动物营养学报2019，Vol.31Issue(9)：4208-4217,10.DOI:10.3969／j.issn.1006⁃267x.2019.09.034
不同刈割高度王草中叶绿素和叶绿醇含量在青贮前后的变动
Changes of Chlorophyll and Phytol Contents in Different Harvesting Height King Grass before and after Ensiling
摘要
Abstract
The aims of this study were to explore the changes of chlorophyll and phytol contents in king grass [ Pennisetum purpureum Schumacher×Pennisetum glaucum ( Linnaeus) R. Brown] before and after ensiling which was harvested at different heights, and to investigate the relation between the chlorophyll and phytol con?tents and fermentation quality in king grass silage. For the study, four experimental fields were prepared and each experimental field consisted of four plots. The king grass from one of the four plots was harvested at the height of 50 to 80 cm ( T1) , 80 to 120 cm ( T2) , 120 to 180 cm ( T3) and 180 to 220 cm ( T4) , respective?ly. Normally, the king grass was naturally dried to be about 80% moisture, then cut to 2 cm and fermented for 60 days for preparing the silage. pH and the contents of organic acids, nutrients, chlorophyll and phytol were tested after unsealing, respectively, in addition, their change conditions before and after ensiling were also ana?lyzed. The results showed that before or after ensiling, chlorophyll and phytol contents decreased significantly with the increase of harvesting height of king grass. After ensiling, about 74% chlorophyll was decomposed in the king grass silage, however, phytol content hardly changed. Although significantly differences exited in or?ganic acid contents in king grass silage at different harvesting heights ( P＜0.05) , the relations between the chlorophyll and phytol contents and fermentation indexes ( pH, the contents of lactic acid, lactic acid, propi?onic acid and butyric acid) were not found in king grass silage. In summary, phytol can be preserved well dur?ing ensiling, and there is no relation between phytol content and fermentation quality in king grass silage.[ Chi?nese Journal of Animal Nutrition, 2019, 31(9) :4208?4217]关键词
王草/刈割高度/青贮/叶绿素/叶绿醇Key words
king grass/harvesting height/silage/chlorophyll/phytol分类
农业科技引用本文复制引用
吕仁龙,胡海超,张兴波,李茂,王定发,周汉林..不同刈割高度王草中叶绿素和叶绿醇含量在青贮前后的变动[J].动物营养学报,2019,31(9):4208-4217,10.基金项目
国家重点研发计划项目"山羊规模化高效安全养殖关键技术集成与示范"(2018YFD0501903) （2018YFD0501903）
2019年中央级公益性科研院所基本科研业务费专项(1630032019027) （1630032019027）
海南省重大科技计划项目( ZDKJ2016017⁃03) （ ZDKJ2016017⁃03）
