中国麻业科学2017，Vol.39Issue(5)：257-263,7.
氮素水平对不同氮效率苎麻纤维发育关键酶的影响
Effects of Nitrogen Levels on Enzyme Activity Related to Fiber Development of Ramie Varieties with Different Nitrogen Utilization Efficiency
摘要
Abstract
Two ramie varieties,H2000-03 with average nitrogen utilization efficiency is 46.01％ and Ceheng Jiama,with average nitrogen utilization efficiency 15.81％,were used to perform potted experiment,with 5 nitrogen application levels (0 mmol/L,6 mmol/L,9 mmol/L,12 mmol/L,15 mmol/L),under glass in Changsha,Hunan Province.Enzyme activities related to fiber development were analyzed for understanding their physiological mechanism under different nitrogen levels.The results showed that:Sucrose synthetase (SS),β-1,3-Glucanase and IAAO activities increased along with the increasing of nitrogen application.The increasing rate slowed down when nitrogen amount exceeded 9 mmol/L.Every enzyme activity showed a single-peak curve along with the growth periods of ramie and the sequence from high to low was fast growing period,seedling period and maturing period.Enzyme activities of H2000-03,which had a higher nitrogen utilization efficiency,was higher than Ceheng Jiama,especially for SS and β-1,3-Glucanase at early period (seedling and fast growing period),for IAAO at later period (fast growing and maturing period) (p ＜0.05).Raw fiber yield of ramie was significantly affected by enzyme activities and showed different responding characteristics between varieties.Ramie variety with high nitrogen utilization efficiency was more sensitive to enzyme.There was an optimum range of nitrogen for fiber development of ramie.Ramie variety with high nitrogen utilization was better tolerated to higher nitrogen levels and represented higher productivity and yield stability.关键词
苎麻/氮效率/纤维/酶/氮素水平Key words
ramie/nitrogen utilization efficiency/fiber development/enzyme/nitrogen levels分类
农业科技引用本文复制引用
陈继康,谭龙涛,喻春明,朱爱国,陈平,高钢,陈坤梅,熊和平..氮素水平对不同氮效率苎麻纤维发育关键酶的影响[J].中国麻业科学,2017,39(5):257-263,7.基金项目
中国农业科学院基本科研业务费专项资助(1610242016027) （1610242016027）
国家麻类产业技术体系建设专项资助(CARS-19) （CARS-19）
