Science","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.5539/jas.v15n9p117","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRICULTURE, MULTIDISCIPLINARY","Score":null,"Total":0}
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.
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.
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