叶绿醇是叶绿素分子支链，在反刍动物瘤胃内通过生物氢化作用后以游离态的存在，其再经过瘤胃微生物作用会生成植烷酸。这些植烷酸会随着代谢分布在瘤胃、血液中，参与代谢沉积到奶和肉中。植烷酸具有调节胰岛素，促进脂肪酸氧化的作用，对动物机体及畜产品对人体健康都具有积极影响。青绿饲料是反刍动物重要饲料来源，优质的青绿饲料不仅蛋白质，纤维等营养成分丰富且功能性物质，如植物光合色素含量也较为丰富。本专著特别着眼于植物光台色素中色素中的叶绿素，阐述了叶绿素含量在青绿饲料中的变化，分解及其对反刍动物的影响。

Introduction of phytol
1.Physical-chemical property ofphytol
2.Effects ofphytol on mice
3.Effects of phytol on finishing pigs
4.Effects ofphytol and its metabolites
Chapter 1 General introduction
1.1 General background
1.2 Photosynthetic pigments and phytol in herbages
1.3 Decomposition pathways of chlorophyll
1.4 Functional compounds in ruminant products
1.5 Objectives
Chapter 2 Changes of photosynthetic pigments and phytol in herbages
2.1 Changes of photosynthetic pigments and phytol content at different fertilization levels in fresh herbage and hay
2.2 Changes in carotenoid, chlorophyll and phytol contents in Italian ryegrass during ensiling
2.3 Effects of nitrogen fertilization and harvesting stage on photosynthetic pigments and phytol contents of Italian ryegrass silage
2.4 Effects of lactic acid bacteria addition on photosynthetic pigments of ensiled Italian ryegrass grown under different nitrogen fertilization levels
2.5 Changes of chlorophyll and phytol contents in different harvesting height King grass before and after ensiling
Chapter 3 Phytanic aicd production in the rumen
3.1 Effects of fertilization levels and harvesting stages of fresh herbages on ruminal phytanic acid production in vitro
3.2 Effects of fertilization levels and harvesting stages of Italian ryegrass silages on ruminal phytanic acid production in vitro
Chapter 4 Effect of forages sources on phytanic acid content in milk of dairy cows
4.1 Introduction
4.2 Materials and methods
4.3 Results
4.4 Discussion
Chapter 5 General discussion
5.1 Factors for the changes of photosynthetic pigments and phytol in herbages
5.2 Factors for the changes ofphytanic acid in the rumen
5.3 Factors on the changes ofphytanic acid content in milk
5.4 Conclusion
Chapter 6 General summary
References
Abbreviations